[ 3.5.y.z extended stable ] Linux 3.5.7.7 stable review

[ 3.5.y.z extended stable ] Linux 3.5.7.7 stable review

[Luis Henriques]

I am announcing the review cycle for the 3.5.7.7 stable release. This new
release contains 139 patches, which are posted as a response to this
message. They are also available at the following repository:

git://kernel.ubuntu.com/ubuntu/linux.git linux-3.5.y-review

If there are any problems, or if anything is missing, please answer to
this or to any of the followup patches. Note that any answer should be
made at maximum in 3 days, after that the final release of 3.5.7.7 will be
made.

For more information about the 3.5.y.z extended stable tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Included below are the diffstat and shortlog for this release.

-Luis

-- 
 arch/arm/kernel/sched_clock.c                    |   4 +-
 arch/arm/mach-imx/clk-imx25.c                    |   3 +
 arch/arm/mach-pxa/include/mach/smemc.h           |   1 +
 arch/arm/mach-pxa/smemc.c                        |  15 ++-
 arch/arm/mach-s3c24xx/include/mach/debug-macro.S |  12 +-
 arch/arm/mach-s3c24xx/include/mach/entry-macro.S |   4 +-
 arch/arm/mach-s3c24xx/pm-h1940.S                 |   2 +-
 arch/arm/mach-s3c24xx/sleep-s3c2410.S            |  12 +-
 arch/arm/mach-s3c24xx/sleep-s3c2412.S            |  12 +-
 arch/arm/mach-versatile/core.c                   |  15 ++-
 arch/arm/mach-versatile/pci.c                    |  11 +-
 arch/arm/plat-samsung/include/plat/debug-macro.S |  18 +--
 arch/parisc/include/asm/pgtable.h                |  13 +-
 arch/parisc/kernel/cache.c                       |  18 +++
 arch/powerpc/Kconfig                             |   4 +
 arch/powerpc/include/asm/eeh.h                   |   4 +
 arch/powerpc/kernel/machine_kexec_64.c           |   5 +
 arch/powerpc/kernel/of_platform.c                |   3 +
 arch/powerpc/kernel/pci-common.c                 |   7 +-
 arch/powerpc/lib/Makefile                        |   4 +-
 arch/powerpc/platforms/pseries/eeh.c             |  24 +++-
 arch/s390/kvm/kvm-s390.c                         |   8 ++
 arch/sparc/mm/tsb.c                              |   2 +-
 arch/x86/Kconfig                                 |   4 -
 arch/x86/include/asm/mmzone_32.h                 |   6 -
 arch/x86/kernel/cpu/mshyperv.c                   |   3 +-
 arch/x86/kernel/step.c                           |  53 +++++---
 arch/x86/mm/numa.c                               |  32 ++---
 arch/x86/mm/numa_32.c                            | 161 -----------------------
 arch/x86/mm/numa_internal.h                      |   6 -
 arch/x86/platform/efi/efi.c                      |   5 +-
 arch/x86/power/hibernate_32.c                    |   2 -
 arch/x86/xen/spinlock.c                          |   1 -
 arch/x86/xen/xen-asm_32.S                        |  14 +-
 drivers/acpi/sleep.c                             |   8 ++
 drivers/base/bus.c                               |   4 +-
 drivers/base/dd.c                                |   2 +
 drivers/block/sunvdc.c                           |   2 +-
 drivers/dca/dca-core.c                           |   5 +
 drivers/gpio/gpio-ich.c                          |   1 +
 drivers/gpu/drm/drm_crtc.c                       |   3 +-
 drivers/gpu/drm/drm_edid.c                       |   6 +-
 drivers/gpu/drm/drm_usb.c                        |   2 +-
 drivers/gpu/drm/i915/i915_debugfs.c              |  12 +-
 drivers/gpu/drm/i915/i915_reg.h                  |   2 +
 drivers/gpu/drm/i915/intel_display.c             |  15 ++-
 drivers/gpu/drm/radeon/atombios_crtc.c           |   6 +-
 drivers/gpu/drm/radeon/r600_hdmi.c               |   1 -
 drivers/gpu/drm/udl/udl_drv.h                    |   2 +
 drivers/gpu/drm/udl/udl_fb.c                     |  48 ++++++-
 drivers/hid/hid-wiimote-ext.c                    |   8 +-
 drivers/iommu/intel-iommu.c                      |   8 +-
 drivers/media/rc/rc-main.c                       |   4 +-
 drivers/media/video/v4l2-device.c                |  30 ++---
 drivers/mmc/host/sdhci-esdhc-imx.c               |  19 +--
 drivers/net/ethernet/intel/igb/igb_main.c        |   8 +-
 drivers/net/wireless/b43/dma.h                   |   2 +-
 drivers/net/wireless/b43/main.c                  |   3 +-
 drivers/net/wireless/p54/p54usb.c                |   2 +-
 drivers/net/wireless/rtlwifi/rtl8192cu/sw.c      |   9 +-
 drivers/net/wireless/rtlwifi/usb.c               |  49 ++++---
 drivers/net/wireless/rtlwifi/usb.h               |   3 +-
 drivers/net/xen-netback/interface.c              |   3 +-
 drivers/net/xen-netback/netback.c                |   8 +-
 drivers/pcmcia/vrc4171_card.c                    |   1 +
 drivers/power/ab8500_btemp.c                     |   2 +-
 drivers/power/abx500_chargalg.c                  |   2 +-
 drivers/pps/clients/pps-ldisc.c                  |  10 +-
 drivers/pps/pps.c                                |  47 ++++++-
 drivers/s390/kvm/kvm_virtio.c                    |  38 ++++--
 drivers/staging/comedi/comedi_fops.c             |  13 +-
 drivers/staging/comedi/drivers/ni_labpc.c        |  35 ++---
 drivers/staging/vt6656/usbpipe.c                 |  28 ++--
 drivers/target/target_core_device.c              |  13 +-
 drivers/target/target_core_fabric_configfs.c     |  12 +-
 drivers/target/target_core_internal.h            |   2 +-
 drivers/target/target_core_tpg.c                 |  10 +-
 drivers/tty/n_gsm.c                              |  42 +++++-
 drivers/tty/serial/imx.c                         |  11 +-
 drivers/tty/tty_ioctl.c                          |   4 +-
 drivers/tty/vt/vt.c                              | 136 +++++++++++++------
 drivers/usb/dwc3/gadget.c                        |  17 +--
 drivers/usb/host/ehci-omap.c                     |  10 +-
 drivers/usb/serial/ftdi_sio.c                    |  20 ++-
 drivers/usb/serial/mct_u232.c                    |  22 ++--
 drivers/usb/serial/option.c                      |  16 ++-
 drivers/usb/serial/quatech2.c                    |  18 ++-
 drivers/usb/serial/sierra.c                      |   8 +-
 drivers/usb/serial/ssu100.c                      |  19 ++-
 drivers/usb/serial/usb-serial.c                  |  14 +-
 drivers/usb/serial/usb_wwan.c                    |   8 +-
 drivers/usb/storage/initializers.c               |   4 +-
 drivers/usb/storage/unusual_cypress.h            |   2 +-
 drivers/video/backlight/adp8860_bl.c             |   2 +-
 drivers/video/backlight/adp8870_bl.c             |   2 +-
 drivers/video/console/fbcon.c                    |  47 ++++++-
 drivers/video/console/vgacon.c                   |  22 +++-
 drivers/video/fbmem.c                            |   9 +-
 drivers/video/fbsysfs.c                          |   3 +
 drivers/video/fsl-diu-fb.c                       |   6 +-
 drivers/xen/evtchn.c                             |  10 ++
 drivers/xen/xen-pciback/pciback_ops.c            |  14 +-
 fs/block_dev.c                                   |   1 +
 fs/direct-io.c                                   |   2 +-
 fs/ext4/balloc.c                                 |  13 +-
 fs/ext4/extents.c                                |  25 ++--
 fs/ext4/indirect.c                               |   9 +-
 fs/ext4/inode.c                                  |  11 +-
 fs/ext4/mballoc.c                                |   6 +-
 fs/ext4/mmp.c                                    |   2 +
 fs/ext4/page-io.c                                |  10 +-
 fs/ext4/resize.c                                 |   8 +-
 fs/ext4/xattr.c                                  |  10 +-
 fs/lockd/clntproc.c                              |   3 +
 fs/nfs/blocklayout/blocklayout.c                 |   1 +
 fs/nfs/nfs4proc.c                                |   3 +-
 fs/nfs/objlayout/objio_osd.c                     |   1 +
 fs/notify/inotify/inotify_user.c                 |   4 -
 fs/ocfs2/aops.c                                  |   2 +-
 fs/ocfs2/dlmglue.c                               |   5 +-
 fs/ubifs/orphan.c                                |  12 +-
 fs/ubifs/ubifs.h                                 |   6 +-
 include/linux/console.h                          |   2 +
 include/linux/idr.h                              |  11 ++
 include/linux/if_vlan.h                          |   6 +-
 include/linux/mmu_notifier.h                     |   1 +
 include/linux/pps_kernel.h                       |  17 ++-
 include/linux/quota.h                            |   1 +
 include/linux/usb/audio.h                        |   6 +-
 include/linux/vt_kern.h                          |   3 +
 include/net/inet6_hashtables.h                   |   8 +-
 include/net/inet_sock.h                          |   1 +
 include/net/ipv6.h                               |  12 ++
 include/net/sock.h                               |   2 +-
 kernel/cgroup.c                                  |   8 ++
 kernel/cpuset.c                                  |  12 +-
 kernel/futex.c                                   |   2 -
 kernel/futex_compat.c                            |   2 -
 kernel/hrtimer.c                                 |  36 ++---
 kernel/irq/spurious.c                            |   7 +-
 kernel/posix-cpu-timers.c                        |  23 +++-
 kernel/posix-timers.c                            |   7 +
 kernel/timeconst.pl                              |   6 +-
 kernel/trace/ftrace.c                            |  46 +++++--
 mm/fadvise.c                                     |  18 ++-
 mm/mmu_notifier.c                                | 147 ++++++++++++---------
 mm/shmem.c                                       |  10 +-
 net/bridge/br_stp_bpdu.c                         |   2 +
 net/core/datagram.c                              |   2 +-
 net/core/sock_diag.c                             |   3 +
 net/ipv4/af_inet.c                               |   9 +-
 net/ipv4/ping.c                                  |   4 +-
 sound/drivers/aloop.c                            |   5 +-
 sound/pci/ali5451/ali5451.c                      |   2 +-
 sound/pci/hda/patch_hdmi.c                       |   7 +-
 sound/pci/hda/patch_realtek.c                    |   1 +
 sound/pci/rme32.c                                |   2 +-
 sound/soc/codecs/wm2200.c                        |   4 +-
 sound/usb/quirks-table.h                         |   2 +-
 tools/perf/Makefile                              |   4 +-
 tools/perf/util/parse-events.y                   |   1 -
 tools/perf/util/pmu.y                            |   1 -
 162 files changed, 1235 insertions(+), 784 deletions(-)

Adam Thomas (2):
      UBIFS: fix use of freed ubifs_orphan objects
      UBIFS: fix double free of ubifs_orphan objects

Alan Cox (1):
      fb: rework locking to fix lock ordering on takeover

Alex Deucher (2):
      drm/radeon/dce6: fix display powergating
      drm/radeon: remove overzealous warning in hdmi handling

Alexander Duyck (1):
      igb: Remove artificial restriction on RQDPC stat reading

Anatolij Gustschin (1):
      drivers/video: fsl-diu-fb: fix pixel formats for 24 and 16 bpp

Andrea Arcangeli (1):
      mm: mmu_notifier: make the mmu_notifier srcu static

Arnd Bergmann (1):
      ARM: samsung: fix assembly syntax for new gas

Ben Widawsky (1):
      drm/i915: Fix CAGF for HSW

Bjorn Helgaas (1):
      Driver core: treat unregistered bus_types as having no devices

Bjørn Mork (3):
      USB: option: add and update Alcatel modems
      USB: option: add Yota / Megafon M100-1 4g modem
      USB: option: add Huawei "ACM" devices using protocol = vendor

Chris Rattray (1):
      ASoC: wm2200: correct IN2L and IN3L digital mute

Christian Borntraeger (1):
      s390/kvm: Fix store status for ACRS/FPRS

Clemens Ladisch (1):
      ALSA: usb-audio: fix Roland A-PRO support

Cong Wang (1):
      vlan: adjust vlan_set_encap_proto() for its callers

Cornelia Huck (1):
      KVM: s390: Handle hosts not supporting s390-virtio.

Dan Carpenter (1):
      rc: unlock on error in show_protocols()

Daniel Vetter (3):
      Revert "drm: Add EDID_QUIRK_FORCE_REDUCED_BLANKING for ASUS VW222S"
      drm/i915: inverted brightness quirk for Acer Aspire 4736Z
      intel/iommu: force writebuffer-flush quirk on Gen 4 Chipsets

Dave Airlie (5):
      vgacon/vt: clear buffer attributes when we load a 512 character font (v2)
      fbcon: don't lose the console font across generic->chip driver switch
      drm/usb: bind driver to correct device
      drm/udl: make usage as a console safer
      drm/udl: disable fb_defio by default

Dave Hansen (1):
      x86-32, mm: Rip out x86_32 NUMA remapping code

David Henningsson (1):
      ALSA: hda - hdmi: ELD shouldn't be valid after unplug

David Herrmann (1):
      HID: wiimote: fix nunchuck button parser

David S. Miller (2):
      sunvdc: Fix off-by-one in generic_request().
      sparc64: Fix gfp_flags setting in tsb_grow().

David Vrabel (2):
      xen-netback: correctly return errors from netbk_count_requests()
      xen-netback: cancel the credit timer when taking the vif down

Denis Efremov (2):
      ALSA: rme32.c irq enabling after spin_lock_irq
      ALSA: ali5451: remove irq enabling in pointer callback

Dirkjan Bussink (1):
      tty: Prevent deadlock in n_gsm driver

Eric Dumazet (2):
      ipv6: use a stronger hash for tcp
      net: fix infinite loop in __skb_recv_datagram()

Eryu Guan (1):
      ext4: check bh in ext4_read_block_bitmap()

Fernando Luis Vázquez Cao (1):
      ALSA: hda - Workaround for silent output on Sony Vaio VGC-LN51JGB with ALC889

George Spelvin (3):
      pps: Add pps_lookup_dev() function
      pps: Use pps_lookup_dev to reduce ldisc coupling
      pps: Fix a use-after free bug when unregistering a source.

Grant Likely (1):
      drivercore: Fix ordering between deferred_probe and exiting initcalls

Greg Thelen (1):
      tmpfs: fix use-after-free of mempolicy object

H. Peter Anvin (3):
      x86-32, mm: Remove reference to resume_map_numa_kva()
      x86-32, mm: Remove reference to alloc_remap()
      timeconst.pl: Eliminate Perl warning

Ian Abbott (4):
      staging: comedi: disallow COMEDI_DEVCONFIG on non-board minors
      staging: comedi: check s->async for poll(), read() and write()
      staging: comedi: ni_labpc: set up command4 register *after* command3
      staging: comedi: ni_labpc: correct differential channel sequence for AI commands

Igor Grinberg (1):
      ARM: PXA3xx: program the CSMSADRCFG register

Jan Beulich (2):
      x86/xen: don't assume %ds is usable in xen_iret for 32-bit PVOPS.
      xen-pciback: rate limit error messages from xen_pcibk_enable_msi{,x}()

Jan Kara (3):
      ext4: fix possible use-after-free with AIO
      fs: Fix possible use-after-free with AIO
      ocfs2: fix possible use-after-free with AIO

Jani Nikula (1):
      drm/i915: add missing \n to UTS_RELEASE in the error_state

Jean Delvare (2):
      pcmcia/vrc4171: Add missing spinlock init
      gpio/ich: Add missing spinlock init

Jim Somerville (1):
      inotify: remove broken mask checks causing unmount to be EINVAL

Johan Hovold (1):
      USB: serial: fix null-pointer dereferences on disconnect

John David Anglin (1):
      Purge existing TLB entries in set_pte_at and ptep_set_wrprotect

Joonsoo Kim (1):
      ARM: 7643/1: sched: correct update_sched_clock()

Joseph Salisbury (1):
      ACPI: Add DMI entry for Sony VGN-FW41E_H

Josh Boyer (1):
      USB: usb-storage: unusual_devs update for Super TOP SATA bridge

Junxiao Bi (1):
      ocfs2: unlock super lock if lockres refresh failed

Jussi Kivilinna (1):
      rtlwifi: usb: allocate URB control message setup_packet and data buffer separately

Larry Finger (4):
      rtlwifi: rtl8192cu: Fix NULL dereference BUG when using new_id
      rtlwifi: rtl8192cu: Add new USB ID
      b43: Increase number of RX DMA slots
      b43: Fix lockdep splat on module unload

Lars-Peter Clausen (1):
      drivers/video/backlight/adp88?0_bl.c: fix resume

Laurent Pinchart (1):
      v4l: Reset subdev v4l2_dev field to NULL if registration fails

Lee Jones (1):
      ab8500-chargalg: Only root should have write permission on sysfs file

Leonid Shatz (1):
      hrtimer: Prevent hrtimer_enqueue_reprogram race

Li Wei (1):
      ipv4: fix a bug in ping_err().

Li Zefan (2):
      cgroup: fix exit() vs rmdir() race
      cpuset: fix cpuset_print_task_mems_allowed() vs rename() race

Linus Walleij (1):
      ARM: 7635/1: versatile: fix the PCI IRQ regression

Lukas Czerner (2):
      ext4: fix xattr block allocation/release with bigalloc
      ext4: fix free clusters calculation in bigalloc filesystem

MITSUNARI Shigeo (1):
      fs/block_dev.c: page cache wrongly left invalidated after revalidate_disk()

Maciej Sosnowski (1):
      dca: check against empty dca_domains list before unregister provider

Malcolm Priestley (1):
      staging: vt6656: Fix URB submitted while active warning.

Mathias Krause (1):
      sock_diag: Fix out-of-bounds access to sock_diag_handlers[]

Matt Fleming (1):
      x86, efi: Make "noefi" really disable EFI runtime serivces

Mel Gorman (1):
      mm/fadvise.c: drain all pagevecs if POSIX_FADV_DONTNEED fails to discard all pages

Mika Kuoppala (1):
      drm/i915: disable shared panel fitter for pipe

Nicholas Bellinger (2):
      target: Fix lookup of dynamic NodeACLs during cached demo-mode operation
      target: Add missing mapped_lun bounds checking during make_mappedlun setup

Niu Yawei (1):
      ext4: fix race in ext4_mb_add_n_trim()

Olaf Hering (1):
      x86: Hyper-V: register clocksource only if its advertised

Oleg Nesterov (3):
      tty: set_termios/set_termiox should not return -EINTR
      ptrace/x86: Introduce set_task_blockstep() helper
      ptrace/x86: Partly fix set_task_blockstep()->update_debugctlmsr() logic

Patrik Jakobsson (1):
      drm/i915: Set i9xx sdvo clock limits according to specifications

Paulo Zanoni (1):
      drm: don't add inferred modes for monitors that don't support them

Pawel Moll (1):
      ALSA: usb: Fix Processing Unit Descriptor parsers

Phileas Fogg (1):
      powerpc/kexec: Disable hard IRQ before kexec

Philipp Reisner (1):
      idr: idr_for_each_entry() macro

Pratyush Anand (3):
      USB: DWC3: Generate interrupt on each TRB as default option
      usb: dwc3: gadget: fix skip LINK_TRB on ISOC
      usb: dwc3: gadget: req->queued must be forced to false in cleanup

Rajanikanth H.V (1):
      ab8500_btemp: Demote initcall sequence

Robin Holt (1):
      mmu_notifier_unregister NULL Pointer deref and multiple ->release() callouts

Roger Quadros (2):
      USB: ehci-omap: Don't free gpios that we didn't request
      USB: ehci-omap: Fix autoloading of module

Sagi Grimberg (1):
      mm: mmu_notifier: have mmu_notifiers use a global SRCU so they may safely schedule

Shawn Guo (1):
      mmc: sdhci-esdhc-imx: fix host version read

Stanislaw Gruszka (1):
      posix-cpu-timers: Fix nanosleep task_struct leak

Stefan Bader (1):
      xen: Send spinlock IPI to all waiters

Steffen Trumtrar (1):
      ARM: i.MX25: clk: parent per5_clk to AHB clock

Stephen Hemminger (1):
      bridge: set priority of STP packets

Steven Rostedt (Red Hat) (1):
      ftrace: Call ftrace cleanup module notifier after all other notifiers

Suzuki K. Poulose (1):
      uprobes/powerpc: Add dependency on single step emulation

Takashi Iwai (3):
      ALSA: hda - Release assigned pin/cvt at error path of hdmi_pcm_open()
      ALSA: aloop: Fix Oops while PM resume
      fb: Yet another band-aid for fixing lockdep mess

Tejun Heo (1):
      posix-timer: Don't call idr_find() with out-of-range ID

Thadeu Lima de Souza Cascardo (1):
      powerpc/eeh: Fix crash when adding a device in a slot with DDW

Theodore Ts'o (2):
      ext4: return ENOMEM if sb_getblk() fails
      quota: autoload the quota_v2 module for QFMT_VFS_V1 quota format

Thomas Gleixner (3):
      genirq: Avoid deadlock in spurious handling
      serial: imx: Fix recursive locking bug
      futex: Revert "futex: Mark get_robust_list as deprecated"

Tomasz Guszkowski (1):
      p54usb: corrected USB ID for T-Com Sinus 154 data II

Trond Myklebust (1):
      NLM: Ensure that we resend all pending blocking locks after a reclaim

Ville Syrjälä (2):
      drm: Fill depth/bits_per_pixel for C8 format
      drm: Use C8 instead of RGB332 when determining the format from depth/bpp

Vinson Lee (1):
      perf tools: Fix build with bison 2.3 and older.

Wei Liu (1):
      xen: close evtchn port if binding to irq fails

Weston Andros Adamson (1):
      NFSv4.1: Don't decode skipped layoutgets

Ying Xue (1):
      net: fix a compile error when SOCK_REFCNT_DEBUG is enabled

fanchaoting (1):
      umount oops when remove blocklayoutdriver first

fangxiaozhi (1):
      USB: storage: properly handle the endian issues of idProduct

[PATCH 001/139] genirq: Avoid deadlock in spurious handling

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Thomas Gleixner <tglx@linutronix.de>

commit e716efde75267eab919cdb2bef5b2cb77f305326 upstream.

commit 52553ddf(genirq: fix regression in irqfixup, irqpoll)
introduced a potential deadlock by calling the action handler with the
irq descriptor lock held.

Remove the call and let the handling code run even for an interrupt
where only a single action is registered. That matches the goal of
the above commit and avoids the deadlock.

Document the confusing action = desc->action reload in the handling
loop while at it.

Reported-and-tested-by: "Wang, Warner" <warner.wang@hp.com>
Tested-by: Edward Donovan <edward.donovan@numble.net>
Cc: "Wang, Song-Bo (Stoney)" <song-bo.wang@hp.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 kernel/irq/spurious.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/kernel/irq/spurious.c b/kernel/irq/spurious.c
index 611cd60..7b5f012 100644
--- a/kernel/irq/spurious.c
+++ b/kernel/irq/spurious.c
@@ -80,13 +80,11 @@ static int try_one_irq(int irq, struct irq_desc *desc, bool force)
 
 	/*
 	 * All handlers must agree on IRQF_SHARED, so we test just the
-	 * first. Check for action->next as well.
+	 * first.
 	 */
 	action = desc->action;
 	if (!action || !(action->flags & IRQF_SHARED) ||
-	    (action->flags & __IRQF_TIMER) ||
-	    (action->handler(irq, action->dev_id) == IRQ_HANDLED) ||
-	    !action->next)
+	    (action->flags & __IRQF_TIMER))
 		goto out;
 
 	/* Already running on another processor */
@@ -104,6 +102,7 @@ static int try_one_irq(int irq, struct irq_desc *desc, bool force)
 	do {
 		if (handle_irq_event(desc) == IRQ_HANDLED)
 			ret = IRQ_HANDLED;
+		/* Make sure that there is still a valid action */
 		action = desc->action;
 	} while ((desc->istate & IRQS_PENDING) && action);
 	desc->istate &= ~IRQS_POLL_INPROGRESS;
-- 
1.8.1.2

[PATCH 002/139] KVM: s390: Handle hosts not supporting s390-virtio.

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Cornelia Huck <cornelia.huck@de.ibm.com>

commit 55c171a6d90dc0574021f9c836127cfd1a7d2e30 upstream.

Running under a kvm host does not necessarily imply the presence of
a page mapped above the main memory with the virtio information;
however, the code includes a hard coded access to that page.

Instead, check for the presence of the page and exit gracefully
before we hit an addressing exception if it does not exist.

Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com>
Reviewed-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/s390/kvm/kvm_virtio.c | 38 ++++++++++++++++++++++++++++++--------
 1 file changed, 30 insertions(+), 8 deletions(-)

diff --git a/drivers/s390/kvm/kvm_virtio.c b/drivers/s390/kvm/kvm_virtio.c
index d74e9ae..f97b2aa 100644
--- a/drivers/s390/kvm/kvm_virtio.c
+++ b/drivers/s390/kvm/kvm_virtio.c
@@ -418,6 +418,26 @@ static void kvm_extint_handler(struct ext_code ext_code,
 }
 
 /*
+ * For s390-virtio, we expect a page above main storage containing
+ * the virtio configuration. Try to actually load from this area
+ * in order to figure out if the host provides this page.
+ */
+static int __init test_devices_support(unsigned long addr)
+{
+	int ret = -EIO;
+
+	asm volatile(
+		"0:	lura	0,%1\n"
+		"1:	xgr	%0,%0\n"
+		"2:\n"
+		EX_TABLE(0b,2b)
+		EX_TABLE(1b,2b)
+		: "+d" (ret)
+		: "a" (addr)
+		: "0", "cc");
+	return ret;
+}
+/*
  * Init function for virtio
  * devices are in a single page above top of "normal" mem
  */
@@ -428,21 +448,23 @@ static int __init kvm_devices_init(void)
 	if (!MACHINE_IS_KVM)
 		return -ENODEV;
 
+	if (test_devices_support(real_memory_size) < 0)
+		return -ENODEV;
+
+	rc = vmem_add_mapping(real_memory_size, PAGE_SIZE);
+	if (rc)
+		return rc;
+
+	kvm_devices = (void *) real_memory_size;
+
 	kvm_root = root_device_register("kvm_s390");
 	if (IS_ERR(kvm_root)) {
 		rc = PTR_ERR(kvm_root);
 		printk(KERN_ERR "Could not register kvm_s390 root device");
+		vmem_remove_mapping(real_memory_size, PAGE_SIZE);
 		return rc;
 	}
 
-	rc = vmem_add_mapping(real_memory_size, PAGE_SIZE);
-	if (rc) {
-		root_device_unregister(kvm_root);
-		return rc;
-	}
-
-	kvm_devices = (void *) real_memory_size;
-
 	INIT_WORK(&hotplug_work, hotplug_devices);
 
 	service_subclass_irq_register();
-- 
1.8.1.2

[PATCH 003/139] rc: unlock on error in show_protocols()

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Dan Carpenter <dan.carpenter@oracle.com>

commit 30ebc5e44d057a1619ad63fe32c8c1670c37c4b8 upstream.

We recently introduced a new return -ENODEV in this function but we need
to unlock before returning.

[mchehab@redhat.com: found two patches with the same fix. Merged SOB's/acks into one patch]
Acked-by: Herton R. Krzesinski <herton.krzesinski@canonical.com>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Douglas Bagnall <douglas@paradise.net.nz>

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/media/rc/rc-main.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/media/rc/rc-main.c b/drivers/media/rc/rc-main.c
index cabc19c..cec1f8c 100644
--- a/drivers/media/rc/rc-main.c
+++ b/drivers/media/rc/rc-main.c
@@ -778,8 +778,10 @@ static ssize_t show_protocols(struct device *device,
 	} else if (dev->raw) {
 		enabled = dev->raw->enabled_protocols;
 		allowed = ir_raw_get_allowed_protocols();
-	} else
+	} else {
+		mutex_unlock(&dev->lock);
 		return -ENODEV;
+	}
 
 	IR_dprintk(1, "allowed - 0x%llx, enabled - 0x%llx\n",
 		   (long long)allowed,
-- 
1.8.1.2

[PATCH 004/139] v4l: Reset subdev v4l2_dev field to NULL if registration fails

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

commit 317efce991620adc589b3005b9baed433dcb2a56 upstream.

When subdev registration fails the subdev v4l2_dev field is left to a
non-NULL value. Later calls to v4l2_device_unregister_subdev() will
consider the subdev as registered and will module_put() the subdev
module without any matching module_get().
Fix this by setting the subdev v4l2_dev field to NULL in
v4l2_device_register_subdev() when the function fails.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
[ luis: adjust context ]
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/media/video/v4l2-device.c | 30 ++++++++++++++----------------
 1 file changed, 14 insertions(+), 16 deletions(-)

diff --git a/drivers/media/video/v4l2-device.c b/drivers/media/video/v4l2-device.c
index 1f203b8..683ae99 100644
--- a/drivers/media/video/v4l2-device.c
+++ b/drivers/media/video/v4l2-device.c
@@ -159,31 +159,21 @@ int v4l2_device_register_subdev(struct v4l2_device *v4l2_dev,
 	sd->v4l2_dev = v4l2_dev;
 	if (sd->internal_ops && sd->internal_ops->registered) {
 		err = sd->internal_ops->registered(sd);
-		if (err) {
-			module_put(sd->owner);
-			return err;
-		}
+		if (err)
+			goto error_module;
 	}
 
 	/* This just returns 0 if either of the two args is NULL */
 	err = v4l2_ctrl_add_handler(v4l2_dev->ctrl_handler, sd->ctrl_handler);
-	if (err) {
-		if (sd->internal_ops && sd->internal_ops->unregistered)
-			sd->internal_ops->unregistered(sd);
-		module_put(sd->owner);
-		return err;
-	}
+	if (err)
+		goto error_unregister;
 
 #if defined(CONFIG_MEDIA_CONTROLLER)
 	/* Register the entity. */
 	if (v4l2_dev->mdev) {
 		err = media_device_register_entity(v4l2_dev->mdev, entity);
-		if (err < 0) {
-			if (sd->internal_ops && sd->internal_ops->unregistered)
-				sd->internal_ops->unregistered(sd);
-			module_put(sd->owner);
-			return err;
-		}
+		if (err < 0)
+			goto error_unregister;
 	}
 #endif
 
@@ -192,6 +182,14 @@ int v4l2_device_register_subdev(struct v4l2_device *v4l2_dev,
 	spin_unlock(&v4l2_dev->lock);
 
 	return 0;
+
+error_unregister:
+	if (sd->internal_ops && sd->internal_ops->unregistered)
+		sd->internal_ops->unregistered(sd);
+error_module:
+	module_put(sd->owner);
+	sd->v4l2_dev = NULL;
+	return err;
 }
 EXPORT_SYMBOL_GPL(v4l2_device_register_subdev);
 
-- 
1.8.1.2

[PATCH 005/139] powerpc/eeh: Fix crash when adding a device in a slot with DDW

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Thadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com>

commit 6a040ce72598159a74969a2d01ab0ba5ee6536b3 upstream.

The DDW code uses a eeh_dev struct from the pci_dev. However, this is
not set until eeh_add_device_late is called.

Since pci_bus_add_devices is called before eeh_add_device_late, the PCI
devices are added to the bus, making drivers' probe hooks to be called.
These will call set_dma_mask, which will call the DDW code, which will
require the eeh_dev struct from pci_dev. This would result in a crash,
due to a NULL dereference.

Calling eeh_add_device_late after pci_bus_add_devices would make the
system BUG, because device files shouldn't be added to devices there
were not added to the system. So, a new function is needed to add such
files only after pci_bus_add_devices have been called.

Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com>
Acked-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
[ luis: adjust context ]
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 arch/powerpc/include/asm/eeh.h       |  4 ++++
 arch/powerpc/kernel/of_platform.c    |  3 +++
 arch/powerpc/kernel/pci-common.c     |  7 +++++--
 arch/powerpc/platforms/pseries/eeh.c | 24 +++++++++++++++++++++++-
 4 files changed, 35 insertions(+), 3 deletions(-)

diff --git a/arch/powerpc/include/asm/eeh.h b/arch/powerpc/include/asm/eeh.h
index d60f998..c487556 100644
--- a/arch/powerpc/include/asm/eeh.h
+++ b/arch/powerpc/include/asm/eeh.h
@@ -130,6 +130,7 @@ int eeh_dn_check_failure(struct device_node *dn, struct pci_dev *dev);
 void __init pci_addr_cache_build(void);
 void eeh_add_device_tree_early(struct device_node *);
 void eeh_add_device_tree_late(struct pci_bus *);
+void eeh_add_sysfs_files(struct pci_bus *);
 void eeh_remove_bus_device(struct pci_dev *);
 
 /**
@@ -183,7 +184,10 @@ static inline void eeh_add_device_tree_early(struct device_node *dn) { }
 
 static inline void eeh_add_device_tree_late(struct pci_bus *bus) { }
 
+static inline void eeh_add_sysfs_files(struct pci_bus *bus) { }
+
 static inline void eeh_remove_bus_device(struct pci_dev *dev) { }
+
 #define EEH_POSSIBLE_ERROR(val, type) (0)
 #define EEH_IO_ERROR_VALUE(size) (-1UL)
 #endif /* CONFIG_EEH */
diff --git a/arch/powerpc/kernel/of_platform.c b/arch/powerpc/kernel/of_platform.c
index 2049f2d..2089fbd 100644
--- a/arch/powerpc/kernel/of_platform.c
+++ b/arch/powerpc/kernel/of_platform.c
@@ -95,6 +95,9 @@ static int __devinit of_pci_phb_probe(struct platform_device *dev)
 	/* Add probed PCI devices to the device model */
 	pci_bus_add_devices(phb->bus);
 
+	/* sysfs files should only be added after devices are added */
+	eeh_add_sysfs_files(phb->bus);
+
 	return 0;
 }
 
diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c
index 8e78e93..41d69fc 100644
--- a/arch/powerpc/kernel/pci-common.c
+++ b/arch/powerpc/kernel/pci-common.c
@@ -1458,11 +1458,14 @@ void pcibios_finish_adding_to_bus(struct pci_bus *bus)
 	pcibios_allocate_bus_resources(bus);
 	pcibios_claim_one_bus(bus);
 
+	/* Fixup EEH */
+	eeh_add_device_tree_late(bus);
+
 	/* Add new devices to global lists.  Register in proc, sysfs. */
 	pci_bus_add_devices(bus);
 
-	/* Fixup EEH */
-	eeh_add_device_tree_late(bus);
+	/* sysfs files should only be added after devices are added */
+	eeh_add_sysfs_files(bus);
 }
 EXPORT_SYMBOL_GPL(pcibios_finish_adding_to_bus);
 
diff --git a/arch/powerpc/platforms/pseries/eeh.c b/arch/powerpc/platforms/pseries/eeh.c
index 9a0b5f5..b1d91b5 100644
--- a/arch/powerpc/platforms/pseries/eeh.c
+++ b/arch/powerpc/platforms/pseries/eeh.c
@@ -1088,7 +1088,6 @@ static void eeh_add_device_late(struct pci_dev *dev)
 	dev->dev.archdata.edev = edev;
 
 	pci_addr_cache_insert_device(dev);
-	eeh_sysfs_add_device(dev);
 }
 
 /**
@@ -1115,6 +1114,29 @@ void eeh_add_device_tree_late(struct pci_bus *bus)
 EXPORT_SYMBOL_GPL(eeh_add_device_tree_late);
 
 /**
+ * eeh_add_sysfs_files - Add EEH sysfs files for the indicated PCI bus
+ * @bus: PCI bus
+ *
+ * This routine must be used to add EEH sysfs files for PCI
+ * devices which are attached to the indicated PCI bus. The PCI bus
+ * is added after system boot through hotplug or dlpar.
+ */
+void eeh_add_sysfs_files(struct pci_bus *bus)
+{
+	struct pci_dev *dev;
+
+	list_for_each_entry(dev, &bus->devices, bus_list) {
+		eeh_sysfs_add_device(dev);
+		if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) {
+			struct pci_bus *subbus = dev->subordinate;
+			if (subbus)
+				eeh_add_sysfs_files(subbus);
+		}
+	}
+}
+EXPORT_SYMBOL_GPL(eeh_add_sysfs_files);
+
+/**
  * eeh_remove_device - Undo EEH setup for the indicated pci device
  * @dev: pci device to be removed
  *
-- 
1.8.1.2

[PATCH 006/139] pcmcia/vrc4171: Add missing spinlock init

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jean Delvare <khali@linux-fr.org>

commit 811af9723859884f2f771f3174f3ddedab7c53b5 upstream.

It doesn't seem this spinlock was properly initialized. This bug was
introduced by commit 7a410e8d4d97457c8c381e2de9cdc7bd3306badc.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/pcmcia/vrc4171_card.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/pcmcia/vrc4171_card.c b/drivers/pcmcia/vrc4171_card.c
index 86e4a1a..6bb02ab 100644
--- a/drivers/pcmcia/vrc4171_card.c
+++ b/drivers/pcmcia/vrc4171_card.c
@@ -246,6 +246,7 @@ static int pccard_init(struct pcmcia_socket *sock)
 	socket = &vrc4171_sockets[slot];
 	socket->csc_irq = search_nonuse_irq();
 	socket->io_irq = search_nonuse_irq();
+	spin_lock_init(&socket->lock);
 
 	return 0;
 }
-- 
1.8.1.2

[PATCH 007/139] USB: DWC3: Generate interrupt on each TRB as default option

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Pratyush Anand <pratyush.anand@st.com>

commit 206dd69a62a06197b308fa0decfd0b649fcc2811 upstream.

Currently in case of isoc, interrupt is programmed after each
TRB_NUM/4 ie 8th TRB. A TRB is programmed against each submitted
request from gadget. If we do not want to limit the minimum number of
necessary request to be submitted from gadget then we must receive
interrupt on each TRB submission. There can be such situation with a
gadget working with ping-pong buffer.

If a gadget does not want to receive interrupt after each request
completion then it may set no_interrupt flag.

Signed-off-by: Pratyush Anand <pratyush.anand@st.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/usb/dwc3/gadget.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 1f53210..edfff45 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -744,8 +744,7 @@ static void dwc3_prepare_one_trb(struct dwc3_ep *dep,
 	case USB_ENDPOINT_XFER_ISOC:
 		trb->ctrl = DWC3_TRBCTL_ISOCHRONOUS_FIRST;
 
-		/* IOC every DWC3_TRB_NUM / 4 so we can refill */
-		if (!(cur_slot % (DWC3_TRB_NUM / 4)))
+		if (!req->request.no_interrupt)
 			trb->ctrl |= DWC3_TRB_CTRL_IOC;
 		break;
 
-- 
1.8.1.2

[PATCH 008/139] usb: dwc3: gadget: fix skip LINK_TRB on ISOC

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Pratyush Anand <pratyush.anand@st.com>

commit 915e202aeeb59e272992a6364c910aaef3073544 upstream.

When we reach to link trb, we just need to increase free_slot and then
calculate TRB. Return is not correct, as it will cause wrong TRB DMA
address to fetch in case of update transfer.

Signed-off-by: Pratyush Anand <pratyush.anand@st.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/usb/dwc3/gadget.c | 13 +++++--------
 1 file changed, 5 insertions(+), 8 deletions(-)

diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index edfff45..9ba53de 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -710,21 +710,18 @@ static void dwc3_prepare_one_trb(struct dwc3_ep *dep,
 	struct dwc3		*dwc = dep->dwc;
 	struct dwc3_trb		*trb;
 
-	unsigned int		cur_slot;
-
 	dev_vdbg(dwc->dev, "%s: req %p dma %08llx length %d%s%s\n",
 			dep->name, req, (unsigned long long) dma,
 			length, last ? " last" : "",
 			chain ? " chain" : "");
 
-	trb = &dep->trb_pool[dep->free_slot & DWC3_TRB_MASK];
-	cur_slot = dep->free_slot;
-	dep->free_slot++;
-
 	/* Skip the LINK-TRB on ISOC */
-	if (((cur_slot & DWC3_TRB_MASK) == DWC3_TRB_NUM - 1) &&
+	if (((dep->free_slot & DWC3_TRB_MASK) == DWC3_TRB_NUM - 1) &&
 			usb_endpoint_xfer_isoc(dep->endpoint.desc))
-		return;
+		dep->free_slot++;
+
+	trb = &dep->trb_pool[dep->free_slot & DWC3_TRB_MASK];
+	dep->free_slot++;
 
 	if (!req->trb) {
 		dwc3_gadget_move_request_queued(req);
-- 
1.8.1.2

[PATCH 009/139] usb: dwc3: gadget: req->queued must be forced to false in cleanup

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Pratyush Anand <pratyush.anand@st.com>

commit c9fda7d6f62a6520e01652d370654c5657d3c1a1 upstream.

I am not sure, why I found it during SG debugging. But, I noticed that
even when req_queued list was empty, there were some request in
request_list having queued flag true. If I run test second time, it
first removes all request from request_list and hence busy_slot was
wrongly incremented.

Signed-off-by: Pratyush Anand <pratyush.anand@st.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
[ luis: adjust context ]
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/usb/dwc3/gadget.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 9ba53de..fae7885 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -231,6 +231,7 @@ void dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req,
 		if (((dep->busy_slot & DWC3_TRB_MASK) == DWC3_TRB_NUM - 1) &&
 				usb_endpoint_xfer_isoc(dep->endpoint.desc))
 			dep->busy_slot++;
+		req->queued = false;
 	}
 	list_del(&req->list);
 	req->trb = NULL;
-- 
1.8.1.2

[PATCH 010/139] Purge existing TLB entries in set_pte_at and ptep_set_wrprotect

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: John David Anglin <dave.anglin@bell.net>

commit 7139bc1579901b53db7e898789e916ee2fb52d78 upstream.

This patch goes a long way toward fixing the minifail bug, and
it  significantly improves the stability of SMP machines such as
the rp3440.  When write  protecting a page for COW, we need to
purge the existing translation.  Otherwise, the COW break
doesn't occur as expected because the TLB may still have a stale entry
which allows writes.

[jejb: fix up checkpatch errors]
Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 arch/parisc/include/asm/pgtable.h | 13 ++++++++++---
 arch/parisc/kernel/cache.c        | 18 ++++++++++++++++++
 2 files changed, 28 insertions(+), 3 deletions(-)

diff --git a/arch/parisc/include/asm/pgtable.h b/arch/parisc/include/asm/pgtable.h
index ee99f23..7df49fa 100644
--- a/arch/parisc/include/asm/pgtable.h
+++ b/arch/parisc/include/asm/pgtable.h
@@ -12,11 +12,10 @@
 
 #include <linux/bitops.h>
 #include <linux/spinlock.h>
+#include <linux/mm_types.h>
 #include <asm/processor.h>
 #include <asm/cache.h>
 
-struct vm_area_struct;
-
 /*
  * kern_addr_valid(ADDR) tests if ADDR is pointing to valid kernel
  * memory.  For the return value to be meaningful, ADDR must be >=
@@ -40,7 +39,14 @@ struct vm_area_struct;
         do{                                                     \
                 *(pteptr) = (pteval);                           \
         } while(0)
-#define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval)
+
+extern void purge_tlb_entries(struct mm_struct *, unsigned long);
+
+#define set_pte_at(mm, addr, ptep, pteval)                      \
+	do {                                                    \
+		set_pte(ptep, pteval);                          \
+		purge_tlb_entries(mm, addr);                    \
+	} while (0)
 
 #endif /* !__ASSEMBLY__ */
 
@@ -466,6 +472,7 @@ static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr,
 		old = pte_val(*ptep);
 		new = pte_val(pte_wrprotect(__pte (old)));
 	} while (cmpxchg((unsigned long *) ptep, old, new) != old);
+	purge_tlb_entries(mm, addr);
 #else
 	pte_t old_pte = *ptep;
 	set_pte_at(mm, addr, ptep, pte_wrprotect(old_pte));
diff --git a/arch/parisc/kernel/cache.c b/arch/parisc/kernel/cache.c
index 9d18189..fa21463 100644
--- a/arch/parisc/kernel/cache.c
+++ b/arch/parisc/kernel/cache.c
@@ -420,6 +420,24 @@ void kunmap_parisc(void *addr)
 EXPORT_SYMBOL(kunmap_parisc);
 #endif
 
+void purge_tlb_entries(struct mm_struct *mm, unsigned long addr)
+{
+	unsigned long flags;
+
+	/* Note: purge_tlb_entries can be called at startup with
+	   no context.  */
+
+	/* Disable preemption while we play with %sr1.  */
+	preempt_disable();
+	mtsp(mm->context, 1);
+	purge_tlb_start(flags);
+	pdtlb(addr);
+	pitlb(addr);
+	purge_tlb_end(flags);
+	preempt_enable();
+}
+EXPORT_SYMBOL(purge_tlb_entries);
+
 void __flush_tlb_range(unsigned long sid, unsigned long start,
 		       unsigned long end)
 {
-- 
1.8.1.2

[PATCH 011/139] ARM: PXA3xx: program the CSMSADRCFG register

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Igor Grinberg <grinberg@compulab.co.il>

commit d107a204154ddd79339203c2deeb7433f0cf6777 upstream.

The Chip Select Configuration Register must be programmed to 0x2 in
order to achieve the correct behavior of the Static Memory Controller.

Without this patch devices wired to DFI and accessed through SMC cannot
be accessed after resume from S2.

Do not rely on the boot loader to program the CSMSADRCFG register by
programming it in the kernel smemc module.

Signed-off-by: Igor Grinberg <grinberg@compulab.co.il>
Acked-by: Eric Miao <eric.y.miao@gmail.com>
Signed-off-by: Haojian Zhuang <haojian.zhuang@gmail.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 arch/arm/mach-pxa/include/mach/smemc.h |  1 +
 arch/arm/mach-pxa/smemc.c              | 15 ++++++++++++++-
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/arch/arm/mach-pxa/include/mach/smemc.h b/arch/arm/mach-pxa/include/mach/smemc.h
index b7de471..b802f28 100644
--- a/arch/arm/mach-pxa/include/mach/smemc.h
+++ b/arch/arm/mach-pxa/include/mach/smemc.h
@@ -37,6 +37,7 @@
 #define CSADRCFG1	(SMEMC_VIRT + 0x84)  /* Address Configuration Register for CS1 */
 #define CSADRCFG2	(SMEMC_VIRT + 0x88)  /* Address Configuration Register for CS2 */
 #define CSADRCFG3	(SMEMC_VIRT + 0x8C)  /* Address Configuration Register for CS3 */
+#define CSMSADRCFG	(SMEMC_VIRT + 0xA0)  /* Chip Select Configuration Register */
 
 /*
  * More handy macros for PCMCIA
diff --git a/arch/arm/mach-pxa/smemc.c b/arch/arm/mach-pxa/smemc.c
index 7992305..f38aa89 100644
--- a/arch/arm/mach-pxa/smemc.c
+++ b/arch/arm/mach-pxa/smemc.c
@@ -40,6 +40,8 @@ static void pxa3xx_smemc_resume(void)
 	__raw_writel(csadrcfg[1], CSADRCFG1);
 	__raw_writel(csadrcfg[2], CSADRCFG2);
 	__raw_writel(csadrcfg[3], CSADRCFG3);
+	/* CSMSADRCFG wakes up in its default state (0), so we need to set it */
+	__raw_writel(0x2, CSMSADRCFG);
 }
 
 static struct syscore_ops smemc_syscore_ops = {
@@ -49,8 +51,19 @@ static struct syscore_ops smemc_syscore_ops = {
 
 static int __init smemc_init(void)
 {
-	if (cpu_is_pxa3xx())
+	if (cpu_is_pxa3xx()) {
+		/*
+		 * The only documentation we have on the
+		 * Chip Select Configuration Register (CSMSADRCFG) is that
+		 * it must be programmed to 0x2.
+		 * Moreover, in the bit definitions, the second bit
+		 * (CSMSADRCFG[1]) is called "SETALWAYS".
+		 * Other bits are reserved in this register.
+		 */
+		__raw_writel(0x2, CSMSADRCFG);
+
 		register_syscore_ops(&smemc_syscore_ops);
+	}
 
 	return 0;
 }
-- 
1.8.1.2

[PATCH 012/139] ab8500-chargalg: Only root should have write permission on sysfs file

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Lee Jones <lee.jones@linaro.org>

commit e3455002d04276c256a531f7175dce0f7d1cb78a upstream.

Only root should have write permission on sysfs file ab8500_chargalg/chargalg.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/power/abx500_chargalg.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/power/abx500_chargalg.c b/drivers/power/abx500_chargalg.c
index 804b88c..d8cd151 100644
--- a/drivers/power/abx500_chargalg.c
+++ b/drivers/power/abx500_chargalg.c
@@ -1698,7 +1698,7 @@ static ssize_t abx500_chargalg_sysfs_charger(struct kobject *kobj,
 static struct attribute abx500_chargalg_en_charger = \
 {
 	.name = "chargalg",
-	.mode = S_IWUGO,
+	.mode = S_IWUSR,
 };
 
 static struct attribute *abx500_chargalg_chg[] = {
-- 
1.8.1.2

[PATCH 013/139] USB: option: add and update Alcatel modems

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: =?UTF-8?q?Bj=C3=B8rn=20Mork?= <bjorn@mork.no>

commit f8f0302bbcbd1b14655bef29f6996a2152be559d upstream.

Adding three currently unsupported modems based on information
from .inf driver files:

  Diag  VID_1BBB&PID_0052&MI_00
  AGPS  VID_1BBB&PID_0052&MI_01
  VOICE VID_1BBB&PID_0052&MI_02
  AT    VID_1BBB&PID_0052&MI_03
  Modem VID_1BBB&PID_0052&MI_05
  wwan  VID_1BBB&PID_0052&MI_06

  Diag  VID_1BBB&PID_00B6&MI_00
  AT    VID_1BBB&PID_00B6&MI_01
  Modem VID_1BBB&PID_00B6&MI_02
  wwan  VID_1BBB&PID_00B6&MI_03

  Diag  VID_1BBB&PID_00B7&MI_00
  AGPS  VID_1BBB&PID_00B7&MI_01
  VOICE VID_1BBB&PID_00B7&MI_02
  AT    VID_1BBB&PID_00B7&MI_03
  Modem VID_1BBB&PID_00B7&MI_04
  wwan  VID_1BBB&PID_00B7&MI_05

Updating the blacklist info for the X060S_X200 and X220_X500D,
reserving interfaces for a wwan driver, based on

  wwan VID_1BBB&PID_0000&MI_04
  wwan VID_1BBB&PID_0017&MI_06

Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/usb/serial/option.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/serial/option.c b/drivers/usb/serial/option.c
index 5f4ce8e..b5fd2f8 100644
--- a/drivers/usb/serial/option.c
+++ b/drivers/usb/serial/option.c
@@ -479,6 +479,7 @@ static const struct option_blacklist_info four_g_w14_blacklist = {
 
 static const struct option_blacklist_info alcatel_x200_blacklist = {
 	.sendsetup = BIT(0) | BIT(1),
+	.reserved = BIT(4),
 };
 
 static const struct option_blacklist_info zte_0037_blacklist = {
@@ -1215,7 +1216,14 @@ static const struct usb_device_id option_ids[] = {
 	{ USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_X060S_X200),
 	  .driver_info = (kernel_ulong_t)&alcatel_x200_blacklist
 	},
-	{ USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_X220_X500D) },
+	{ USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_X220_X500D),
+	  .driver_info = (kernel_ulong_t)&net_intf6_blacklist },
+	{ USB_DEVICE(ALCATEL_VENDOR_ID, 0x0052),
+	  .driver_info = (kernel_ulong_t)&net_intf6_blacklist },
+	{ USB_DEVICE(ALCATEL_VENDOR_ID, 0x00b6),
+	  .driver_info = (kernel_ulong_t)&net_intf3_blacklist },
+	{ USB_DEVICE(ALCATEL_VENDOR_ID, 0x00b7),
+	  .driver_info = (kernel_ulong_t)&net_intf5_blacklist },
 	{ USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_L100V),
 	  .driver_info = (kernel_ulong_t)&net_intf4_blacklist },
 	{ USB_DEVICE(AIRPLUS_VENDOR_ID, AIRPLUS_PRODUCT_MCD650) },
-- 
1.8.1.2

[PATCH 014/139] uprobes/powerpc: Add dependency on single step emulation

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: "Suzuki K. Poulose" <suzuki@in.ibm.com>

commit 5e249d4528528c9a77da051a89ec7f99d31b83eb upstream.

Uprobes uses emulate_step in sstep.c, but we haven't explicitly specified
the dependency. On pseries HAVE_HW_BREAKPOINT protects us, but 44x has no
such luxury.

Consolidate other users that depend on sstep and create a new config option.

Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Signed-off-by: Suzuki K. Poulose <suzuki@in.ibm.com>
Cc: linuxppc-dev@ozlabs.org
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
[ luis: adjust context ]
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 arch/powerpc/Kconfig      | 4 ++++
 arch/powerpc/lib/Makefile | 4 +---
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 050cb37..4d8336c 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -264,6 +264,10 @@ config PPC_ADV_DEBUG_DAC_RANGE
 	depends on PPC_ADV_DEBUG_REGS && 44x
 	default y
 
+config PPC_EMULATE_SSTEP
+	bool
+	default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT
+
 source "init/Kconfig"
 
 source "kernel/Kconfig.freezer"
diff --git a/arch/powerpc/lib/Makefile b/arch/powerpc/lib/Makefile
index 7735a2c..3230bc1 100644
--- a/arch/powerpc/lib/Makefile
+++ b/arch/powerpc/lib/Makefile
@@ -18,9 +18,7 @@ obj-$(CONFIG_PPC64)	+= copypage_64.o copyuser_64.o \
 			   memcpy_64.o usercopy_64.o mem_64.o string.o \
 			   checksum_wrappers_64.o hweight_64.o \
 			   copyuser_power7.o
-obj-$(CONFIG_XMON)	+= sstep.o ldstfp.o
-obj-$(CONFIG_KPROBES)	+= sstep.o ldstfp.o
-obj-$(CONFIG_HAVE_HW_BREAKPOINT)	+= sstep.o ldstfp.o
+obj-$(CONFIG_PPC_EMULATE_SSTEP)	+= sstep.o ldstfp.o
 
 ifeq ($(CONFIG_PPC64),y)
 obj-$(CONFIG_SMP)	+= locks.o
-- 
1.8.1.2

[PATCH 015/139] drivers/video: fsl-diu-fb: fix pixel formats for 24 and 16 bpp

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Anatolij Gustschin <agust@denx.de>

commit 5d3cc311a76073f6e0a27c0752f7e41f69e95ea7 upstream.

Framebuffer colors for 24 and 16 bpp are currently wrong. The order
of the color component arguments in the MAKE_PF() is not natural
and causes some confusion. The generated pixel format values for 24
and 16 bpp depths do not much the values in the comments.

Fix the macro arguments to be in the natural RGB order and adjust
the arguments for all depths to generate correct pixel format values
(equal to the values mentioned in the comments).

Signed-off-by: Anatolij Gustschin <agust@denx.de>
Cc: Timur Tabi <timur@tabi.org>
Acked-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/video/fsl-diu-fb.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/video/fsl-diu-fb.c b/drivers/video/fsl-diu-fb.c
index 458c006..dbce2da 100644
--- a/drivers/video/fsl-diu-fb.c
+++ b/drivers/video/fsl-diu-fb.c
@@ -922,7 +922,7 @@ static u32 fsl_diu_get_pixel_format(unsigned int bits_per_pixel)
 #define PF_COMP_0_MASK		0x0000000F
 #define PF_COMP_0_SHIFT		0
 
-#define MAKE_PF(alpha, red, blue, green, size, c0, c1, c2, c3) \
+#define MAKE_PF(alpha, red, green, blue, size, c0, c1, c2, c3) \
 	cpu_to_le32(PF_BYTE_F | (alpha << PF_ALPHA_C_SHIFT) | \
 	(blue << PF_BLUE_C_SHIFT) | (green << PF_GREEN_C_SHIFT) | \
 	(red << PF_RED_C_SHIFT) | (c3 << PF_COMP_3_SHIFT) | \
@@ -932,10 +932,10 @@ static u32 fsl_diu_get_pixel_format(unsigned int bits_per_pixel)
 	switch (bits_per_pixel) {
 	case 32:
 		/* 0x88883316 */
-		return MAKE_PF(3, 2, 0, 1, 3, 8, 8, 8, 8);
+		return MAKE_PF(3, 2, 1, 0, 3, 8, 8, 8, 8);
 	case 24:
 		/* 0x88082219 */
-		return MAKE_PF(4, 0, 1, 2, 2, 0, 8, 8, 8);
+		return MAKE_PF(4, 0, 1, 2, 2, 8, 8, 8, 0);
 	case 16:
 		/* 0x65053118 */
 		return MAKE_PF(4, 2, 1, 0, 1, 5, 6, 5, 0);
-- 
1.8.1.2

[PATCH 016/139] s390/kvm: Fix store status for ACRS/FPRS

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Christian Borntraeger <borntraeger@de.ibm.com>

commit 15bc8d8457875f495c59d933b05770ba88d1eacb upstream.

On store status we need to copy the current state of registers
into a save area. Currently we might save stale versions:
The sie state descriptor doesnt have fields for guest ACRS,FPRS,
those registers are simply stored in the host registers. The host
program must copy these away if needed. We do that in vcpu_put/load.

If we now do a store status in KVM code between vcpu_put/load, the
saved values are not up-to-date. Lets collect the ACRS/FPRS before
saving them.

This also fixes some strange problems with hotplug and virtio-ccw,
since the low level machine check handler (on hotplug a machine check
will happen) will revalidate all registers with the content of the
save area.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 arch/s390/kvm/kvm-s390.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index cea9701..62b5053 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -752,6 +752,14 @@ int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr)
 	} else
 		prefix = 0;
 
+	/*
+	 * The guest FPRS and ACRS are in the host FPRS/ACRS due to the lazy
+	 * copying in vcpu load/put. Lets update our copies before we save
+	 * it into the save area
+	 */
+	save_fp_regs(&vcpu->arch.guest_fpregs);
+	save_access_regs(vcpu->run->s.regs.acrs);
+
 	if (__guestcopy(vcpu, addr + offsetof(struct save_area, fp_regs),
 			vcpu->arch.guest_fpregs.fprs, 128, prefix))
 		return -EFAULT;
-- 
1.8.1.2

[PATCH 017/139] staging: comedi: disallow COMEDI_DEVCONFIG on non-board minors

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Ian Abbott <abbotti@mev.co.uk>

commit 754ab5c0e55dd118273ca2c217c4d95e9fbc8259 upstream.

Comedi has two sorts of minor devices:
(a) normal board minor devices in the range 0 to
COMEDI_NUM_BOARD_MINORS-1 inclusive; and
(b) special subdevice minor devices in the range COMEDI_NUM_BOARD_MINORS
upwards that are used to open the same underlying comedi device as the
normal board minor devices, but with non-default read and write
subdevices for asynchronous commands.

The special subdevice minor devices get created when a board supporting
asynchronous commands is attached to a normal board minor device, and
destroyed when the board is detached from the normal board minor device.
One way to attach or detach a board is by using the COMEDI_DEVCONFIG
ioctl.  This should only be used on normal board minors as the special
subdevice minors are too ephemeral.  In particular, the change
introduced in commit 7d3135af399e92cf4c9bbc5f86b6c140aab3b88c ("staging:
comedi: prevent auto-unconfig of manually configured devices") breaks
horribly for special subdevice minor devices.

Since there's no legitimate use for the COMEDI_DEVCONFIG ioctl on a
special subdevice minor device node, disallow it and return -ENOTTY.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/staging/comedi/comedi_fops.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/staging/comedi/comedi_fops.c b/drivers/staging/comedi/comedi_fops.c
index d231193..2831080 100644
--- a/drivers/staging/comedi/comedi_fops.c
+++ b/drivers/staging/comedi/comedi_fops.c
@@ -425,6 +425,11 @@ static long comedi_unlocked_ioctl(struct file *file, unsigned int cmd,
 	/* Device config is special, because it must work on
 	 * an unconfigured device. */
 	if (cmd == COMEDI_DEVCONFIG) {
+		if (minor >= COMEDI_NUM_BOARD_MINORS) {
+			/* Device config not appropriate on non-board minors. */
+			rc = -ENOTTY;
+			goto done;
+		}
 		rc = do_devconfig_ioctl(dev,
 					(struct comedi_devconfig __user *)arg);
 		if (rc == 0)
-- 
1.8.1.2

[PATCH 018/139] tty: Prevent deadlock in n_gsm driver

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Dirkjan Bussink <d.bussink@gmail.com>

commit 4d9b109060f690f5c835130ff54165ae157b3087 upstream.

This change fixes a deadlock when the multiplexer is closed while there
are still client side ports open.

When the multiplexer is closed and there are active tty's it tries to
close them with tty_vhangup. This has a problem though, because
tty_vhangup needs the tty_lock. This patch changes it to unlock the
tty_lock before attempting the hangup and relocks afterwards. The
additional call to tty_port_tty_set is needed because otherwise the
port stays active because of the reference counter.

This change also exposed another problem that other code paths don't
expect that the multiplexer could have been closed. This patch also adds
checks for these cases in the gsmtty_ class of function that could be
called.

The documentation explicitly states that "first close all virtual ports
before closing the physical port" but we've found this to not always
reality in our field situations. The GPRS / UTMS modem sometimes crashes
and needs a power cycle in that case which means cleanly shutting down
everything is not always possible. This change makes it much more robust
for our situation where at least the system is recoverable with this patch
and doesn't hang in a deadlock situation inside the kernel.

The patch is against the long term support kernel (3.4.27) and should
apply cleanly to more recent branches. Tested with a Telit GE864-QUADV2
and Telit HE910 modem.

Signed-off-by: Dirkjan Bussink <dirkjan.bussink@nedap.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[ luis: adjust context ]
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/tty/n_gsm.c | 42 +++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 41 insertions(+), 1 deletion(-)

diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c
index 90dff82..4056483 100644
--- a/drivers/tty/n_gsm.c
+++ b/drivers/tty/n_gsm.c
@@ -1692,6 +1692,8 @@ static inline void dlci_put(struct gsm_dlci *dlci)
 	kref_put(&dlci->ref, gsm_dlci_free);
 }
 
+static void gsm_destroy_network(struct gsm_dlci *dlci);
+
 /**
  *	gsm_dlci_release		-	release DLCI
  *	@dlci: DLCI to destroy
@@ -1705,9 +1707,19 @@ static void gsm_dlci_release(struct gsm_dlci *dlci)
 {
 	struct tty_struct *tty = tty_port_tty_get(&dlci->port);
 	if (tty) {
+		mutex_lock(&dlci->mutex);
+		gsm_destroy_network(dlci);
+		mutex_unlock(&dlci->mutex);
+
+		/* tty_vhangup needs the tty_lock, so unlock and
+		   relock after doing the hangup. */
+		tty_unlock(tty);
 		tty_vhangup(tty);
+		tty_lock(tty);
+		tty_port_tty_set(&dlci->port, NULL);
 		tty_kref_put(tty);
 	}
+	dlci->state = DLCI_CLOSED;
 	dlci_put(dlci);
 }
 
@@ -2933,6 +2945,8 @@ static void gsmtty_close(struct tty_struct *tty, struct file *filp)
 
 	if (dlci == NULL)
 		return;
+	if (dlci->state == DLCI_CLOSED)
+		return;
 	mutex_lock(&dlci->mutex);
 	gsm_destroy_network(dlci);
 	mutex_unlock(&dlci->mutex);
@@ -2951,6 +2965,8 @@ out:
 static void gsmtty_hangup(struct tty_struct *tty)
 {
 	struct gsm_dlci *dlci = tty->driver_data;
+	if (dlci->state == DLCI_CLOSED)
+		return;
 	tty_port_hangup(&dlci->port);
 	gsm_dlci_begin_close(dlci);
 }
@@ -2958,9 +2974,12 @@ static void gsmtty_hangup(struct tty_struct *tty)
 static int gsmtty_write(struct tty_struct *tty, const unsigned char *buf,
 								    int len)
 {
+	int sent;
 	struct gsm_dlci *dlci = tty->driver_data;
+	if (dlci->state == DLCI_CLOSED)
+		return -EINVAL;
 	/* Stuff the bytes into the fifo queue */
-	int sent = kfifo_in_locked(dlci->fifo, buf, len, &dlci->lock);
+	sent = kfifo_in_locked(dlci->fifo, buf, len, &dlci->lock);
 	/* Need to kick the channel */
 	gsm_dlci_data_kick(dlci);
 	return sent;
@@ -2969,18 +2988,24 @@ static int gsmtty_write(struct tty_struct *tty, const unsigned char *buf,
 static int gsmtty_write_room(struct tty_struct *tty)
 {
 	struct gsm_dlci *dlci = tty->driver_data;
+	if (dlci->state == DLCI_CLOSED)
+		return -EINVAL;
 	return TX_SIZE - kfifo_len(dlci->fifo);
 }
 
 static int gsmtty_chars_in_buffer(struct tty_struct *tty)
 {
 	struct gsm_dlci *dlci = tty->driver_data;
+	if (dlci->state == DLCI_CLOSED)
+		return -EINVAL;
 	return kfifo_len(dlci->fifo);
 }
 
 static void gsmtty_flush_buffer(struct tty_struct *tty)
 {
 	struct gsm_dlci *dlci = tty->driver_data;
+	if (dlci->state == DLCI_CLOSED)
+		return;
 	/* Caution needed: If we implement reliable transport classes
 	   then the data being transmitted can't simply be junked once
 	   it has first hit the stack. Until then we can just blow it
@@ -2999,6 +3024,8 @@ static void gsmtty_wait_until_sent(struct tty_struct *tty, int timeout)
 static int gsmtty_tiocmget(struct tty_struct *tty)
 {
 	struct gsm_dlci *dlci = tty->driver_data;
+	if (dlci->state == DLCI_CLOSED)
+		return -EINVAL;
 	return dlci->modem_rx;
 }
 
@@ -3008,6 +3035,8 @@ static int gsmtty_tiocmset(struct tty_struct *tty,
 	struct gsm_dlci *dlci = tty->driver_data;
 	unsigned int modem_tx = dlci->modem_tx;
 
+	if (dlci->state == DLCI_CLOSED)
+		return -EINVAL;
 	modem_tx &= ~clear;
 	modem_tx |= set;
 
@@ -3026,6 +3055,8 @@ static int gsmtty_ioctl(struct tty_struct *tty,
 	struct gsm_netconfig nc;
 	int index;
 
+	if (dlci->state == DLCI_CLOSED)
+		return -EINVAL;
 	switch (cmd) {
 	case GSMIOC_ENABLE_NET:
 		if (copy_from_user(&nc, (void __user *)arg, sizeof(nc)))
@@ -3052,6 +3083,9 @@ static int gsmtty_ioctl(struct tty_struct *tty,
 
 static void gsmtty_set_termios(struct tty_struct *tty, struct ktermios *old)
 {
+	struct gsm_dlci *dlci = tty->driver_data;
+	if (dlci->state == DLCI_CLOSED)
+		return;
 	/* For the moment its fixed. In actual fact the speed information
 	   for the virtual channel can be propogated in both directions by
 	   the RPN control message. This however rapidly gets nasty as we
@@ -3063,6 +3097,8 @@ static void gsmtty_set_termios(struct tty_struct *tty, struct ktermios *old)
 static void gsmtty_throttle(struct tty_struct *tty)
 {
 	struct gsm_dlci *dlci = tty->driver_data;
+	if (dlci->state == DLCI_CLOSED)
+		return;
 	if (tty->termios->c_cflag & CRTSCTS)
 		dlci->modem_tx &= ~TIOCM_DTR;
 	dlci->throttled = 1;
@@ -3073,6 +3109,8 @@ static void gsmtty_throttle(struct tty_struct *tty)
 static void gsmtty_unthrottle(struct tty_struct *tty)
 {
 	struct gsm_dlci *dlci = tty->driver_data;
+	if (dlci->state == DLCI_CLOSED)
+		return;
 	if (tty->termios->c_cflag & CRTSCTS)
 		dlci->modem_tx |= TIOCM_DTR;
 	dlci->throttled = 0;
@@ -3084,6 +3122,8 @@ static int gsmtty_break_ctl(struct tty_struct *tty, int state)
 {
 	struct gsm_dlci *dlci = tty->driver_data;
 	int encode = 0;	/* Off */
+	if (dlci->state == DLCI_CLOSED)
+		return -EINVAL;
 
 	if (state == -1)	/* "On indefinitely" - we can't encode this
 				    properly */
-- 
1.8.1.2

[PATCH 019/139] ALSA: usb-audio: fix Roland A-PRO support

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Clemens Ladisch <clemens@ladisch.de>

commit 7da58046482fceb17c4a0d4afefd9507ec56de7f upstream.

The quirk for the Roland/Cakewalk A-PRO keyboards accidentally used the
wrong interface number, which prevented the driver from attaching to the
device.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 sound/usb/quirks-table.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/usb/quirks-table.h b/sound/usb/quirks-table.h
index d73ac9b..128eb0c 100644
--- a/sound/usb/quirks-table.h
+++ b/sound/usb/quirks-table.h
@@ -1658,7 +1658,7 @@ YAMAHA_DEVICE(0x7010, "UB99"),
 	.driver_info = (unsigned long) & (const struct snd_usb_audio_quirk) {
 		/* .vendor_name = "Roland", */
 		/* .product_name = "A-PRO", */
-		.ifnum = 1,
+		.ifnum = 0,
 		.type = QUIRK_MIDI_FIXED_ENDPOINT,
 		.data = & (const struct snd_usb_midi_endpoint_info) {
 			.out_cables = 0x0003,
-- 
1.8.1.2

[PATCH 020/139] x86-32, mm: Rip out x86_32 NUMA remapping code

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Dave Hansen <dave@linux.vnet.ibm.com>

commit f03574f2d5b2d6229dcdf2d322848065f72953c7 upstream.

This code was an optimization for 32-bit NUMA systems.

It has probably been the cause of a number of subtle bugs over
the years, although the conditions to excite them would have
been hard to trigger.  Essentially, we remap part of the kernel
linear mapping area, and then sometimes part of that area gets
freed back in to the bootmem allocator.  If those pages get
used by kernel data structures (say mem_map[] or a dentry),
there's no big deal.  But, if anyone ever tried to use the
linear mapping for these pages _and_ cared about their physical
address, bad things happen.

For instance, say you passed __GFP_ZERO to the page allocator
and then happened to get handed one of these pages, it zero the
remapped page, but it would make a pte to the _old_ page.
There are probably a hundred other ways that it could screw
with things.

We don't need to hang on to performance optimizations for
these old boxes any more.  All my 32-bit NUMA systems are long
dead and buried, and I probably had access to more than most
people.

This code is causing real things to break today:

	https://lkml.org/lkml/2013/1/9/376

I looked in to actually fixing this, but it requires surgery
to way too much brittle code, as well as stuff like
per_cpu_ptr_to_phys().

[ hpa: Cc: this for -stable, since it is a memory corruption issue.
  However, an alternative is to simply mark NUMA as depends BROKEN
  rather than EXPERIMENTAL in the X86_32 subclause... ]

Link: http://lkml.kernel.org/r/20130131005616.1C79F411@kernel.stglabs.ibm.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 arch/x86/Kconfig            |   4 --
 arch/x86/mm/numa.c          |   3 -
 arch/x86/mm/numa_32.c       | 161 --------------------------------------------
 arch/x86/mm/numa_internal.h |   6 --
 4 files changed, 174 deletions(-)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index c70684f..b2b22a6 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -1244,10 +1244,6 @@ config NODES_SHIFT
 	  Specify the maximum number of NUMA Nodes available on the target
 	  system.  Increases memory reserved to accommodate various tables.
 
-config HAVE_ARCH_ALLOC_REMAP
-	def_bool y
-	depends on X86_32 && NUMA
-
 config ARCH_HAVE_MEMORY_PRESENT
 	def_bool y
 	depends on X86_32 && DISCONTIGMEM
diff --git a/arch/x86/mm/numa.c b/arch/x86/mm/numa.c
index 2d125be..02b7678 100644
--- a/arch/x86/mm/numa.c
+++ b/arch/x86/mm/numa.c
@@ -205,9 +205,6 @@ static void __init setup_node_data(int nid, u64 start, u64 end)
 	if (end && (end - start) < NODE_MIN_SIZE)
 		return;
 
-	/* initialize remap allocator before aligning to ZONE_ALIGN */
-	init_alloc_remap(nid, start, end);
-
 	start = roundup(start, ZONE_ALIGN);
 
 	printk(KERN_INFO "Initmem setup node %d [mem %#010Lx-%#010Lx]\n",
diff --git a/arch/x86/mm/numa_32.c b/arch/x86/mm/numa_32.c
index 534255a..73a6d73 100644
--- a/arch/x86/mm/numa_32.c
+++ b/arch/x86/mm/numa_32.c
@@ -73,167 +73,6 @@ unsigned long node_memmap_size_bytes(int nid, unsigned long start_pfn,
 
 extern unsigned long highend_pfn, highstart_pfn;
 
-#define LARGE_PAGE_BYTES (PTRS_PER_PTE * PAGE_SIZE)
-
-static void *node_remap_start_vaddr[MAX_NUMNODES];
-void set_pmd_pfn(unsigned long vaddr, unsigned long pfn, pgprot_t flags);
-
-/*
- * Remap memory allocator
- */
-static unsigned long node_remap_start_pfn[MAX_NUMNODES];
-static void *node_remap_end_vaddr[MAX_NUMNODES];
-static void *node_remap_alloc_vaddr[MAX_NUMNODES];
-
-/**
- * alloc_remap - Allocate remapped memory
- * @nid: NUMA node to allocate memory from
- * @size: The size of allocation
- *
- * Allocate @size bytes from the remap area of NUMA node @nid.  The
- * size of the remap area is predetermined by init_alloc_remap() and
- * only the callers considered there should call this function.  For
- * more info, please read the comment on top of init_alloc_remap().
- *
- * The caller must be ready to handle allocation failure from this
- * function and fall back to regular memory allocator in such cases.
- *
- * CONTEXT:
- * Single CPU early boot context.
- *
- * RETURNS:
- * Pointer to the allocated memory on success, %NULL on failure.
- */
-void *alloc_remap(int nid, unsigned long size)
-{
-	void *allocation = node_remap_alloc_vaddr[nid];
-
-	size = ALIGN(size, L1_CACHE_BYTES);
-
-	if (!allocation || (allocation + size) > node_remap_end_vaddr[nid])
-		return NULL;
-
-	node_remap_alloc_vaddr[nid] += size;
-	memset(allocation, 0, size);
-
-	return allocation;
-}
-
-#ifdef CONFIG_HIBERNATION
-/**
- * resume_map_numa_kva - add KVA mapping to the temporary page tables created
- *                       during resume from hibernation
- * @pgd_base - temporary resume page directory
- */
-void resume_map_numa_kva(pgd_t *pgd_base)
-{
-	int node;
-
-	for_each_online_node(node) {
-		unsigned long start_va, start_pfn, nr_pages, pfn;
-
-		start_va = (unsigned long)node_remap_start_vaddr[node];
-		start_pfn = node_remap_start_pfn[node];
-		nr_pages = (node_remap_end_vaddr[node] -
-			    node_remap_start_vaddr[node]) >> PAGE_SHIFT;
-
-		printk(KERN_DEBUG "%s: node %d\n", __func__, node);
-
-		for (pfn = 0; pfn < nr_pages; pfn += PTRS_PER_PTE) {
-			unsigned long vaddr = start_va + (pfn << PAGE_SHIFT);
-			pgd_t *pgd = pgd_base + pgd_index(vaddr);
-			pud_t *pud = pud_offset(pgd, vaddr);
-			pmd_t *pmd = pmd_offset(pud, vaddr);
-
-			set_pmd(pmd, pfn_pmd(start_pfn + pfn,
-						PAGE_KERNEL_LARGE_EXEC));
-
-			printk(KERN_DEBUG "%s: %08lx -> pfn %08lx\n",
-				__func__, vaddr, start_pfn + pfn);
-		}
-	}
-}
-#endif
-
-/**
- * init_alloc_remap - Initialize remap allocator for a NUMA node
- * @nid: NUMA node to initizlie remap allocator for
- *
- * NUMA nodes may end up without any lowmem.  As allocating pgdat and
- * memmap on a different node with lowmem is inefficient, a special
- * remap allocator is implemented which can be used by alloc_remap().
- *
- * For each node, the amount of memory which will be necessary for
- * pgdat and memmap is calculated and two memory areas of the size are
- * allocated - one in the node and the other in lowmem; then, the area
- * in the node is remapped to the lowmem area.
- *
- * As pgdat and memmap must be allocated in lowmem anyway, this
- * doesn't waste lowmem address space; however, the actual lowmem
- * which gets remapped over is wasted.  The amount shouldn't be
- * problematic on machines this feature will be used.
- *
- * Initialization failure isn't fatal.  alloc_remap() is used
- * opportunistically and the callers will fall back to other memory
- * allocation mechanisms on failure.
- */
-void __init init_alloc_remap(int nid, u64 start, u64 end)
-{
-	unsigned long start_pfn = start >> PAGE_SHIFT;
-	unsigned long end_pfn = end >> PAGE_SHIFT;
-	unsigned long size, pfn;
-	u64 node_pa, remap_pa;
-	void *remap_va;
-
-	/*
-	 * The acpi/srat node info can show hot-add memroy zones where
-	 * memory could be added but not currently present.
-	 */
-	printk(KERN_DEBUG "node %d pfn: [%lx - %lx]\n",
-	       nid, start_pfn, end_pfn);
-
-	/* calculate the necessary space aligned to large page size */
-	size = node_memmap_size_bytes(nid, start_pfn, end_pfn);
-	size += ALIGN(sizeof(pg_data_t), PAGE_SIZE);
-	size = ALIGN(size, LARGE_PAGE_BYTES);
-
-	/* allocate node memory and the lowmem remap area */
-	node_pa = memblock_find_in_range(start, end, size, LARGE_PAGE_BYTES);
-	if (!node_pa) {
-		pr_warning("remap_alloc: failed to allocate %lu bytes for node %d\n",
-			   size, nid);
-		return;
-	}
-	memblock_reserve(node_pa, size);
-
-	remap_pa = memblock_find_in_range(min_low_pfn << PAGE_SHIFT,
-					  max_low_pfn << PAGE_SHIFT,
-					  size, LARGE_PAGE_BYTES);
-	if (!remap_pa) {
-		pr_warning("remap_alloc: failed to allocate %lu bytes remap area for node %d\n",
-			   size, nid);
-		memblock_free(node_pa, size);
-		return;
-	}
-	memblock_reserve(remap_pa, size);
-	remap_va = phys_to_virt(remap_pa);
-
-	/* perform actual remap */
-	for (pfn = 0; pfn < size >> PAGE_SHIFT; pfn += PTRS_PER_PTE)
-		set_pmd_pfn((unsigned long)remap_va + (pfn << PAGE_SHIFT),
-			    (node_pa >> PAGE_SHIFT) + pfn,
-			    PAGE_KERNEL_LARGE);
-
-	/* initialize remap allocator parameters */
-	node_remap_start_pfn[nid] = node_pa >> PAGE_SHIFT;
-	node_remap_start_vaddr[nid] = remap_va;
-	node_remap_end_vaddr[nid] = remap_va + size;
-	node_remap_alloc_vaddr[nid] = remap_va;
-
-	printk(KERN_DEBUG "remap_alloc: node %d [%08llx-%08llx) -> [%p-%p)\n",
-	       nid, node_pa, node_pa + size, remap_va, remap_va + size);
-}
-
 void __init initmem_init(void)
 {
 	x86_numa_init();
diff --git a/arch/x86/mm/numa_internal.h b/arch/x86/mm/numa_internal.h
index 7178c3a..ad86ec9 100644
--- a/arch/x86/mm/numa_internal.h
+++ b/arch/x86/mm/numa_internal.h
@@ -21,12 +21,6 @@ void __init numa_reset_distance(void);
 
 void __init x86_numa_init(void);
 
-#ifdef CONFIG_X86_64
-static inline void init_alloc_remap(int nid, u64 start, u64 end)	{ }
-#else
-void __init init_alloc_remap(int nid, u64 start, u64 end);
-#endif
-
 #ifdef CONFIG_NUMA_EMU
 void __init numa_emulation(struct numa_meminfo *numa_meminfo,
 			   int numa_dist_cnt);
-- 
1.8.1.2

[PATCH 021/139] x86-32, mm: Remove reference to resume_map_numa_kva()

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: "H. Peter Anvin" <hpa@linux.intel.com>

commit bb112aec5ee41427e9b9726e3d57b896709598ed upstream.

Remove reference to removed function resume_map_numa_kva().

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Cc: Dave Hansen <dave@linux.vnet.ibm.com>
Link: http://lkml.kernel.org/r/20130131005616.1C79F411@kernel.stglabs.ibm.com
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 arch/x86/include/asm/mmzone_32.h | 6 ------
 arch/x86/power/hibernate_32.c    | 2 --
 2 files changed, 8 deletions(-)

diff --git a/arch/x86/include/asm/mmzone_32.h b/arch/x86/include/asm/mmzone_32.h
index eb05fb3..8a9b3e2 100644
--- a/arch/x86/include/asm/mmzone_32.h
+++ b/arch/x86/include/asm/mmzone_32.h
@@ -14,12 +14,6 @@ extern struct pglist_data *node_data[];
 
 #include <asm/numaq.h>
 
-extern void resume_map_numa_kva(pgd_t *pgd);
-
-#else /* !CONFIG_NUMA */
-
-static inline void resume_map_numa_kva(pgd_t *pgd) {}
-
 #endif /* CONFIG_NUMA */
 
 #ifdef CONFIG_DISCONTIGMEM
diff --git a/arch/x86/power/hibernate_32.c b/arch/x86/power/hibernate_32.c
index 74202c1..7d28c88 100644
--- a/arch/x86/power/hibernate_32.c
+++ b/arch/x86/power/hibernate_32.c
@@ -129,8 +129,6 @@ static int resume_physical_mapping_init(pgd_t *pgd_base)
 		}
 	}
 
-	resume_map_numa_kva(pgd_base);
-
 	return 0;
 }
 
-- 
1.8.1.2

[PATCH 022/139] x86-32, mm: Remove reference to alloc_remap()

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: "H. Peter Anvin" <hpa@linux.intel.com>

commit 07f4207a305c834f528d08428df4531744e25678 upstream.

We have removed the remap allocator for x86-32, and x86-64 never had
it (and doesn't need it).  Remove residual reference to it.

Reported-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Cc: Dave Hansen <dave@linux.vnet.ibm.com>
Link: http://lkml.kernel.org/r/CAE9FiQVn6_QZi3fNQ-JHYiR-7jeDJ5hT0SyT_%2BzVvfOj=PzF3w@mail.gmail.com
[ luis: adjust context ]
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 arch/x86/mm/numa.c | 29 +++++++++++------------------
 1 file changed, 11 insertions(+), 18 deletions(-)

diff --git a/arch/x86/mm/numa.c b/arch/x86/mm/numa.c
index 02b7678..8504f36 100644
--- a/arch/x86/mm/numa.c
+++ b/arch/x86/mm/numa.c
@@ -193,7 +193,6 @@ int __init numa_add_memblk(int nid, u64 start, u64 end)
 static void __init setup_node_data(int nid, u64 start, u64 end)
 {
 	const size_t nd_size = roundup(sizeof(pg_data_t), PAGE_SIZE);
-	bool remapped = false;
 	u64 nd_pa;
 	void *nd;
 	int tnid;
@@ -211,28 +210,22 @@ static void __init setup_node_data(int nid, u64 start, u64 end)
 	       nid, start, end - 1);
 
 	/*
-	 * Allocate node data.  Try remap allocator first, node-local
-	 * memory and then any node.  Never allocate in DMA zone.
+	 * Allocate node data.  Try node-local memory and then any node.
+	 * Never allocate in DMA zone.
 	 */
-	nd = alloc_remap(nid, nd_size);
-	if (nd) {
-		nd_pa = __pa(nd);
-		remapped = true;
-	} else {
-		nd_pa = memblock_alloc_nid(nd_size, SMP_CACHE_BYTES, nid);
-		if (!nd_pa) {
-			pr_err("Cannot find %zu bytes in node %d\n",
-			       nd_size, nid);
-			return;
-		}
-		nd = __va(nd_pa);
+	nd_pa = memblock_alloc_nid(nd_size, SMP_CACHE_BYTES, nid);
+	if (!nd_pa) {
+		pr_err("Cannot find %zu bytes in node %d\n",
+		       nd_size, nid);
+		return;
 	}
+	nd = __va(nd_pa);
 
 	/* report and initialize */
-	printk(KERN_INFO "  NODE_DATA [mem %#010Lx-%#010Lx]%s\n",
-	       nd_pa, nd_pa + nd_size - 1, remapped ? " (remapped)" : "");
+	printk(KERN_INFO "  NODE_DATA [mem %#010Lx-%#010Lx]\n",
+	       nd_pa, nd_pa + nd_size - 1);
 	tnid = early_pfn_to_nid(nd_pa >> PAGE_SHIFT);
-	if (!remapped && tnid != nid)
+	if (tnid != nid)
 		printk(KERN_INFO "    NODE_DATA(%d) on node %d\n", nid, tnid);
 
 	node_data[nid] = nd;
-- 
1.8.1.2

[PATCH 023/139] ALSA: hda - Release assigned pin/cvt at error path of hdmi_pcm_open()

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Takashi Iwai <tiwai@suse.de>

commit 2ad779b7329d6894a80df94e693e72eaa0d56790 upstream.

If the driver detects and invalid ELD, it gives an open error.
But it forgot to release the assigned pin, converter and spdif ctls
before returning.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 sound/pci/hda/patch_hdmi.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index f212c37..063afa2 100644
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -926,8 +926,12 @@ static int hdmi_pcm_open(struct hda_pcm_stream *hinfo,
 	if (!static_hdmi_pcm && eld->eld_valid) {
 		snd_hdmi_eld_update_pcm_info(eld, hinfo);
 		if (hinfo->channels_min > hinfo->channels_max ||
-		    !hinfo->rates || !hinfo->formats)
+		    !hinfo->rates || !hinfo->formats) {
+			per_cvt->assigned = 0;
+			hinfo->nid = 0;
+			snd_hda_spdif_ctls_unassign(codec, pin_idx);
 			return -ENODEV;
+		}
 	}
 
 	/* Store the updated parameters */
-- 
1.8.1.2

[PATCH 024/139] ab8500_btemp: Demote initcall sequence

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: "Rajanikanth H.V" <rajanikanth.hv@stericsson.com>

commit eeb0751c99522a4d1bbcc7b6bc1460cd07d07488 upstream.

Power supply subsystem creates thermal zone device for the property
'POWER_SUPPLY_PROP_TEMP' which requires thermal subsystem to be ready
before 'ab8500 battery temperature monitor' driver is initialized. ab8500
btemp driver is initialized with subsys_initcall whereas thermal subsystem
is initialized with fs_initcall which causes
thermal_zone_device_register(...) to crash since the required structure
'thermal_class' is not initialized yet:

Unable to handle kernel NULL pointer dereference at virtual address 000000a4
pgd = c0004000
[000000a4] *pgd=00000000
Internal error: Oops: 5 [#1] PREEMPT SMP ARM
Modules linked in:
CPU: 0    Tainted: G        W     (3.8.0-rc4-00001-g632fda8-dirty #1)
PC is at _raw_spin_lock+0x18/0x54
LR is at get_device_parent+0x50/0x1b8
pc : [<c02f1dd0>]    lr : [<c01cb248>]    psr: 60000013
sp : ef04bdc8  ip : 00000000  fp : c0446180
r10: ef216e38  r9 : c03af5d0  r8 : ef275c18
r7 : 00000000  r6 : c0476c14  r5 : ef275c18  r4 : ef095840
r3 : ef04a000  r2 : 00000001  r1 : 00000000  r0 : 000000a4
Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment kernel
Control: 10c5787d  Table: 0000404a  DAC: 00000015
Process swapper/0 (pid: 1, stack limit = 0xef04a238)
Stack: (0xef04bdc8 to 0xef04c000)
[...]
[<c02f1dd0>] (_raw_spin_lock+0x18/0x54) from [<c01cb248>] (get_device_parent+0x50/0x1b8)
[<c01cb248>] (get_device_parent+0x50/0x1b8) from [<c01cb8d8>] (device_add+0xa4/0x574)
[<c01cb8d8>] (device_add+0xa4/0x574) from [<c020b91c>] (thermal_zone_device_register+0x118/0x938)
[<c020b91c>] (thermal_zone_device_register+0x118/0x938) from [<c0202030>] (power_supply_register+0x170/0x1f8)
[<c0202030>] (power_supply_register+0x170/0x1f8) from [<c02055ec>] (ab8500_btemp_probe+0x208/0x47c)
[<c02055ec>] (ab8500_btemp_probe+0x208/0x47c) from [<c01cf0dc>] (platform_drv_probe+0x14/0x18)
[<c01cf0dc>] (platform_drv_probe+0x14/0x18) from [<c01cde70>] (driver_probe_device+0x74/0x20c)
[<c01cde70>] (driver_probe_device+0x74/0x20c) from [<c01ce094>] (__driver_attach+0x8c/0x90)
[<c01ce094>] (__driver_attach+0x8c/0x90) from [<c01cc640>] (bus_for_each_dev+0x4c/0x80)
[<c01cc640>] (bus_for_each_dev+0x4c/0x80) from [<c01cd6b4>] (bus_add_driver+0x16c/0x23c)
[<c01cd6b4>] (bus_add_driver+0x16c/0x23c) from [<c01ce54c>] (driver_register+0x78/0x14c)
[<c01ce54c>] (driver_register+0x78/0x14c) from [<c00086ac>] (do_one_initcall+0xfc/0x164)
[<c00086ac>] (do_one_initcall+0xfc/0x164) from [<c02e89c8>] (kernel_init+0x120/0x2b8)
[<c02e89c8>] (kernel_init+0x120/0x2b8) from [<c000e358>] (ret_from_fork+0x14/0x3c)
Code: e3c3303f e5932004 e2822001 e5832004 (e1903f9f)
---[ end trace ed9df72941b5bada ]---

Signed-off-by: Rajanikanth H.V <rajanikanth.hv@stericsson.com>
Signed-off-by: Anton Vorontsov <anton@enomsg.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/power/ab8500_btemp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/power/ab8500_btemp.c b/drivers/power/ab8500_btemp.c
index bba3cca..8e3329e 100644
--- a/drivers/power/ab8500_btemp.c
+++ b/drivers/power/ab8500_btemp.c
@@ -1119,7 +1119,7 @@ static void __exit ab8500_btemp_exit(void)
 	platform_driver_unregister(&ab8500_btemp_driver);
 }
 
-subsys_initcall_sync(ab8500_btemp_init);
+device_initcall(ab8500_btemp_init);
 module_exit(ab8500_btemp_exit);
 
 MODULE_LICENSE("GPL v2");
-- 
1.8.1.2

[PATCH 025/139] Driver core: treat unregistered bus_types as having no devices

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Bjorn Helgaas <bhelgaas@google.com>

commit 4fa3e78be7e985ca814ce2aa0c09cbee404efcf7 upstream.

A bus_type has a list of devices (klist_devices), but the list and the
subsys_private structure that contains it are not initialized until the
bus_type is registered with bus_register().

The panic/reboot path has fixups that look up devices in pci_bus_type.  If
we panic before registering pci_bus_type, the bus_type exists but the list
does not, so mach_reboot_fixups() trips over a null pointer and panics
again:

    mach_reboot_fixups
      pci_get_device
        ..
          bus_find_device(&pci_bus_type, ...)
            bus->p is NULL

Joonsoo reported a problem when panicking before PCI was initialized.
I think this patch should be sufficient to replace the patch he posted
here: https://lkml.org/lkml/2012/12/28/75 ("[PATCH] x86, reboot: skip
reboot_fixups in early boot phase")

Reported-by: Joonsoo Kim <js1304@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/base/bus.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/base/bus.c b/drivers/base/bus.c
index 2bcef65..287b7e2 100644
--- a/drivers/base/bus.c
+++ b/drivers/base/bus.c
@@ -293,7 +293,7 @@ int bus_for_each_dev(struct bus_type *bus, struct device *start,
 	struct device *dev;
 	int error = 0;
 
-	if (!bus)
+	if (!bus || !bus->p)
 		return -EINVAL;
 
 	klist_iter_init_node(&bus->p->klist_devices, &i,
@@ -327,7 +327,7 @@ struct device *bus_find_device(struct bus_type *bus,
 	struct klist_iter i;
 	struct device *dev;
 
-	if (!bus)
+	if (!bus || !bus->p)
 		return NULL;
 
 	klist_iter_init_node(&bus->p->klist_devices, &i,
-- 
1.8.1.2

[PATCH 026/139] ALSA: aloop: Fix Oops while PM resume

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Takashi Iwai <tiwai@suse.de>

commit edac894389f9c9de2a1368c78809c824b343f3a5 upstream.

snd-aloop driver has no proper PM implementation, thus the PM resume
may trigger Oops due to leftover timer instance.  This patch adds the
missing suspend/resume implementation.

Reported-and-tested-by: El boulangero <elboulangero@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 sound/drivers/aloop.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/sound/drivers/aloop.c b/sound/drivers/aloop.c
index c5d463c..1d84692 100644
--- a/sound/drivers/aloop.c
+++ b/sound/drivers/aloop.c
@@ -289,12 +289,14 @@ static int loopback_trigger(struct snd_pcm_substream *substream, int cmd)
 			loopback_active_notify(dpcm);
 		break;
 	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+	case SNDRV_PCM_TRIGGER_SUSPEND:
 		spin_lock(&cable->lock);	
 		cable->pause |= stream;
 		spin_unlock(&cable->lock);
 		loopback_timer_stop(dpcm);
 		break;
 	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+	case SNDRV_PCM_TRIGGER_RESUME:
 		spin_lock(&cable->lock);
 		dpcm->last_jiffies = jiffies;
 		cable->pause &= ~stream;
@@ -560,7 +562,8 @@ static snd_pcm_uframes_t loopback_pointer(struct snd_pcm_substream *substream)
 static struct snd_pcm_hardware loopback_pcm_hardware =
 {
 	.info =		(SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_MMAP |
-			 SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_PAUSE),
+			 SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_PAUSE |
+			 SNDRV_PCM_INFO_RESUME),
 	.formats =	(SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE |
 			 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE |
 			 SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE),
-- 
1.8.1.2

[PATCH 027/139] ASoC: wm2200: correct IN2L and IN3L digital mute

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Chris Rattray <crattray@opensource.wolfsonmicro.com>

commit 0d2b6422529a26ac4dee06196524ba9da70cf735 upstream.

Signed-off-by: Chris Rattray <crattray@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 sound/soc/codecs/wm2200.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sound/soc/codecs/wm2200.c b/sound/soc/codecs/wm2200.c
index 8e0cf14..9932aac 100644
--- a/sound/soc/codecs/wm2200.c
+++ b/sound/soc/codecs/wm2200.c
@@ -990,9 +990,9 @@ SOC_DOUBLE_R_TLV("IN3 Volume", WM2200_IN3L_CONTROL, WM2200_IN3R_CONTROL,
 
 SOC_DOUBLE_R("IN1 Digital Switch", WM2200_ADC_DIGITAL_VOLUME_1L,
 	     WM2200_ADC_DIGITAL_VOLUME_1R, WM2200_IN1L_MUTE_SHIFT, 1, 1),
-SOC_DOUBLE_R("IN2 Digital Switch", WM2200_ADC_DIGITAL_VOLUME_1L,
+SOC_DOUBLE_R("IN2 Digital Switch", WM2200_ADC_DIGITAL_VOLUME_2L,
 	     WM2200_ADC_DIGITAL_VOLUME_2R, WM2200_IN2L_MUTE_SHIFT, 1, 1),
-SOC_DOUBLE_R("IN3 Digital Switch", WM2200_ADC_DIGITAL_VOLUME_1L,
+SOC_DOUBLE_R("IN3 Digital Switch", WM2200_ADC_DIGITAL_VOLUME_3L,
 	     WM2200_ADC_DIGITAL_VOLUME_3R, WM2200_IN3L_MUTE_SHIFT, 1, 1),
 
 SOC_DOUBLE_R_TLV("IN1 Digital Volume", WM2200_ADC_DIGITAL_VOLUME_1L,
-- 
1.8.1.2

[PATCH 028/139] tty: set_termios/set_termiox should not return -EINTR

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Oleg Nesterov <oleg@redhat.com>

commit 183d95cdd834381c594d3aa801c1f9f9c0c54fa9 upstream.

See https://bugzilla.redhat.com/show_bug.cgi?id=904907
read command causes bash to abort with double free or corruption (out).

A simple test-case from Roman:

	// Compile the reproducer and send sigchld ti that process.
	// EINTR occurs even if SA_RESTART flag is set.

	void handler(int sig)
	{
	}

	main()
	{
	  struct sigaction act;
	  act.sa_handler = handler;
	  act.sa_flags = SA_RESTART;
	  sigaction (SIGCHLD, &act, 0);
	  struct termio ttp;
	  ioctl(0, TCGETA, &ttp);
	  while(1)
	  {
	    if (ioctl(0, TCSETAW, ttp) < 0)
	      {
		if (errno == EINTR)
		{
		  fprintf(stderr, "BUG!"); return(1);
		}
	      }
	  }
	}

Change set_termios/set_termiox to return -ERESTARTSYS to fix this
particular problem.

I didn't dare to change other EINTR's in drivers/tty/, but they look
equally wrong.

Reported-by: Roman Rakus <rrakus@redhat.com>
Reported-by: Lingzhu Xiang <lxiang@redhat.com>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/tty/tty_ioctl.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/tty/tty_ioctl.c b/drivers/tty/tty_ioctl.c
index a1b9a2f..f8d03da 100644
--- a/drivers/tty/tty_ioctl.c
+++ b/drivers/tty/tty_ioctl.c
@@ -617,7 +617,7 @@ static int set_termios(struct tty_struct *tty, void __user *arg, int opt)
 	if (opt & TERMIOS_WAIT) {
 		tty_wait_until_sent(tty, 0);
 		if (signal_pending(current))
-			return -EINTR;
+			return -ERESTARTSYS;
 	}
 
 	tty_set_termios(tty, &tmp_termios);
@@ -684,7 +684,7 @@ static int set_termiox(struct tty_struct *tty, void __user *arg, int opt)
 	if (opt & TERMIOS_WAIT) {
 		tty_wait_until_sent(tty, 0);
 		if (signal_pending(current))
-			return -EINTR;
+			return -ERESTARTSYS;
 	}
 
 	mutex_lock(&tty->termios_mutex);
-- 
1.8.1.2

[PATCH 029/139] ARM: i.MX25: clk: parent per5_clk to AHB clock

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Steffen Trumtrar <s.trumtrar@pengutronix.de>

commit 4b526ca5f627188425184a22ed46c91baa602d43 upstream.

The mxc-timer on the imx25 needs to be derived from the AHB clock.
If a bootloader reparents this clock to the ipg_clk_highfreq, which according
to the datasheet is a valid operation, the system can/will produce lockups/
freezes after some time [1].

This can be forced with code like
	while(1)
                syscall(SYS_clock_gettime, CLOCK_REALTIME, &tp);

This was already fixed with the commit
	"i.MX25 GPT clock fix: ensure correct the clock source" [2],
for 3.1-rc2, but was lost, when i.MX was converted to the common clock framework
("ARM i.MX25: implement clocks using common clock framework") [3]

[1]: http://lists.arm.linux.org.uk/lurker/message/20130129.161230.229bda17.en.html
[2]: 2012d9ca2a1381ae3e733330a7f0d1d2f1988bba
[3]: 6bbaec5676e4f475b0d78743cbd4c70a8804ce14

Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
[ luis: adjust context ]
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 arch/arm/mach-imx/clk-imx25.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/arm/mach-imx/clk-imx25.c b/arch/arm/mach-imx/clk-imx25.c
index 4431a62..ec376d3 100644
--- a/arch/arm/mach-imx/clk-imx25.c
+++ b/arch/arm/mach-imx/clk-imx25.c
@@ -241,6 +241,9 @@ int __init mx25_clocks_init(void)
 	clk_register_clkdev(clk[sdma_ahb], "ahb", "imx35-sdma");
 	clk_register_clkdev(clk[iim_ipg], "iim", NULL);
 
+	/* Clock source for gpt must be derived from AHB */
+	clk_set_parent(clk[per5_sel], clk[ahb]);
+
 	mxc_timer_init(MX25_IO_ADDRESS(MX25_GPT1_BASE_ADDR), 54);
 	return 0;
 }
-- 
1.8.1.2

[PATCH 030/139] hrtimer: Prevent hrtimer_enqueue_reprogram race

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Leonid Shatz <leonid.shatz@ravellosystems.com>

commit b22affe0aef429d657bc6505aacb1c569340ddd2 upstream.

hrtimer_enqueue_reprogram contains a race which could result in
timer.base switch during unlock/lock sequence.

hrtimer_enqueue_reprogram is releasing the lock protecting the timer
base for calling raise_softirq_irqsoff() due to a lock ordering issue
versus rq->lock.

If during that time another CPU calls __hrtimer_start_range_ns() on
the same hrtimer, the timer base might switch, before the current CPU
can lock base->lock again and therefor the unlock_timer_base() call
will unlock the wrong lock.

[ tglx: Added comment and massaged changelog ]

Signed-off-by: Leonid Shatz <leonid.shatz@ravellosystems.com>
Signed-off-by: Izik Eidus <izik.eidus@ravellosystems.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Link: http://lkml.kernel.org/r/1359981217-389-1-git-send-email-izik.eidus@ravellosystems.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 kernel/hrtimer.c | 36 ++++++++++++++++++------------------
 1 file changed, 18 insertions(+), 18 deletions(-)

diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c
index 6db7a5e..cdd5607 100644
--- a/kernel/hrtimer.c
+++ b/kernel/hrtimer.c
@@ -640,21 +640,9 @@ static inline void hrtimer_init_hres(struct hrtimer_cpu_base *base)
  * and expiry check is done in the hrtimer_interrupt or in the softirq.
  */
 static inline int hrtimer_enqueue_reprogram(struct hrtimer *timer,
-					    struct hrtimer_clock_base *base,
-					    int wakeup)
+					    struct hrtimer_clock_base *base)
 {
-	if (base->cpu_base->hres_active && hrtimer_reprogram(timer, base)) {
-		if (wakeup) {
-			raw_spin_unlock(&base->cpu_base->lock);
-			raise_softirq_irqoff(HRTIMER_SOFTIRQ);
-			raw_spin_lock(&base->cpu_base->lock);
-		} else
-			__raise_softirq_irqoff(HRTIMER_SOFTIRQ);
-
-		return 1;
-	}
-
-	return 0;
+	return base->cpu_base->hres_active && hrtimer_reprogram(timer, base);
 }
 
 static inline ktime_t hrtimer_update_base(struct hrtimer_cpu_base *base)
@@ -735,8 +723,7 @@ static inline int hrtimer_switch_to_hres(void) { return 0; }
 static inline void
 hrtimer_force_reprogram(struct hrtimer_cpu_base *base, int skip_equal) { }
 static inline int hrtimer_enqueue_reprogram(struct hrtimer *timer,
-					    struct hrtimer_clock_base *base,
-					    int wakeup)
+					    struct hrtimer_clock_base *base)
 {
 	return 0;
 }
@@ -995,8 +982,21 @@ int __hrtimer_start_range_ns(struct hrtimer *timer, ktime_t tim,
 	 *
 	 * XXX send_remote_softirq() ?
 	 */
-	if (leftmost && new_base->cpu_base == &__get_cpu_var(hrtimer_bases))
-		hrtimer_enqueue_reprogram(timer, new_base, wakeup);
+	if (leftmost && new_base->cpu_base == &__get_cpu_var(hrtimer_bases)
+		&& hrtimer_enqueue_reprogram(timer, new_base)) {
+		if (wakeup) {
+			/*
+			 * We need to drop cpu_base->lock to avoid a
+			 * lock ordering issue vs. rq->lock.
+			 */
+			raw_spin_unlock(&new_base->cpu_base->lock);
+			raise_softirq_irqoff(HRTIMER_SOFTIRQ);
+			local_irq_restore(flags);
+			return ret;
+		} else {
+			__raise_softirq_irqoff(HRTIMER_SOFTIRQ);
+		}
+	}
 
 	unlock_hrtimer_base(timer, &flags);
 
-- 
1.8.1.2

[PATCH 031/139] staging: comedi: check s->async for poll(), read() and write()

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Ian Abbott <abbotti@mev.co.uk>

commit cc400e185c07c15a42d2635995f422de5b94b696 upstream.

Some low-level comedi drivers (incorrectly) point `dev->read_subdev` or
`dev->write_subdev` to a subdevice that does not support asynchronous
commands.  Comedi's poll(), read() and write() file operation handlers
assume these subdevices do support asynchronous commands.  In
particular, they assume `s->async` is valid (where `s` points to the
read or write subdevice), which it won't be if it has been set
incorrectly.  This can lead to a NULL pointer dereference.

Check `s->async` is non-NULL in `comedi_poll()`, `comedi_read()` and
`comedi_write()` to avoid the bug.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[ luis: adjust context, variables names ]
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/staging/comedi/comedi_fops.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/staging/comedi/comedi_fops.c b/drivers/staging/comedi/comedi_fops.c
index 2831080..b08cbbe 100644
--- a/drivers/staging/comedi/comedi_fops.c
+++ b/drivers/staging/comedi/comedi_fops.c
@@ -1866,7 +1866,7 @@ static unsigned int comedi_poll(struct file *file, poll_table *wait)
 
 	mask = 0;
 	read_subdev = comedi_get_read_subdevice(dev_file_info);
-	if (read_subdev) {
+	if (read_subdev && read_subdev->async) {
 		poll_wait(file, &read_subdev->async->wait_head, wait);
 		if (!read_subdev->busy
 		    || comedi_buf_read_n_available(read_subdev->async) > 0
@@ -1876,7 +1876,7 @@ static unsigned int comedi_poll(struct file *file, poll_table *wait)
 		}
 	}
 	write_subdev = comedi_get_write_subdevice(dev_file_info);
-	if (write_subdev) {
+	if (write_subdev && write_subdev->async) {
 		poll_wait(file, &write_subdev->async->wait_head, wait);
 		comedi_buf_write_alloc(write_subdev->async,
 				       write_subdev->async->prealloc_bufsz);
@@ -1918,7 +1918,7 @@ static ssize_t comedi_write(struct file *file, const char __user *buf,
 	}
 
 	s = comedi_get_write_subdevice(dev_file_info);
-	if (s == NULL) {
+	if (!s || !s->async) {
 		retval = -EIO;
 		goto done;
 	}
@@ -2029,7 +2029,7 @@ static ssize_t comedi_read(struct file *file, char __user *buf, size_t nbytes,
 	}
 
 	s = comedi_get_read_subdevice(dev_file_info);
-	if (s == NULL) {
+	if (!s || !s->async) {
 		retval = -EIO;
 		goto done;
 	}
-- 
1.8.1.2

[PATCH 032/139] ACPI: Add DMI entry for Sony VGN-FW41E_H

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Joseph Salisbury <joseph.salisbury@canonical.com>

commit 66f2fda93b67fa744d406e6dcf443f67bac204b6 upstream.

This patch adds a quirk to allow the Sony VGN-FW41E_H to suspend/resume
properly.

References: http://bugs.launchpad.net/bugs/1113547
Signed-off-by: Joseph Salisbury <joseph.salisbury@canonical.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/acpi/sleep.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c
index b89f683..e3d5125 100644
--- a/drivers/acpi/sleep.c
+++ b/drivers/acpi/sleep.c
@@ -185,6 +185,14 @@ static struct dmi_system_id __initdata acpisleep_dmi_table[] = {
 	},
 	{
 	.callback = init_nvs_nosave,
+	.ident = "Sony Vaio VGN-FW41E_H",
+	.matches = {
+		DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
+		DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW41E_H"),
+		},
+	},
+	{
+	.callback = init_nvs_nosave,
 	.ident = "Sony Vaio VGN-FW21E",
 	.matches = {
 		DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
-- 
1.8.1.2

[PATCH 033/139] timeconst.pl: Eliminate Perl warning

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: "H. Peter Anvin" <hpa@linux.intel.com>

commit 63a3f603413ffe82ad775f2d62a5afff87fd94a0 upstream.

defined(@array) is deprecated in Perl and gives off a warning.
Restructure the code to remove that warning.

[ hpa: it would be interesting to revert to the timeconst.bc script.
  It appears that the failures reported by akpm during testing of
  that script was due to a known broken version of make, not a problem
  with bc.  The Makefile rules could probably be restructured to avoid
  the make bug, or it is probably old enough that it doesn't matter. ]

Reported-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 kernel/timeconst.pl | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/kernel/timeconst.pl b/kernel/timeconst.pl
index eb51d76..3f42652 100644
--- a/kernel/timeconst.pl
+++ b/kernel/timeconst.pl
@@ -369,10 +369,8 @@ if ($hz eq '--can') {
 		die "Usage: $0 HZ\n";
 	}
 
-	@val = @{$canned_values{$hz}};
-	if (!defined(@val)) {
-		@val = compute_values($hz);
-	}
+	$cv = $canned_values{$hz};
+	@val = defined($cv) ? @$cv : compute_values($hz);
 	output($hz, @val);
 }
 exit 0;
-- 
1.8.1.2

[PATCH 034/139] p54usb: corrected USB ID for T-Com Sinus 154 data II

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Tomasz Guszkowski <tsg@o2.pl>

commit 008e33f733ca51acb2dd9d88ea878693b04d1d2a upstream.

Corrected USB ID for T-Com Sinus 154 data II. ISL3887-based. The
device was tested in managed mode with no security, WEP 128
bit and WPA-PSK (TKIP) with firmware 2.13.1.0.lm87.arm (md5sum:
7d676323ac60d6e1a3b6d61e8c528248). It works.

Signed-off-by: Tomasz Guszkowski <tsg@o2.pl>
Acked-By: Christian Lamparter <chunkeey@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/net/wireless/p54/p54usb.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/p54/p54usb.c b/drivers/net/wireless/p54/p54usb.c
index 4191294..3d4dd4d 100644
--- a/drivers/net/wireless/p54/p54usb.c
+++ b/drivers/net/wireless/p54/p54usb.c
@@ -84,8 +84,8 @@ static struct usb_device_id p54u_table[] = {
 	{USB_DEVICE(0x06b9, 0x0121)},	/* Thomson SpeedTouch 121g */
 	{USB_DEVICE(0x0707, 0xee13)},   /* SMC 2862W-G version 2 */
 	{USB_DEVICE(0x0803, 0x4310)},	/* Zoom 4410a */
-	{USB_DEVICE(0x083a, 0x4503)},	/* T-Com Sinus 154 data II */
 	{USB_DEVICE(0x083a, 0x4521)},   /* Siemens Gigaset USB Adapter 54 version 2 */
+	{USB_DEVICE(0x083a, 0x4531)},	/* T-Com Sinus 154 data II */
 	{USB_DEVICE(0x083a, 0xc501)},	/* Zoom Wireless-G 4410 */
 	{USB_DEVICE(0x083a, 0xf503)},	/* Accton FD7050E ver 1010ec  */
 	{USB_DEVICE(0x0846, 0x4240)},	/* Netgear WG111 (v2) */
-- 
1.8.1.2

[PATCH 035/139] rtlwifi: rtl8192cu: Fix NULL dereference BUG when using new_id

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Larry Finger <Larry.Finger@lwfinger.net>

commit 957f4aca5fa0db69635271bc4621cc0b65b2d590 upstream.

When the new_id entry in /sysfs is used for a foreign USB device, rtlwifi
BUGS with a NULL pointer dereference because the per-driver configuration
data is not available. The probe function has been restructured as
suggested by Ben Hutchings <bhutchings@solarflare.com>.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
[ luis: adjust context ]
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/net/wireless/rtlwifi/rtl8192cu/sw.c | 8 +++++++-
 drivers/net/wireless/rtlwifi/usb.c          | 5 +++--
 drivers/net/wireless/rtlwifi/usb.h          | 3 ++-
 3 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/drivers/net/wireless/rtlwifi/rtl8192cu/sw.c b/drivers/net/wireless/rtlwifi/rtl8192cu/sw.c
index b7e6607..6f4f9aa 100644
--- a/drivers/net/wireless/rtlwifi/rtl8192cu/sw.c
+++ b/drivers/net/wireless/rtlwifi/rtl8192cu/sw.c
@@ -363,9 +363,15 @@ static struct usb_device_id rtl8192c_usb_ids[] = {
 
 MODULE_DEVICE_TABLE(usb, rtl8192c_usb_ids);
 
+static int rtl8192cu_probe(struct usb_interface *intf,
+			   const struct usb_device_id *id)
+{
+	return rtl_usb_probe(intf, id, &rtl92cu_hal_cfg);
+}
+
 static struct usb_driver rtl8192cu_driver = {
 	.name = "rtl8192cu",
-	.probe = rtl_usb_probe,
+	.probe = rtl8192cu_probe,
 	.disconnect = rtl_usb_disconnect,
 	.id_table = rtl8192c_usb_ids,
 
diff --git a/drivers/net/wireless/rtlwifi/usb.c b/drivers/net/wireless/rtlwifi/usb.c
index 17cd028..c03a018 100644
--- a/drivers/net/wireless/rtlwifi/usb.c
+++ b/drivers/net/wireless/rtlwifi/usb.c
@@ -935,7 +935,8 @@ static struct rtl_intf_ops rtl_usb_ops = {
 };
 
 int __devinit rtl_usb_probe(struct usb_interface *intf,
-			const struct usb_device_id *id)
+			    const struct usb_device_id *id,
+			    struct rtl_hal_cfg *rtl_hal_cfg)
 {
 	int err;
 	struct ieee80211_hw *hw = NULL;
@@ -970,7 +971,7 @@ int __devinit rtl_usb_probe(struct usb_interface *intf,
 	usb_set_intfdata(intf, hw);
 	/* init cfg & intf_ops */
 	rtlpriv->rtlhal.interface = INTF_USB;
-	rtlpriv->cfg = (struct rtl_hal_cfg *)(id->driver_info);
+	rtlpriv->cfg = rtl_hal_cfg;
 	rtlpriv->intf_ops = &rtl_usb_ops;
 	rtl_dbgp_flag_init(hw);
 	/* Init IO handler */
diff --git a/drivers/net/wireless/rtlwifi/usb.h b/drivers/net/wireless/rtlwifi/usb.h
index 43846b3..b1a9cb2 100644
--- a/drivers/net/wireless/rtlwifi/usb.h
+++ b/drivers/net/wireless/rtlwifi/usb.h
@@ -157,7 +157,8 @@ struct rtl_usb_priv {
 
 
 int __devinit rtl_usb_probe(struct usb_interface *intf,
-			    const struct usb_device_id *id);
+			    const struct usb_device_id *id,
+			    struct rtl_hal_cfg *rtl92cu_hal_cfg);
 void rtl_usb_disconnect(struct usb_interface *intf);
 int rtl_usb_suspend(struct usb_interface *pusb_intf, pm_message_t message);
 int rtl_usb_resume(struct usb_interface *pusb_intf);
-- 
1.8.1.2

[PATCH 036/139] rtlwifi: rtl8192cu: Add new USB ID

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Larry Finger <Larry.Finger@lwfinger.net>

commit 8708aac79e4572ba673d7a21e94ddca9f3abb7fc upstream.

A new model of the RTL8188CUS has appeared.

Reported-and-tested-by: Thomas Rosenkrantz <tom.rosary@googlemail.com>
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/net/wireless/rtlwifi/rtl8192cu/sw.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/wireless/rtlwifi/rtl8192cu/sw.c b/drivers/net/wireless/rtlwifi/rtl8192cu/sw.c
index 6f4f9aa..b450931 100644
--- a/drivers/net/wireless/rtlwifi/rtl8192cu/sw.c
+++ b/drivers/net/wireless/rtlwifi/rtl8192cu/sw.c
@@ -285,6 +285,7 @@ static struct usb_device_id rtl8192c_usb_ids[] = {
 	{RTL_USB_DEVICE(USB_VENDER_ID_REALTEK, 0x817f, rtl92cu_hal_cfg)},
 	/* RTL8188CUS-VL */
 	{RTL_USB_DEVICE(USB_VENDER_ID_REALTEK, 0x818a, rtl92cu_hal_cfg)},
+	{RTL_USB_DEVICE(USB_VENDER_ID_REALTEK, 0x819a, rtl92cu_hal_cfg)},
 	/* 8188 Combo for BC4 */
 	{RTL_USB_DEVICE(USB_VENDER_ID_REALTEK, 0x8754, rtl92cu_hal_cfg)},
 
-- 
1.8.1.2

[PATCH 037/139] USB: storage: properly handle the endian issues of idProduct

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: fangxiaozhi <huananhu@huawei.com>

commit cd060956c5e97931c3909e4a808508469c0bb9f6 upstream.

1. The idProduct is little endian, so make sure its value to be
compatible with the current CPU. Make no break on big endian processors.

Signed-off-by: fangxiaozhi <huananhu@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/usb/storage/initializers.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/storage/initializers.c b/drivers/usb/storage/initializers.c
index 16b0bf0..7ab9046 100644
--- a/drivers/usb/storage/initializers.c
+++ b/drivers/usb/storage/initializers.c
@@ -147,7 +147,7 @@ static int usb_stor_huawei_dongles_pid(struct us_data *us)
 	int idProduct;
 
 	idesc = &us->pusb_intf->cur_altsetting->desc;
-	idProduct = us->pusb_dev->descriptor.idProduct;
+	idProduct = le16_to_cpu(us->pusb_dev->descriptor.idProduct);
 	/* The first port is CDROM,
 	 * means the dongle in the single port mode,
 	 * and a switch command is required to be sent. */
@@ -169,7 +169,7 @@ int usb_stor_huawei_init(struct us_data *us)
 	int result = 0;
 
 	if (usb_stor_huawei_dongles_pid(us)) {
-		if (us->pusb_dev->descriptor.idProduct >= 0x1446)
+		if (le16_to_cpu(us->pusb_dev->descriptor.idProduct) >= 0x1446)
 			result = usb_stor_huawei_scsi_init(us);
 		else
 			result = usb_stor_huawei_feature_init(us);
-- 
1.8.1.2

[PATCH 038/139] ALSA: rme32.c irq enabling after spin_lock_irq

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Denis Efremov <yefremov.denis@gmail.com>

commit f49a59c4471d81a233e09dda45187cc44fda009d upstream.

According to the other code in this driver and similar
code in rme96 it seems, that spin_lock_irq in
snd_rme32_capture_close function should be paired
with spin_unlock_irq.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Denis Efremov <yefremov.denis@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 sound/pci/rme32.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/pci/rme32.c b/sound/pci/rme32.c
index 46b3629..f1dec07 100644
--- a/sound/pci/rme32.c
+++ b/sound/pci/rme32.c
@@ -1017,7 +1017,7 @@ static int snd_rme32_capture_close(struct snd_pcm_substream *substream)
 	spin_lock_irq(&rme32->lock);
 	rme32->capture_substream = NULL;
 	rme32->capture_periodsize = 0;
-	spin_unlock(&rme32->lock);
+	spin_unlock_irq(&rme32->lock);
 	return 0;
 }
 
-- 
1.8.1.2

[PATCH 039/139] ALSA: ali5451: remove irq enabling in pointer callback

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Denis Efremov <yefremov.denis@gmail.com>

commit dacae5a19b4cbe1b5e3a86de23ea74cbe9ec9652 upstream.

snd_ali_pointer function is called with local
interrupts disabled. However it seems very strange to
reenable them in such way.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Denis Efremov <yefremov.denis@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 sound/pci/ali5451/ali5451.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/pci/ali5451/ali5451.c b/sound/pci/ali5451/ali5451.c
index 9dfc27b..2c4dd6b 100644
--- a/sound/pci/ali5451/ali5451.c
+++ b/sound/pci/ali5451/ali5451.c
@@ -1435,7 +1435,7 @@ static snd_pcm_uframes_t snd_ali_pointer(struct snd_pcm_substream *substream)
 
 	spin_lock(&codec->reg_lock);
 	if (!pvoice->running) {
-		spin_unlock_irq(&codec->reg_lock);
+		spin_unlock(&codec->reg_lock);
 		return 0;
 	}
 	outb(pvoice->number, ALI_REG(codec, ALI_GC_CIR));
-- 
1.8.1.2

[PATCH 040/139] ARM: 7643/1: sched: correct update_sched_clock()

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Joonsoo Kim <js1304@gmail.com>

commit 7c4e9ced424be4d36df6a3e3825763e97ee97607 upstream.

If we want load epoch_cyc and epoch_ns atomically,
we should update epoch_cyc_copy first of all.
This notify reader that updating is in progress.

If we update epoch_cyc first like as current implementation,
there is subtle error case.
Look at the below example.

<Initial Condition>
cyc = 9
ns = 900
cyc_copy = 9

== CASE 1 ==
<CPU A = reader>           <CPU B = updater>
                           write cyc = 10
read cyc = 10
read ns = 900
                           write ns = 1000
                           write cyc_copy = 10
read cyc_copy = 10

output = (10, 900)

== CASE 2 ==
<CPU A = reader>           <CPU B = updater>
read cyc = 9
                           write cyc = 10
                           write ns = 1000
read ns = 1000
read cyc_copy = 9
                           write cyc_copy = 10
output = (9, 1000)

If atomic read is ensured, output should be (9, 900) or (10, 1000).
But, output in example case are not.

So, change updating sequence in order to correct this problem.

Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 arch/arm/kernel/sched_clock.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm/kernel/sched_clock.c b/arch/arm/kernel/sched_clock.c
index 27d186a..6bbf936 100644
--- a/arch/arm/kernel/sched_clock.c
+++ b/arch/arm/kernel/sched_clock.c
@@ -84,11 +84,11 @@ static void notrace update_sched_clock(void)
 	 * detectable in cyc_to_fixed_sched_clock().
 	 */
 	raw_local_irq_save(flags);
-	cd.epoch_cyc = cyc;
+	cd.epoch_cyc_copy = cyc;
 	smp_wmb();
 	cd.epoch_ns = ns;
 	smp_wmb();
-	cd.epoch_cyc_copy = cyc;
+	cd.epoch_cyc = cyc;
 	raw_local_irq_restore(flags);
 }
 
-- 
1.8.1.2

[PATCH 041/139] ALSA: hda - Workaround for silent output on Sony Vaio VGC-LN51JGB with ALC889

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: =?UTF-8?q?Fernando=20Luis=20V=C3=A1zquez=20Cao?=

commit 12e31a78c70dc12897fda2489113f445c0e94a18 upstream.

Some Vaio all-in-one desktop PCs (for example VGC-LN51JGB) are affected by
the same issue that caused Vaio Z laptops to become silent: the speaker pin
must be connected to the first DAC even though the codec itself advertises
flexible routing through any of the DACs.

Use the no-primary-hp fixup for choosing the speaker pin as the primary so
that the right DAC is assigned on this device.

Signed-off-by: Fernando Luis Vazquez Cao <fernando@oss.ntt.co.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 sound/pci/hda/patch_realtek.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index ff6f2e6..a351a6f 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -5270,6 +5270,7 @@ static const struct snd_pci_quirk alc882_fixup_tbl[] = {
 	SND_PCI_QUIRK(0x1043, 0x835f, "Asus Eee 1601", ALC888_FIXUP_EEE1601),
 	SND_PCI_QUIRK(0x104d, 0x9047, "Sony Vaio TT", ALC889_FIXUP_VAIO_TT),
 	SND_PCI_QUIRK(0x104d, 0x905a, "Sony Vaio Z", ALC882_FIXUP_NO_PRIMARY_HP),
+	SND_PCI_QUIRK(0x104d, 0x9043, "Sony Vaio VGC-LN51JGB", ALC882_FIXUP_NO_PRIMARY_HP),
 
 	/* All Apple entries are in codec SSIDs */
 	SND_PCI_QUIRK(0x106b, 0x00a0, "MacBookPro 3,1", ALC889_FIXUP_MBP_VREF),
-- 
1.8.1.2

[PATCH 042/139] x86: Hyper-V: register clocksource only if its advertised

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Olaf Hering <[mailto:olaf@aepfle.de]>

commit 32068f6527b8f1822a30671dedaf59c567325026 upstream.

Enable hyperv_clocksource only if its advertised as a feature.
XenServer 6 returns the signature which is checked in
ms_hyperv_platform(), but it does not offer all features. Currently the
clocksource is enabled unconditionally in ms_hyperv_init_platform(), and
the result is a hanging guest.

Hyper-V spec Bit 1 indicates the availability of Partition Reference
Counter.  Register the clocksource only if this bit is set.

The guest in question prints this in dmesg:
 [    0.000000] Hypervisor detected: Microsoft HyperV
 [    0.000000] HyperV: features 0x70, hints 0x0

This bug can be reproduced easily be setting 'viridian=1' in a HVM domU
.cfg file. A workaround without this patch is to boot the HVM guest with
'clocksource=jiffies'.

Signed-off-by: Olaf Hering <olaf@aepfle.de>
Link: http://lkml.kernel.org/r/1359940959-32168-1-git-send-email-kys@microsoft.com
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Cc: Greg KH <gregkh@linuxfoundation.org>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 arch/x86/kernel/cpu/mshyperv.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c
index 0a630dd..646d192 100644
--- a/arch/x86/kernel/cpu/mshyperv.c
+++ b/arch/x86/kernel/cpu/mshyperv.c
@@ -68,7 +68,8 @@ static void __init ms_hyperv_init_platform(void)
 	printk(KERN_INFO "HyperV: features 0x%x, hints 0x%x\n",
 	       ms_hyperv.features, ms_hyperv.hints);
 
-	clocksource_register_hz(&hyperv_cs, NSEC_PER_SEC/100);
+	if (ms_hyperv.features & HV_X64_MSR_TIME_REF_COUNT_AVAILABLE)
+		clocksource_register_hz(&hyperv_cs, NSEC_PER_SEC/100);
 }
 
 const __refconst struct hypervisor_x86 x86_hyper_ms_hyperv = {
-- 
1.8.1.2

[PATCH 043/139] USB: option: add Yota / Megafon M100-1 4g modem

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: =?UTF-8?q?Bj=C3=B8rn=20Mork?= <bjorn@mork.no>

commit cd565279e51bedee1b2988e84f9b3bef485adeb6 upstream.

Interface layout:

 00 CD-ROM
 01 debug COM port
 02 AP control port
 03 modem
 04 usb-ethernet

Bus=01 Lev=02 Prnt=02 Port=01 Cnt=02 Dev#=  4 Spd=480  MxCh= 0
D:  Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=0408 ProdID=ea42 Rev= 0.00
S:  Manufacturer=Qualcomm, Incorporated
S:  Product=Qualcomm CDMA Technologies MSM
S:  SerialNumber=353568051xxxxxx
C:* #Ifs= 5 Cfg#= 1 Atr=e0 MxPwr=500mA
I:* If#= 0 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=usb-storage
E:  Ad=01(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I:* If#= 1 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none)
E:  Ad=82(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=4ms
I:* If#= 2 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none)
E:  Ad=83(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=03(O) Atr=02(Bulk) MxPS= 512 Ivl=4ms
I:* If#= 3 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none)
E:  Ad=84(I) Atr=03(Int.) MxPS=  64 Ivl=2ms
E:  Ad=85(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=04(O) Atr=02(Bulk) MxPS= 512 Ivl=4ms
I:* If#= 4 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none)
E:  Ad=86(I) Atr=03(Int.) MxPS=  64 Ivl=2ms
E:  Ad=87(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=05(O) Atr=02(Bulk) MxPS= 512 Ivl=4ms

Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/usb/serial/option.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/usb/serial/option.c b/drivers/usb/serial/option.c
index b5fd2f8..3e5c9fe 100644
--- a/drivers/usb/serial/option.c
+++ b/drivers/usb/serial/option.c
@@ -576,6 +576,8 @@ static const struct usb_device_id option_ids[] = {
 	{ USB_DEVICE(QUANTA_VENDOR_ID, QUANTA_PRODUCT_GLX) },
 	{ USB_DEVICE(QUANTA_VENDOR_ID, QUANTA_PRODUCT_GKE) },
 	{ USB_DEVICE(QUANTA_VENDOR_ID, QUANTA_PRODUCT_GLE) },
+	{ USB_DEVICE(QUANTA_VENDOR_ID, 0xea42),
+		.driver_info = (kernel_ulong_t)&net_intf4_blacklist },
 	{ USB_DEVICE_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_E173, 0xff, 0xff, 0xff),
 		.driver_info = (kernel_ulong_t) &net_intf1_blacklist },
 	{ USB_DEVICE_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_K4505, 0xff, 0xff, 0xff),
-- 
1.8.1.2

[PATCH 044/139] USB: serial: fix null-pointer dereferences on disconnect

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Johan Hovold <jhovold@gmail.com>

commit b2ca699076573c94fee9a73cb0d8645383b602a0 upstream.

Make sure serial-driver dtr_rts is called with disc_mutex held after
checking the disconnected flag.

Due to a bug in the tty layer, dtr_rts may get called after a device has
been disconnected and the tty-device unregistered. Some drivers have had
individual checks for disconnect to make sure the disconnected interface
was not accessed, but this should really be handled in usb-serial core
(at least until the long-standing tty-bug has been fixed).

Note that the problem has been made more acute with commit 0998d0631001
("device-core: Ensure drvdata = NULL when no driver is bound") as the
port data is now also NULL when dtr_rts is called resulting in further
oopses.

Reported-by: Chris Ruehl <chris.ruehl@gtsys.com.hk>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[ luis: adjust context ]
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/usb/serial/ftdi_sio.c   | 20 +++++++++-----------
 drivers/usb/serial/mct_u232.c   | 22 +++++++++-------------
 drivers/usb/serial/quatech2.c   | 18 ++++++++----------
 drivers/usb/serial/sierra.c     |  8 +-------
 drivers/usb/serial/ssu100.c     | 19 ++++++++-----------
 drivers/usb/serial/usb-serial.c | 14 ++++++++++++--
 drivers/usb/serial/usb_wwan.c   |  8 +++-----
 7 files changed, 50 insertions(+), 59 deletions(-)

diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index 4c1fa24..1f939cb 100644
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -1890,24 +1890,22 @@ static void ftdi_dtr_rts(struct usb_serial_port *port, int on)
 {
 	struct ftdi_private *priv = usb_get_serial_port_data(port);
 
-	mutex_lock(&port->serial->disc_mutex);
-	if (!port->serial->disconnected) {
-		/* Disable flow control */
-		if (!on && usb_control_msg(port->serial->dev,
+	/* Disable flow control */
+	if (!on) {
+		if (usb_control_msg(port->serial->dev,
 			    usb_sndctrlpipe(port->serial->dev, 0),
 			    FTDI_SIO_SET_FLOW_CTRL_REQUEST,
 			    FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
 			    0, priv->interface, NULL, 0,
 			    WDR_TIMEOUT) < 0) {
-			    dev_err(&port->dev, "error from flowcontrol urb\n");
+			dev_err(&port->dev, "error from flowcontrol urb\n");
 		}
-		/* drop RTS and DTR */
-		if (on)
-			set_mctrl(port, TIOCM_DTR | TIOCM_RTS);
-		else
-			clear_mctrl(port, TIOCM_DTR | TIOCM_RTS);
 	}
-	mutex_unlock(&port->serial->disc_mutex);
+	/* drop RTS and DTR */
+	if (on)
+		set_mctrl(port, TIOCM_DTR | TIOCM_RTS);
+	else
+		clear_mctrl(port, TIOCM_DTR | TIOCM_RTS);
 }
 
 /*
diff --git a/drivers/usb/serial/mct_u232.c b/drivers/usb/serial/mct_u232.c
index d06130d..66b91d5 100644
--- a/drivers/usb/serial/mct_u232.c
+++ b/drivers/usb/serial/mct_u232.c
@@ -502,19 +502,15 @@ static void mct_u232_dtr_rts(struct usb_serial_port *port, int on)
 	unsigned int control_state;
 	struct mct_u232_private *priv = usb_get_serial_port_data(port);
 
-	mutex_lock(&port->serial->disc_mutex);
-	if (!port->serial->disconnected) {
-		/* drop DTR and RTS */
-		spin_lock_irq(&priv->lock);
-		if (on)
-			priv->control_state |= TIOCM_DTR | TIOCM_RTS;
-		else
-			priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS);
-		control_state = priv->control_state;
-		spin_unlock_irq(&priv->lock);
-		mct_u232_set_modem_ctrl(port->serial, control_state);
-	}
-	mutex_unlock(&port->serial->disc_mutex);
+	spin_lock_irq(&priv->lock);
+	if (on)
+		priv->control_state |= TIOCM_DTR | TIOCM_RTS;
+	else
+		priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS);
+	control_state = priv->control_state;
+	spin_unlock_irq(&priv->lock);
+
+	mct_u232_set_modem_ctrl(port, control_state);
 }
 
 static void mct_u232_close(struct usb_serial_port *port)
diff --git a/drivers/usb/serial/quatech2.c b/drivers/usb/serial/quatech2.c
index 09d736a..e1065f8 100644
--- a/drivers/usb/serial/quatech2.c
+++ b/drivers/usb/serial/quatech2.c
@@ -976,19 +976,17 @@ static void qt2_dtr_rts(struct usb_serial_port *port, int on)
 	struct usb_device *dev = port->serial->dev;
 	struct qt2_port_private *port_priv = usb_get_serial_port_data(port);
 
-	mutex_lock(&port->serial->disc_mutex);
-	if (!port->serial->disconnected) {
-		/* Disable flow control */
-		if (!on && qt2_setregister(dev, port_priv->device_port,
+	/* Disable flow control */
+	if (!on) {
+		if (qt2_setregister(dev, port_priv->device_port,
 					   UART_MCR, 0) < 0)
 			dev_warn(&port->dev, "error from flowcontrol urb\n");
-		/* drop RTS and DTR */
-		if (on)
-			update_mctrl(port_priv, TIOCM_DTR | TIOCM_RTS, 0);
-		else
-			update_mctrl(port_priv, 0, TIOCM_DTR | TIOCM_RTS);
 	}
-	mutex_unlock(&port->serial->disc_mutex);
+	/* drop RTS and DTR */
+	if (on)
+		update_mctrl(port_priv, TIOCM_DTR | TIOCM_RTS, 0);
+	else
+		update_mctrl(port_priv, 0, TIOCM_DTR | TIOCM_RTS);
 }
 
 static void qt2_update_msr(struct usb_serial_port *port, unsigned char *ch)
diff --git a/drivers/usb/serial/sierra.c b/drivers/usb/serial/sierra.c
index 6aeddcd..defe6ee 100644
--- a/drivers/usb/serial/sierra.c
+++ b/drivers/usb/serial/sierra.c
@@ -866,19 +866,13 @@ static int sierra_open(struct tty_struct *tty, struct usb_serial_port *port)
 
 static void sierra_dtr_rts(struct usb_serial_port *port, int on)
 {
-	struct usb_serial *serial = port->serial;
 	struct sierra_port_private *portdata;
 
 	portdata = usb_get_serial_port_data(port);
 	portdata->rts_state = on;
 	portdata->dtr_state = on;
 
-	if (serial->dev) {
-		mutex_lock(&serial->disc_mutex);
-		if (!serial->disconnected)
-			sierra_send_setup(port);
-		mutex_unlock(&serial->disc_mutex);
-	}
+	sierra_send_setup(port);
 }
 
 static int sierra_startup(struct usb_serial *serial)
diff --git a/drivers/usb/serial/ssu100.c b/drivers/usb/serial/ssu100.c
index 3fee23b..c4409b1 100644
--- a/drivers/usb/serial/ssu100.c
+++ b/drivers/usb/serial/ssu100.c
@@ -505,19 +505,16 @@ static void ssu100_dtr_rts(struct usb_serial_port *port, int on)
 {
 	struct usb_device *dev = port->serial->dev;
 
-	mutex_lock(&port->serial->disc_mutex);
-	if (!port->serial->disconnected) {
-		/* Disable flow control */
-		if (!on &&
-		    ssu100_setregister(dev, 0, UART_MCR, 0) < 0)
+	/* Disable flow control */
+	if (!on) {
+		if (ssu100_setregister(dev, 0, UART_MCR, 0) < 0)
 			dev_err(&port->dev, "error from flowcontrol urb\n");
-		/* drop RTS and DTR */
-		if (on)
-			set_mctrl(dev, TIOCM_DTR | TIOCM_RTS);
-		else
-			clear_mctrl(dev, TIOCM_DTR | TIOCM_RTS);
 	}
-	mutex_unlock(&port->serial->disc_mutex);
+	/* drop RTS and DTR */
+	if (on)
+		set_mctrl(dev, TIOCM_DTR | TIOCM_RTS);
+	else
+		clear_mctrl(dev, TIOCM_DTR | TIOCM_RTS);
 }
 
 static void ssu100_update_msr(struct usb_serial_port *port, u8 msr)
diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index 667c39c..771adbd 100644
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -688,10 +688,20 @@ static int serial_carrier_raised(struct tty_port *port)
 static void serial_dtr_rts(struct tty_port *port, int on)
 {
 	struct usb_serial_port *p = container_of(port, struct usb_serial_port, port);
-	struct usb_serial_driver *drv = p->serial->type;
+	struct usb_serial *serial = p->serial;
+	struct usb_serial_driver *drv = serial->type;
 
-	if (drv->dtr_rts)
+	if (!drv->dtr_rts)
+		return;
+	/*
+	 * Work-around bug in the tty-layer which can result in dtr_rts
+	 * being called after a disconnect (and tty_unregister_device
+	 * has returned). Remove once bug has been squashed.
+	 */
+	mutex_lock(&serial->disc_mutex);
+	if (!serial->disconnected)
 		drv->dtr_rts(p, on);
+	mutex_unlock(&serial->disc_mutex);
 }
 
 static const struct tty_port_operations serial_port_ops = {
diff --git a/drivers/usb/serial/usb_wwan.c b/drivers/usb/serial/usb_wwan.c
index da28535..25c8ee9 100644
--- a/drivers/usb/serial/usb_wwan.c
+++ b/drivers/usb/serial/usb_wwan.c
@@ -41,7 +41,6 @@ static bool debug;
 
 void usb_wwan_dtr_rts(struct usb_serial_port *port, int on)
 {
-	struct usb_serial *serial = port->serial;
 	struct usb_wwan_port_private *portdata;
 	struct usb_wwan_intf_private *intfdata;
 
@@ -51,12 +50,11 @@ void usb_wwan_dtr_rts(struct usb_serial_port *port, int on)
 		return;
 
 	portdata = usb_get_serial_port_data(port);
-	mutex_lock(&serial->disc_mutex);
+	/* FIXME: locking */
 	portdata->rts_state = on;
 	portdata->dtr_state = on;
-	if (serial->dev)
-		intfdata->send_setup(port);
-	mutex_unlock(&serial->disc_mutex);
+
+	intfdata->send_setup(port);
 }
 EXPORT_SYMBOL(usb_wwan_dtr_rts);
 
-- 
1.8.1.2

[PATCH 045/139] idr: idr_for_each_entry() macro

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Philipp Reisner <philipp.reisner@linbit.com>

commit 9749f30f1a387070e6e8351f35aeb829eacc3ab6 upstream.

Inspired by the list_for_each_entry() macro

Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 include/linux/idr.h | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/include/linux/idr.h b/include/linux/idr.h
index 255491c..52a9da2 100644
--- a/include/linux/idr.h
+++ b/include/linux/idr.h
@@ -152,4 +152,15 @@ void ida_simple_remove(struct ida *ida, unsigned int id);
 
 void __init idr_init_cache(void);
 
+/**
+ * idr_for_each_entry - iterate over an idr's elements of a given type
+ * @idp:     idr handle
+ * @entry:   the type * to use as cursor
+ * @id:      id entry's key
+ */
+#define idr_for_each_entry(idp, entry, id)				\
+	for (id = 0, entry = (typeof(entry))idr_get_next((idp), &(id)); \
+	     entry != NULL;                                             \
+	     ++id, entry = (typeof(entry))idr_get_next((idp), &(id)))
+
 #endif /* __IDR_H__ */
-- 
1.8.1.2

[PATCH 046/139] pps: Add pps_lookup_dev() function

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: George Spelvin <linux@horizon.com>

commit 513b032c98b4b9414aa4e9b4a315cb1bf0380101 upstream.

The PPS serial line discipline wants to attach a PPS device to a tty
without changing the tty code to add a struct pps_device * pointer.

Since the number of PPS devices in a typical system is generally very low
(n=1 is by far the most common), it's practical to search the entire list
of allocated pps devices.  (We capture the timestamp before the lookup,
so the timing isn't affected.)

It is a bit ugly that this function, which is part of the in-kernel
PPS API, has to be in pps.c as opposed to kapi,c, but that's not
something that affects users.

Signed-off-by: George Spelvin <linux@horizon.com>
Acked-by: Rodolfo Giometti <giometti@enneenne.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/pps/pps.c          | 33 +++++++++++++++++++++++++++++++++
 include/linux/pps_kernel.h | 17 ++++++++++++++---
 2 files changed, 47 insertions(+), 3 deletions(-)

diff --git a/drivers/pps/pps.c b/drivers/pps/pps.c
index 98fbe62..c50a556 100644
--- a/drivers/pps/pps.c
+++ b/drivers/pps/pps.c
@@ -350,11 +350,44 @@ free_idr:
 
 void pps_unregister_cdev(struct pps_device *pps)
 {
+	pps->lookup_cookie = NULL;
 	device_destroy(pps_class, pps->dev->devt);
 	cdev_del(&pps->cdev);
 }
 
 /*
+ * Look up a pps device by magic cookie.
+ * The cookie is usually a pointer to some enclosing device, but this
+ * code doesn't care; you should never be dereferencing it.
+ *
+ * This is a bit of a kludge that is currently used only by the PPS
+ * serial line discipline.  It may need to be tweaked when a second user
+ * is found.
+ *
+ * There is no function interface for setting the lookup_cookie field.
+ * It's initialized to NULL when the pps device is created, and if a
+ * client wants to use it, just fill it in afterward.
+ *
+ * The cookie is automatically set to NULL in pps_unregister_source()
+ * so that it will not be used again, even if the pps device cannot
+ * be removed from the idr due to pending references holding the minor
+ * number in use.
+ */
+struct pps_device *pps_lookup_dev(void const *cookie)
+{
+	struct pps_device *pps;
+	unsigned id;
+
+	rcu_read_lock();
+	idr_for_each_entry(&pps_idr, pps, id)
+		if (cookie == pps->lookup_cookie)
+			break;
+	rcu_read_unlock();
+	return pps;
+}
+EXPORT_SYMBOL(pps_lookup_dev);
+
+/*
  * Module stuff
  */
 
diff --git a/include/linux/pps_kernel.h b/include/linux/pps_kernel.h
index 9404854..ce2ab3d 100644
--- a/include/linux/pps_kernel.h
+++ b/include/linux/pps_kernel.h
@@ -43,7 +43,7 @@ struct pps_source_info {
 			int event, void *data);	/* PPS echo function */
 
 	struct module *owner;
-	struct device *dev;
+	struct device *dev;		/* Parent device for device_create */
 };
 
 struct pps_event_time {
@@ -69,6 +69,7 @@ struct pps_device {
 	wait_queue_head_t queue;		/* PPS event queue */
 
 	unsigned int id;			/* PPS source unique ID */
+	void const *lookup_cookie;		/* pps_lookup_dev only */
 	struct cdev cdev;
 	struct device *dev;
 	struct fasync_struct *async_queue;	/* fasync method */
@@ -82,16 +83,26 @@ struct pps_device {
 extern struct device_attribute pps_attrs[];
 
 /*
+ * Internal functions.
+ *
+ * These are not actually part of the exported API, but this is a
+ * convenient header file to put them in.
+ */
+
+extern int pps_register_cdev(struct pps_device *pps);
+extern void pps_unregister_cdev(struct pps_device *pps);
+
+/*
  * Exported functions
  */
 
 extern struct pps_device *pps_register_source(
 		struct pps_source_info *info, int default_params);
 extern void pps_unregister_source(struct pps_device *pps);
-extern int pps_register_cdev(struct pps_device *pps);
-extern void pps_unregister_cdev(struct pps_device *pps);
 extern void pps_event(struct pps_device *pps,
 		struct pps_event_time *ts, int event, void *data);
+/* Look up a pps device by magic cookie */
+struct pps_device *pps_lookup_dev(void const *cookie);
 
 static inline void timespec_to_pps_ktime(struct pps_ktime *kt,
 		struct timespec ts)
-- 
1.8.1.2

[PATCH 047/139] pps: Use pps_lookup_dev to reduce ldisc coupling

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: George Spelvin <linux@horizon.com>

commit 03a7ffe4e542310838bac70ef85acc17536b6d7c upstream.

Now that N_TTY uses tty->disc_data for its private data,
'subclass' ldiscs cannot use ->disc_data for their own private data.
(This is a regression is v3.8-rc1)

Use pps_lookup_dev to associate the tty with the pps source instead.

This fixes a crashing regression in 3.8-rc1.

Signed-off-by: George Spelvin <linux@horizon.com>
Acked-by: Rodolfo Giometti <giometti@enneenne.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/pps/clients/pps-ldisc.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/drivers/pps/clients/pps-ldisc.c b/drivers/pps/clients/pps-ldisc.c
index 79451f2..60cee9e 100644
--- a/drivers/pps/clients/pps-ldisc.c
+++ b/drivers/pps/clients/pps-ldisc.c
@@ -31,7 +31,7 @@
 static void pps_tty_dcd_change(struct tty_struct *tty, unsigned int status,
 				struct pps_event_time *ts)
 {
-	struct pps_device *pps = (struct pps_device *)tty->disc_data;
+	struct pps_device *pps = pps_lookup_dev(tty);
 
 	BUG_ON(pps == NULL);
 
@@ -67,9 +67,9 @@ static int pps_tty_open(struct tty_struct *tty)
 		pr_err("cannot register PPS source \"%s\"\n", info.path);
 		return -ENOMEM;
 	}
-	tty->disc_data = pps;
+	pps->lookup_cookie = tty;
 
-	/* Should open N_TTY ldisc too */
+	/* Now open the base class N_TTY ldisc */
 	ret = alias_n_tty_open(tty);
 	if (ret < 0) {
 		pr_err("cannot open tty ldisc \"%s\"\n", info.path);
@@ -81,7 +81,6 @@ static int pps_tty_open(struct tty_struct *tty)
 	return 0;
 
 err_unregister:
-	tty->disc_data = NULL;
 	pps_unregister_source(pps);
 	return ret;
 }
@@ -90,11 +89,10 @@ static void (*alias_n_tty_close)(struct tty_struct *tty);
 
 static void pps_tty_close(struct tty_struct *tty)
 {
-	struct pps_device *pps = (struct pps_device *)tty->disc_data;
+	struct pps_device *pps = pps_lookup_dev(tty);
 
 	alias_n_tty_close(tty);
 
-	tty->disc_data = NULL;
 	dev_info(pps->dev, "removed\n");
 	pps_unregister_source(pps);
 }
-- 
1.8.1.2

[PATCH 048/139] pps: Fix a use-after free bug when unregistering a source.

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: George Spelvin <linux@horizon.com>

commit d953e0e837e65ecc1ddaa4f9560f7925878a0de6 upstream.

Remove the cdev from the system (with cdev_del) *before* deallocating it
(in pps_device_destruct, called via kobject_put from device_destroy).

Also prevent deallocating a device with open file handles.

A better long-term fix is probably to remove the cdev from the pps_device
entirely, and instead have all devices reference one global cdev.  Then
the deallocation ordering becomes simpler.

But that's more complex and invasive change, so we leave that
for later.

Signed-off-by: George Spelvin <linux@horizon.com>
Acked-by: Rodolfo Giometti <giometti@enneenne.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[ luis: adjust context ]
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/pps/pps.c | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/drivers/pps/pps.c b/drivers/pps/pps.c
index c50a556..f129f4d 100644
--- a/drivers/pps/pps.c
+++ b/drivers/pps/pps.c
@@ -247,12 +247,15 @@ static int pps_cdev_open(struct inode *inode, struct file *file)
 	struct pps_device *pps = container_of(inode->i_cdev,
 						struct pps_device, cdev);
 	file->private_data = pps;
-
+	kobject_get(&pps->dev->kobj);
 	return 0;
 }
 
 static int pps_cdev_release(struct inode *inode, struct file *file)
 {
+	struct pps_device *pps = container_of(inode->i_cdev,
+						struct pps_device, cdev);
+	kobject_put(&pps->dev->kobj);
 	return 0;
 }
 
@@ -274,8 +277,10 @@ static void pps_device_destruct(struct device *dev)
 {
 	struct pps_device *pps = dev_get_drvdata(dev);
 
-	/* release id here to protect others from using it while it's
-	 * still in use */
+	cdev_del(&pps->cdev);
+
+	/* Now we can release the ID for re-use */
+	pr_debug("deallocating pps%d\n", pps->id);
 	mutex_lock(&pps_idr_lock);
 	idr_remove(&pps_idr, pps->id);
 	mutex_unlock(&pps_idr_lock);
@@ -330,6 +335,7 @@ int pps_register_cdev(struct pps_device *pps)
 	if (IS_ERR(pps->dev))
 		goto del_cdev;
 
+	/* Override the release function with our own */
 	pps->dev->release = pps_device_destruct;
 
 	pr_debug("source %s got cdev (%d:%d)\n", pps->info.name,
@@ -350,9 +356,9 @@ free_idr:
 
 void pps_unregister_cdev(struct pps_device *pps)
 {
+	pr_debug("unregistering pps%d\n", pps->id);
 	pps->lookup_cookie = NULL;
 	device_destroy(pps_class, pps->dev->devt);
-	cdev_del(&pps->cdev);
 }
 
 /*
-- 
1.8.1.2

[PATCH 049/139] USB: option: add Huawei "ACM" devices using protocol = vendor

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: =?UTF-8?q?Bj=C3=B8rn=20Mork?= <bjorn@mork.no>

commit 1f3f687722fd9b29a0c2a85b4844e3b2a3585c63 upstream.

The USB device descriptor of one identity presented by a few
Huawei morphing devices have serial functions with class codes
02/02/ff, indicating CDC ACM with a vendor specific protocol. This
combination is often used for MSFT RNDIS functions, and the CDC
ACM class driver will therefore ignore such functions.

The CDC ACM class driver cannot support functions with only 2
endpoints.  The underlying serial functions of these modems are
also believed to be the same as for alternate device identities
already supported by the option driver. Letting the same driver
handle these functions independently of the current identity
ensures consistent handling and user experience.

There is no need to blacklist these devices in the rndis_host
driver. Huawei serial functions will either have only 2 endpoints
or a CDC ACM functional descriptor with bmCapabilities != 0, making
them correctly ignored as "non RNDIS" by that driver.

Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/usb/serial/option.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/usb/serial/option.c b/drivers/usb/serial/option.c
index 3e5c9fe..bbaa45d 100644
--- a/drivers/usb/serial/option.c
+++ b/drivers/usb/serial/option.c
@@ -578,8 +578,12 @@ static const struct usb_device_id option_ids[] = {
 	{ USB_DEVICE(QUANTA_VENDOR_ID, QUANTA_PRODUCT_GLE) },
 	{ USB_DEVICE(QUANTA_VENDOR_ID, 0xea42),
 		.driver_info = (kernel_ulong_t)&net_intf4_blacklist },
+	{ USB_DEVICE_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, 0x1c05, USB_CLASS_COMM, 0x02, 0xff) },
+	{ USB_DEVICE_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, 0x1c23, USB_CLASS_COMM, 0x02, 0xff) },
 	{ USB_DEVICE_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_E173, 0xff, 0xff, 0xff),
 		.driver_info = (kernel_ulong_t) &net_intf1_blacklist },
+	{ USB_DEVICE_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, 0x1441, USB_CLASS_COMM, 0x02, 0xff) },
+	{ USB_DEVICE_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, 0x1442, USB_CLASS_COMM, 0x02, 0xff) },
 	{ USB_DEVICE_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_K4505, 0xff, 0xff, 0xff),
 		.driver_info = (kernel_ulong_t) &huawei_cdc12_blacklist },
 	{ USB_DEVICE_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_K3765, 0xff, 0xff, 0xff),
-- 
1.8.1.2

[PATCH 050/139] ARM: samsung: fix assembly syntax for new gas

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Arnd Bergmann <arnd@arndb.de>

commit 2815774bb38445006074e16251b9ef5123bdc616 upstream.

Recent assembler versions complain about extraneous
whitespace inside [] brackets. This fixes all of
these instances for the samsung platforms. We should
backport this to all kernels that might need to
be built with new binutils.

arch/arm/kernel/entry-armv.S: Assembler messages:
arch/arm/kernel/entry-armv.S:214: Error: ARM register expected -- `ldr r2,[ r6,#(0x10)]'
arch/arm/kernel/entry-armv.S:214: Error: ARM register expected -- `ldr r0,[ r6,#(0x14)]'
arch/arm/kernel/entry-armv.S:430: Error: ARM register expected -- `ldr r2,[ r6,#(0x10)]'
arch/arm/kernel/entry-armv.S:430: Error: ARM register expected -- `ldr r0,[ r6,#(0x14)]'
arch/arm/mach-s3c24xx/sleep-s3c2410.S: Assembler messages:
arch/arm/mach-s3c24xx/sleep-s3c2410.S:48: Error: ARM register expected -- `ldr r7,[ r4 ]'
arch/arm/mach-s3c24xx/sleep-s3c2410.S:49: Error: ARM register expected -- `ldr r8,[ r5 ]'
arch/arm/mach-s3c24xx/sleep-s3c2410.S:50: Error: ARM register expected -- `ldr r9,[ r6 ]'
arch/arm/mach-s3c24xx/sleep-s3c2410.S:64: Error: ARM register expected -- `streq r7,[ r4 ]'
arch/arm/mach-s3c24xx/sleep-s3c2410.S:65: Error: ARM register expected -- `streq r8,[ r5 ]'
arch/arm/mach-s3c24xx/sleep-s3c2410.S:66: Error: ARM register expected -- `streq r9,[ r6 ]'
arch/arm/kernel/debug.S: Assembler messages:
arch/arm/kernel/debug.S:83: Error: ARM register expected -- `ldr r2,[ r2,#((0x0B0)+(((0x56000000)-(0x50000000))+(0xF6000000+(0x01000000))))-((0)+(((0x56000000)-(0x50000000))+(0xF6000000+(0x01000000))))]'
arch/arm/kernel/debug.S:83: Error: ARM register expected -- `ldr r2,[ r3,#(0x18)]'
arch/arm/kernel/debug.S:85: Error: ARM register expected -- `ldr r2,[ r2,#((0x0B0)+(((0x56000000)-(0x50000000))+(0xF6000000+(0x01000000))))-((0)+(((0x56000000)-(0x50000000))+(0xF6000000+(0x01000000))))]'
arch/arm/kernel/debug.S:85: Error: ARM register expected -- `ldr r2,[ r3,#(0x18)]'
arch/arm/mach-s3c24xx/pm-h1940.S: Assembler messages:
arch/arm/mach-s3c24xx/pm-h1940.S:33: Error: ARM register expected -- `ldr pc,[ r0,#((0x0B8)+(((0x56000000)-(0x50000000))+(0xF6000000+(0x01000000))))-(((0x56000000)-(0x50000000))+(0xF6000000+(0x01000000)))]'
arch/arm/mach-s3c24xx/sleep-s3c2412.S: Assembler messages:
arch/arm/mach-s3c24xx/sleep-s3c2412.S:60: Error: ARM register expected -- `ldrne r9,[ r1 ]'
arch/arm/mach-s3c24xx/sleep-s3c2412.S:61: Error: ARM register expected -- `strne r9,[ r1 ]'
arch/arm/mach-s3c24xx/sleep-s3c2412.S:62: Error: ARM register expected -- `ldrne r9,[ r2 ]'
arch/arm/mach-s3c24xx/sleep-s3c2412.S:63: Error: ARM register expected -- `strne r9,[ r2 ]'
arch/arm/mach-s3c24xx/sleep-s3c2412.S:64: Error: ARM register expected -- `ldrne r9,[ r3 ]'
arch/arm/mach-s3c24xx/sleep-s3c2412.S:65: Error: ARM register expected -- `strne r9,[ r3 ]'
arch/arm/kernel/debug.S:83: Error: ARM register expected -- `ldr r2,[ r3,#(0x08)]'
arch/arm/kernel/debug.S:83: Error: ARM register expected -- `ldr r2,[ r3,#(0x18)]'
arch/arm/kernel/debug.S:83: Error: ARM register expected -- `ldr r2,[ r3,#(0x10)]'
arch/arm/kernel/debug.S:85: Error: ARM register expected -- `ldr r2,[ r3,#(0x08)]'
arch/arm/kernel/debug.S:85: Error: ARM register expected -- `ldr r2,[ r3,#(0x18)]'
arch/arm/kernel/debug.S:85: Error: ARM register expected -- `ldr r2,[ r3,#(0x10)]'

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Kukjin Kim <kgene.kim@samsung.com>
Cc: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 arch/arm/mach-s3c24xx/include/mach/debug-macro.S | 12 ++++++------
 arch/arm/mach-s3c24xx/include/mach/entry-macro.S |  4 ++--
 arch/arm/mach-s3c24xx/pm-h1940.S                 |  2 +-
 arch/arm/mach-s3c24xx/sleep-s3c2410.S            | 12 ++++++------
 arch/arm/mach-s3c24xx/sleep-s3c2412.S            | 12 ++++++------
 arch/arm/plat-samsung/include/plat/debug-macro.S | 18 +++++++++---------
 6 files changed, 30 insertions(+), 30 deletions(-)

diff --git a/arch/arm/mach-s3c24xx/include/mach/debug-macro.S b/arch/arm/mach-s3c24xx/include/mach/debug-macro.S
index 4135de8..13ed33c 100644
--- a/arch/arm/mach-s3c24xx/include/mach/debug-macro.S
+++ b/arch/arm/mach-s3c24xx/include/mach/debug-macro.S
@@ -40,17 +40,17 @@
 		addeq	\rd, \rx, #(S3C24XX_PA_GPIO - S3C24XX_PA_UART)
 		addne	\rd, \rx, #(S3C24XX_VA_GPIO - S3C24XX_VA_UART)
 		bic	\rd, \rd, #0xff000
-		ldr	\rd, [ \rd, # S3C2410_GSTATUS1 - S3C2410_GPIOREG(0) ]
+		ldr	\rd, [\rd, # S3C2410_GSTATUS1 - S3C2410_GPIOREG(0)]
 		and	\rd, \rd, #0x00ff0000
 		teq	\rd, #0x00440000		@ is it 2440?
 1004:
-		ldr	\rd, [ \rx, # S3C2410_UFSTAT ]
+		ldr	\rd, [\rx, # S3C2410_UFSTAT]
 		moveq	\rd, \rd, lsr #SHIFT_2440TXF
 		tst	\rd, #S3C2410_UFSTAT_TXFULL
 	.endm
 
 	.macro  fifo_full_s3c2410 rd, rx
-		ldr	\rd, [ \rx, # S3C2410_UFSTAT ]
+		ldr	\rd, [\rx, # S3C2410_UFSTAT]
 		tst	\rd, #S3C2410_UFSTAT_TXFULL
 	.endm
 
@@ -68,18 +68,18 @@
 		addeq	\rd, \rx, #(S3C24XX_PA_GPIO - S3C24XX_PA_UART)
 		addne	\rd, \rx, #(S3C24XX_VA_GPIO - S3C24XX_VA_UART)
 		bic	\rd, \rd, #0xff000
-		ldr	\rd, [ \rd, # S3C2410_GSTATUS1 - S3C2410_GPIOREG(0) ]
+		ldr	\rd, [\rd, # S3C2410_GSTATUS1 - S3C2410_GPIOREG(0)]
 		and	\rd, \rd, #0x00ff0000
 		teq	\rd, #0x00440000		@ is it 2440?
 
 10000:
-		ldr	\rd, [ \rx, # S3C2410_UFSTAT ]
+		ldr	\rd, [\rx, # S3C2410_UFSTAT]
 		andne	\rd, \rd, #S3C2410_UFSTAT_TXMASK
 		andeq	\rd, \rd, #S3C2440_UFSTAT_TXMASK
 	.endm
 
 	.macro fifo_level_s3c2410 rd, rx
-		ldr	\rd, [ \rx, # S3C2410_UFSTAT ]
+		ldr	\rd, [\rx, # S3C2410_UFSTAT]
 		and	\rd, \rd, #S3C2410_UFSTAT_TXMASK
 	.endm
 
diff --git a/arch/arm/mach-s3c24xx/include/mach/entry-macro.S b/arch/arm/mach-s3c24xx/include/mach/entry-macro.S
index 7615a14..6a21bee 100644
--- a/arch/arm/mach-s3c24xx/include/mach/entry-macro.S
+++ b/arch/arm/mach-s3c24xx/include/mach/entry-macro.S
@@ -31,10 +31,10 @@
 
 		@@ try the interrupt offset register, since it is there
 
-		ldr	\irqstat, [ \base, #INTPND ]
+		ldr	\irqstat, [\base, #INTPND ]
 		teq	\irqstat, #0
 		beq	1002f
-		ldr	\irqnr, [ \base, #INTOFFSET ]
+		ldr	\irqnr, [\base, #INTOFFSET ]
 		mov	\tmp, #1
 		tst	\irqstat, \tmp, lsl \irqnr
 		bne	1001f
diff --git a/arch/arm/mach-s3c24xx/pm-h1940.S b/arch/arm/mach-s3c24xx/pm-h1940.S
index c93bf2d..6183a68 100644
--- a/arch/arm/mach-s3c24xx/pm-h1940.S
+++ b/arch/arm/mach-s3c24xx/pm-h1940.S
@@ -30,4 +30,4 @@
 
 h1940_pm_return:
 	mov	r0, #S3C2410_PA_GPIO
-	ldr	pc, [ r0, #S3C2410_GSTATUS3 - S3C24XX_VA_GPIO ]
+	ldr	pc, [r0, #S3C2410_GSTATUS3 - S3C24XX_VA_GPIO]
diff --git a/arch/arm/mach-s3c24xx/sleep-s3c2410.S b/arch/arm/mach-s3c24xx/sleep-s3c2410.S
index dd5b638..65200ae 100644
--- a/arch/arm/mach-s3c24xx/sleep-s3c2410.S
+++ b/arch/arm/mach-s3c24xx/sleep-s3c2410.S
@@ -45,9 +45,9 @@ ENTRY(s3c2410_cpu_suspend)
 	ldr	r4, =S3C2410_REFRESH
 	ldr	r5, =S3C24XX_MISCCR
 	ldr	r6, =S3C2410_CLKCON
-	ldr	r7, [ r4 ]		@ get REFRESH (and ensure in TLB)
-	ldr	r8, [ r5 ]		@ get MISCCR (and ensure in TLB)
-	ldr	r9, [ r6 ]		@ get CLKCON (and ensure in TLB)
+	ldr	r7, [r4]		@ get REFRESH (and ensure in TLB)
+	ldr	r8, [r5]		@ get MISCCR (and ensure in TLB)
+	ldr	r9, [r6]		@ get CLKCON (and ensure in TLB)
 
 	orr	r7, r7, #S3C2410_REFRESH_SELF	@ SDRAM sleep command
 	orr	r8, r8, #S3C2410_MISCCR_SDSLEEP @ SDRAM power-down signals
@@ -61,8 +61,8 @@ ENTRY(s3c2410_cpu_suspend)
 	@@ align next bit of code to cache line
 	.align	5
 s3c2410_do_sleep:
-	streq	r7, [ r4 ]			@ SDRAM sleep command
-	streq	r8, [ r5 ]			@ SDRAM power-down config
-	streq	r9, [ r6 ]			@ CPU sleep
+	streq	r7, [r4]			@ SDRAM sleep command
+	streq	r8, [r5]			@ SDRAM power-down config
+	streq	r9, [r6]			@ CPU sleep
 1:	beq	1b
 	mov	pc, r14
diff --git a/arch/arm/mach-s3c24xx/sleep-s3c2412.S b/arch/arm/mach-s3c24xx/sleep-s3c2412.S
index c82418e..5adaceb 100644
--- a/arch/arm/mach-s3c24xx/sleep-s3c2412.S
+++ b/arch/arm/mach-s3c24xx/sleep-s3c2412.S
@@ -57,12 +57,12 @@ s3c2412_sleep_enter1:
 	 * retry, as simply returning causes the system to lock.
 	*/
 
-	ldrne	r9, [ r1 ]
-	strne	r9, [ r1 ]
-	ldrne	r9, [ r2 ]
-	strne	r9, [ r2 ]
-	ldrne	r9, [ r3 ]
-	strne	r9, [ r3 ]
+	ldrne	r9, [r1]
+	strne	r9, [r1]
+	ldrne	r9, [r2]
+	strne	r9, [r2]
+	ldrne	r9, [r3]
+	strne	r9, [r3]
 	bne	s3c2412_sleep_enter1
 
 	mov	pc, r14
diff --git a/arch/arm/plat-samsung/include/plat/debug-macro.S b/arch/arm/plat-samsung/include/plat/debug-macro.S
index 207e275..f3a9cff 100644
--- a/arch/arm/plat-samsung/include/plat/debug-macro.S
+++ b/arch/arm/plat-samsung/include/plat/debug-macro.S
@@ -14,12 +14,12 @@
 /* The S5PV210/S5PC110 implementations are as belows. */
 
 	.macro fifo_level_s5pv210 rd, rx
-		ldr	\rd, [ \rx, # S3C2410_UFSTAT ]
+		ldr	\rd, [\rx, # S3C2410_UFSTAT]
 		and	\rd, \rd, #S5PV210_UFSTAT_TXMASK
 	.endm
 
 	.macro  fifo_full_s5pv210 rd, rx
-		ldr	\rd, [ \rx, # S3C2410_UFSTAT ]
+		ldr	\rd, [\rx, # S3C2410_UFSTAT]
 		tst	\rd, #S5PV210_UFSTAT_TXFULL
 	.endm
 
@@ -27,7 +27,7 @@
  * most widely re-used */
 
 	.macro fifo_level_s3c2440 rd, rx
-		ldr	\rd, [ \rx, # S3C2410_UFSTAT ]
+		ldr	\rd, [\rx, # S3C2410_UFSTAT]
 		and	\rd, \rd, #S3C2440_UFSTAT_TXMASK
 	.endm
 
@@ -36,7 +36,7 @@
 #endif
 
 	.macro  fifo_full_s3c2440 rd, rx
-		ldr	\rd, [ \rx, # S3C2410_UFSTAT ]
+		ldr	\rd, [\rx, # S3C2410_UFSTAT]
 		tst	\rd, #S3C2440_UFSTAT_TXFULL
 	.endm
 
@@ -45,11 +45,11 @@
 #endif
 
 	.macro	senduart,rd,rx
-		strb 	\rd, [\rx, # S3C2410_UTXH ]
+		strb 	\rd, [\rx, # S3C2410_UTXH]
 	.endm
 
 	.macro	busyuart, rd, rx
-		ldr	\rd, [ \rx, # S3C2410_UFCON ]
+		ldr	\rd, [\rx, # S3C2410_UFCON]
 		tst	\rd, #S3C2410_UFCON_FIFOMODE	@ fifo enabled?
 		beq	1001f				@
 		@ FIFO enabled...
@@ -60,7 +60,7 @@
 
 1001:
 		@ busy waiting for non fifo
-		ldr	\rd, [ \rx, # S3C2410_UTRSTAT ]
+		ldr	\rd, [\rx, # S3C2410_UTRSTAT]
 		tst	\rd, #S3C2410_UTRSTAT_TXFE
 		beq	1001b
 
@@ -68,7 +68,7 @@
 	.endm
 
 	.macro	waituart,rd,rx
-		ldr	\rd, [ \rx, # S3C2410_UFCON ]
+		ldr	\rd, [\rx, # S3C2410_UFCON]
 		tst	\rd, #S3C2410_UFCON_FIFOMODE	@ fifo enabled?
 		beq	1001f				@
 		@ FIFO enabled...
@@ -79,7 +79,7 @@
 		b	1002f
 1001:
 		@ idle waiting for non fifo
-		ldr	\rd, [ \rx, # S3C2410_UTRSTAT ]
+		ldr	\rd, [\rx, # S3C2410_UTRSTAT]
 		tst	\rd, #S3C2410_UTRSTAT_TXFE
 		beq	1001b
 
-- 
1.8.1.2

[PATCH 051/139] USB: ehci-omap: Don't free gpios that we didn't request

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Roger Quadros <rogerq@ti.com>

commit 428525f97153505e83983460a8d08a3210aa6b8a upstream.

This driver does not request any gpios so don't free them.
Fixes L3 bus error on multiple modprobe/rmmod of ehci_hcd
with ehci-omap in use.

Without this patch, EHCI will break on repeated insmod/rmmod
of ehci_hcd for all OMAP2+ platforms that use EHCI and
set 'phy_reset = true' in usbhs_omap_board_data.
i.e.

board-3430sdp.c:	.phy_reset  = true,
board-3630sdp.c:	.phy_reset  = true,
board-am3517crane.c:	.phy_reset  = true,
board-am3517evm.c:	.phy_reset  = true,
board-cm-t3517.c:	.phy_reset  = true,
board-cm-t35.c:	.phy_reset  = true,
board-devkit8000.c:	.phy_reset  = true,
board-igep0020.c:	.phy_reset = true,
board-igep0020.c:	.phy_reset = true,
board-omap3beagle.c:	.phy_reset  = true,
board-omap3evm.c:	.phy_reset  = true,
board-omap3pandora.c:	.phy_reset  = true,
board-omap3stalker.c:	.phy_reset = true,
board-omap3touchbook.c:	.phy_reset  = true,
board-omap4panda.c:	.phy_reset  = false,
board-overo.c:	.phy_reset  = true,
board-zoom.c:	.phy_reset		= true,

Signed-off-by: Roger Quadros <rogerq@ti.com>
Reviewed-by: Felipe Balbi <balbi@ti.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/usb/host/ehci-omap.c | 8 --------
 1 file changed, 8 deletions(-)

diff --git a/drivers/usb/host/ehci-omap.c b/drivers/usb/host/ehci-omap.c
index 4a54418..30f8b24 100644
--- a/drivers/usb/host/ehci-omap.c
+++ b/drivers/usb/host/ehci-omap.c
@@ -289,7 +289,6 @@ static int ehci_hcd_omap_remove(struct platform_device *pdev)
 {
 	struct device *dev				= &pdev->dev;
 	struct usb_hcd *hcd				= dev_get_drvdata(dev);
-	struct ehci_hcd_omap_platform_data *pdata	= dev->platform_data;
 
 	usb_remove_hcd(hcd);
 	disable_put_regulator(dev->platform_data);
@@ -299,13 +298,6 @@ static int ehci_hcd_omap_remove(struct platform_device *pdev)
 	pm_runtime_put_sync(dev);
 	pm_runtime_disable(dev);
 
-	if (pdata->phy_reset) {
-		if (gpio_is_valid(pdata->reset_gpio_port[0]))
-			gpio_free(pdata->reset_gpio_port[0]);
-
-		if (gpio_is_valid(pdata->reset_gpio_port[1]))
-			gpio_free(pdata->reset_gpio_port[1]);
-	}
 	return 0;
 }
 
-- 
1.8.1.2

[PATCH 052/139] USB: ehci-omap: Fix autoloading of module

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Roger Quadros <rogerq@ti.com>

commit 04753523266629b1cd0518091da1658755787198 upstream.

The module alias should be "ehci-omap" and not
"omap-ehci" to match the platform device name.
The omap-ehci module should now autoload correctly.

Signed-off-by: Roger Quadros <rogerq@ti.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/usb/host/ehci-omap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/host/ehci-omap.c b/drivers/usb/host/ehci-omap.c
index 30f8b24..5d407fd 100644
--- a/drivers/usb/host/ehci-omap.c
+++ b/drivers/usb/host/ehci-omap.c
@@ -365,7 +365,7 @@ static const struct hc_driver ehci_omap_hc_driver = {
 	.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
 };
 
-MODULE_ALIAS("platform:omap-ehci");
+MODULE_ALIAS("platform:ehci-omap");
 MODULE_AUTHOR("Texas Instruments, Inc.");
 MODULE_AUTHOR("Felipe Balbi <felipe.balbi@nokia.com>");
 
-- 
1.8.1.2

[PATCH 053/139] USB: usb-storage: unusual_devs update for Super TOP SATA bridge

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Josh Boyer <jwboyer@redhat.com>

commit 18e03310b5caa6d11c1a8c61b982c37047693fba upstream.

The current entry in unusual_cypress.h for the Super TOP SATA bridge devices
seems to be causing corruption on newer revisions of this device.  This has
been reported in Arch Linux and Fedora.  The original patch was tested on
devices with bcdDevice of 1.60, whereas the newer devices report bcdDevice
as 2.20.  Limit the UNUSUAL_DEV entry to devices less than 2.20.

This fixes https://bugzilla.redhat.com/show_bug.cgi?id=909591

The Arch Forum post on this is here:
	https://bbs.archlinux.org/viewtopic.php?id=152011

Reported-by: Carsten S. <carsteniq@yahoo.com>
Tested-by: Carsten S. <carsteniq@yahoo.com>
Signed-off-by: Josh Boyer <jwboyer@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/usb/storage/unusual_cypress.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/storage/unusual_cypress.h b/drivers/usb/storage/unusual_cypress.h
index 2c85530..65a6a75 100644
--- a/drivers/usb/storage/unusual_cypress.h
+++ b/drivers/usb/storage/unusual_cypress.h
@@ -31,7 +31,7 @@ UNUSUAL_DEV(  0x04b4, 0x6831, 0x0000, 0x9999,
 		"Cypress ISD-300LP",
 		USB_SC_CYP_ATACB, USB_PR_DEVICE, NULL, 0),
 
-UNUSUAL_DEV( 0x14cd, 0x6116, 0x0000, 0x9999,
+UNUSUAL_DEV( 0x14cd, 0x6116, 0x0000, 0x0219,
 		"Super Top",
 		"USB 2.0  SATA BRIDGE",
 		USB_SC_CYP_ATACB, USB_PR_DEVICE, NULL, 0),
-- 
1.8.1.2

[PATCH 054/139] perf tools: Fix build with bison 2.3 and older.

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Vinson Lee <vlee@twitter.com>

commit 85df3b3769222894e9692b383c7af124b7721086 upstream.

The %name-prefix "prefix" syntax is not available on bison 2.3 and
older. Substitute with the -p "prefix" command-line option for
compatibility with older versions of bison.

This patch fixes this build error with older versions of bison.

    CC util/sysfs.o
    BISON util/pmu-bison.c
util/pmu.y:2.14-24: syntax error, unexpected string, expecting =
make: *** [util/pmu-bison.c] Error 1

Signed-off-by: Vinson Lee <vlee@twitter.com>
Tested-by: Li Zefan <lizefan@huawei.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Li Zefan <lizefan@huawei.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Pekka Enberg <penberg@kernel.org>
Link: http://lkml.kernel.org/r/1360792138-29186-1-git-send-email-vlee@twitter.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
[ luis: adjust context ]
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 tools/perf/Makefile            | 4 ++--
 tools/perf/util/parse-events.y | 1 -
 tools/perf/util/pmu.y          | 1 -
 3 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index e21f414..7bc7233 100644
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -225,13 +225,13 @@ $(OUTPUT)util/parse-events-flex.c: util/parse-events.l
 	$(QUIET_FLEX)$(FLEX) --header-file=$(OUTPUT)util/parse-events-flex.h $(PARSER_DEBUG_FLEX) -t util/parse-events.l > $(OUTPUT)util/parse-events-flex.c
 
 $(OUTPUT)util/parse-events-bison.c: util/parse-events.y
-	$(QUIET_BISON)$(BISON) -v util/parse-events.y -d $(PARSER_DEBUG_BISON) -o $(OUTPUT)util/parse-events-bison.c
+	$(QUIET_BISON)$(BISON) -v util/parse-events.y -d $(PARSER_DEBUG_BISON) -o $(OUTPUT)util/parse-events-bison.c -p parse_events_
 
 $(OUTPUT)util/pmu-flex.c: util/pmu.l
 	$(QUIET_FLEX)$(FLEX) --header-file=$(OUTPUT)util/pmu-flex.h -t util/pmu.l > $(OUTPUT)util/pmu-flex.c
 
 $(OUTPUT)util/pmu-bison.c: util/pmu.y
-	$(QUIET_BISON)$(BISON) -v util/pmu.y -d -o $(OUTPUT)util/pmu-bison.c
+	$(QUIET_BISON)$(BISON) -v util/pmu.y -d -o $(OUTPUT)util/pmu-bison.c -p perf_pmu_
 
 $(OUTPUT)util/parse-events.o: $(OUTPUT)util/parse-events-flex.c $(OUTPUT)util/parse-events-bison.c
 $(OUTPUT)util/pmu.o: $(OUTPUT)util/pmu-flex.c $(OUTPUT)util/pmu-bison.c
diff --git a/tools/perf/util/parse-events.y b/tools/perf/util/parse-events.y
index 362cc59..14a42b8 100644
--- a/tools/perf/util/parse-events.y
+++ b/tools/perf/util/parse-events.y
@@ -1,5 +1,4 @@
 
-%name-prefix "parse_events_"
 %parse-param {struct list_head *list_all}
 %parse-param {int *idx}
 
diff --git a/tools/perf/util/pmu.y b/tools/perf/util/pmu.y
index 20ea77e..522943f 100644
--- a/tools/perf/util/pmu.y
+++ b/tools/perf/util/pmu.y
@@ -1,5 +1,4 @@
 
-%name-prefix "perf_pmu_"
 %parse-param {struct list_head *format}
 %parse-param {char *name}
 
-- 
1.8.1.2

[PATCH 055/139] serial: imx: Fix recursive locking bug

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Thomas Gleixner <tglx@linutronix.de>

commit 677fe555cbfb188af58cce105f4dae9505e58c31 upstream.

commit 9ec1882df2 (tty: serial: imx: console write routing is unsafe
on SMP) introduced a recursive locking bug in imx_console_write().

The callchain is:

imx_rxint()
  spin_lock_irqsave(&sport->port.lock,flags);
  ...
  uart_handle_sysrq_char();
    sysrq_function();
      printk();
        imx_console_write();
          spin_lock_irqsave(&sport->port.lock,flags); <--- DEAD

The bad news is that the kernel debugging facilities can dectect the
problem, but the printks never surface on the serial console for
obvious reasons.

There is a similar issue with oops_in_progress. If the kernel crashes
we really don't want to be stuck on the lock and unable to tell what
happened.

In general most UP originated drivers miss these checks and nobody
ever notices because CONFIG_PROVE_LOCKING seems to be still ignored by
a large number of developers.

The solution is to avoid locking in the sysrq case and trylock in the
oops_in_progress case.

This scheme is used in other drivers as well and it would be nice if
we could move this to a common place, so the usual copy/paste/modify
bugs can be avoided.

Now there is another issue with this scheme:

CPU0 	    	     	 CPU1
printk()
			 rxint()
			   sysrq_detection() -> sets port->sysrq
			 return from interrupt
  console_write()
     if (port->sysrq)
     	avoid locking

port->sysrq is reset with the next receive character. So as long as
the port->sysrq is not reset and this can take an endless amount of
time if after the break no futher receive character follows, all
console writes happen unlocked.

While the current writer is protected against other console writers by
the console sem, it's unprotected against open/close or other
operations which fiddle with the port. That's what the above mentioned
commit tried to solve.

That's an issue in all drivers which use that scheme and unfortunately
there is no easy workaround. The only solution is to have a separate
indicator port->sysrq_cpu. uart_handle_sysrq_char() then sets it to
smp_processor_id() before calling into handle_sysrq() and resets it to
-1 after that. Then change the locking check to:

     if (port->sysrq_cpu == smp_processor_id())
     	 locked = 0;
     else if (oops_in_progress)
         locked = spin_trylock_irqsave(port->lock, flags);
     else
  	 spin_lock_irqsave(port->lock, flags);

That would force all other cpus into the spin_lock path. Problem
solved, but that's way beyond the scope of this fix and really wants
to be implemented in a common function which calls the uart specific
write function to avoid another gazillion of hard to debug
copy/paste/modify bugs.

Reported-and-tested-by: Tim Sander <tim@krieglstein.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/tty/serial/imx.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index e983331..616f8c5 100644
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -1217,8 +1217,14 @@ imx_console_write(struct console *co, const char *s, unsigned int count)
 	struct imx_port_ucrs old_ucr;
 	unsigned int ucr1;
 	unsigned long flags;
+	int locked = 1;
 
-	spin_lock_irqsave(&sport->port.lock, flags);
+	if (sport->port.sysrq)
+		locked = 0;
+	else if (oops_in_progress)
+		locked = spin_trylock_irqsave(&sport->port.lock, flags);
+	else
+		spin_lock_irqsave(&sport->port.lock, flags);
 
 	/*
 	 *	First, save UCR1/2/3 and then disable interrupts
@@ -1245,7 +1251,8 @@ imx_console_write(struct console *co, const char *s, unsigned int count)
 
 	imx_port_ucrs_restore(&sport->port, &old_ucr);
 
-	spin_unlock_irqrestore(&sport->port.lock, flags);
+	if (locked)
+		spin_unlock_irqrestore(&sport->port.lock, flags);
 }
 
 /*
-- 
1.8.1.2

[PATCH 056/139] posix-cpu-timers: Fix nanosleep task_struct leak

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Stanislaw Gruszka <sgruszka@redhat.com>

commit e6c42c295e071dd74a66b5a9fcf4f44049888ed8 upstream.

The trinity fuzzer triggered a task_struct reference leak via
clock_nanosleep with CPU_TIMERs. do_cpu_nanosleep() calls
posic_cpu_timer_create(), but misses a corresponding
posix_cpu_timer_del() which leads to the task_struct reference leak.

Reported-and-tested-by: Tommi Rantala <tt.rantala@gmail.com>
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Cc: Dave Jones <davej@redhat.com>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Link: http://lkml.kernel.org/r/20130215100810.GF4392@redhat.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 kernel/posix-cpu-timers.c | 23 +++++++++++++++++++++--
 1 file changed, 21 insertions(+), 2 deletions(-)

diff --git a/kernel/posix-cpu-timers.c b/kernel/posix-cpu-timers.c
index 125cb67..acbb79c 100644
--- a/kernel/posix-cpu-timers.c
+++ b/kernel/posix-cpu-timers.c
@@ -1422,8 +1422,10 @@ static int do_cpu_nanosleep(const clockid_t which_clock, int flags,
 		while (!signal_pending(current)) {
 			if (timer.it.cpu.expires.sched == 0) {
 				/*
-				 * Our timer fired and was reset.
+				 * Our timer fired and was reset, below
+				 * deletion can not fail.
 				 */
+				posix_cpu_timer_del(&timer);
 				spin_unlock_irq(&timer.it_lock);
 				return 0;
 			}
@@ -1441,9 +1443,26 @@ static int do_cpu_nanosleep(const clockid_t which_clock, int flags,
 		 * We were interrupted by a signal.
 		 */
 		sample_to_timespec(which_clock, timer.it.cpu.expires, rqtp);
-		posix_cpu_timer_set(&timer, 0, &zero_it, it);
+		error = posix_cpu_timer_set(&timer, 0, &zero_it, it);
+		if (!error) {
+			/*
+			 * Timer is now unarmed, deletion can not fail.
+			 */
+			posix_cpu_timer_del(&timer);
+		}
 		spin_unlock_irq(&timer.it_lock);
 
+		while (error == TIMER_RETRY) {
+			/*
+			 * We need to handle case when timer was or is in the
+			 * middle of firing. In other cases we already freed
+			 * resources.
+			 */
+			spin_lock_irq(&timer.it_lock);
+			error = posix_cpu_timer_del(&timer);
+			spin_unlock_irq(&timer.it_lock);
+		}
+
 		if ((it->it_value.tv_sec | it->it_value.tv_nsec) == 0) {
 			/*
 			 * It actually did fire already.
-- 
1.8.1.2

[PATCH 057/139] drivercore: Fix ordering between deferred_probe and exiting initcalls

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Grant Likely <grant.likely@secretlab.ca>

commit d72cca1eee5b26e313da2a380d4862924e271031 upstream.

One of the side effects of deferred probe is that some drivers which
used to be probed before initcalls completed are now happening slightly
later. This causes two problems.
- If a console driver gets deferred, then it may not be ready when
  userspace starts. For example, if a uart depends on pinctrl, then the
  uart will get deferred and /dev/console will not be available
- __init sections will be discarded before built-in drivers are probed.
  Strictly speaking, __init functions should not be called in a drivers
  __probe path, but there are a lot of drivers (console stuff again)
  that do anyway. In the past it was perfectly safe to do so because all
  built-in drivers got probed before the end of initcalls.

This patch fixes the problem by forcing the first pass of the deferred
list to complete at late_initcall time. This is late enough to catch the
drivers that are known to have the above issues.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Tested-by: Haojian Zhuang <haojian.zhuang@linaro.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/base/dd.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/base/dd.c b/drivers/base/dd.c
index 4b01ab3..82ff801 100644
--- a/drivers/base/dd.c
+++ b/drivers/base/dd.c
@@ -161,6 +161,8 @@ static int deferred_probe_initcall(void)
 
 	driver_deferred_probe_enable = true;
 	driver_deferred_probe_trigger();
+	/* Sort as many dependencies as possible before exiting initcalls */
+	flush_workqueue(deferred_wq);
 	return 0;
 }
 late_initcall(deferred_probe_initcall);
-- 
1.8.1.2

[PATCH 058/139] NFSv4.1: Don't decode skipped layoutgets

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Weston Andros Adamson <dros@netapp.com>

commit 085b7a45c63d3da5be155faab9249a5cab224561 upstream.

layoutget's prepare hook can call rpc_exit with status = NFS4_OK (0).
Because of this, nfs4_proc_layoutget can't depend on a 0 status to mean
that the RPC was successfully sent, received and parsed.

To fix this, use the result's len member to see if parsing took place.

This fixes the following OOPS -- calling xdr_init_decode() with a buffer length
0 doesn't set the stream's 'p' member and ends up using uninitialized memory
in filelayout_decode_layout.

BUG: unable to handle kernel paging request at 0000000000008050
IP: [<ffffffff81282e78>] memcpy+0x18/0x120
PGD 0
Oops: 0000 [#1] SMP
last sysfs file: /sys/devices/pci0000:00/0000:00:11.0/0000:02:01.0/irq
CPU 1
Modules linked in: nfs_layout_nfsv41_files nfs lockd fscache auth_rpcgss nfs_acl autofs4 sunrpc ipt_REJECT nf_conntrack_ipv4 nf_defrag_ipv4 iptable_filter ip_tables ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 xt_state nf_conntrack ip6table_filter ip6_tables ipv6 dm_mirror dm_region_hash dm_log dm_mod ppdev parport_pc parport snd_ens1371 snd_rawmidi snd_ac97_codec ac97_bus snd_seq snd_seq_device snd_pcm snd_timer snd soundcore snd_page_alloc e1000 microcode vmware_balloon i2c_piix4 i2c_core sg shpchp ext4 mbcache jbd2 sr_mod cdrom sd_mod crc_t10dif pata_acpi ata_generic ata_piix mptspi mptscsih mptbase scsi_transport_spi [last unloaded: speedstep_lib]

Pid: 1665, comm: flush-0:22 Not tainted 2.6.32-356-test-2 #2 VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform
RIP: 0010:[<ffffffff81282e78>]  [<ffffffff81282e78>] memcpy+0x18/0x120
RSP: 0018:ffff88003dfab588  EFLAGS: 00010206
RAX: ffff88003dc42000 RBX: ffff88003dfab610 RCX: 0000000000000009
RDX: 000000003f807ff0 RSI: 0000000000008050 RDI: ffff88003dc42000
RBP: ffff88003dfab5b0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000080 R12: 0000000000000024
R13: ffff88003dc42000 R14: ffff88003f808030 R15: ffff88003dfab6a0
FS:  0000000000000000(0000) GS:ffff880003420000(0000) knlGS:0000000000000000
CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
CR2: 0000000000008050 CR3: 000000003bc92000 CR4: 00000000001407e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process flush-0:22 (pid: 1665, threadinfo ffff88003dfaa000, task ffff880037f77540)
Stack:
ffffffffa0398ac1 ffff8800397c5940 ffff88003dfab610 ffff88003dfab6a0
<d> ffff88003dfab5d0 ffff88003dfab680 ffffffffa01c150b ffffea0000d82e70
<d> 000000508116713b 0000000000000000 0000000000000000 0000000000000000
Call Trace:
[<ffffffffa0398ac1>] ? xdr_inline_decode+0xb1/0x120 [sunrpc]
[<ffffffffa01c150b>] filelayout_decode_layout+0xeb/0x350 [nfs_layout_nfsv41_files]
[<ffffffffa01c17fc>] filelayout_alloc_lseg+0x8c/0x3c0 [nfs_layout_nfsv41_files]
[<ffffffff8150e6ce>] ? __wait_on_bit+0x7e/0x90

Signed-off-by: Weston Andros Adamson <dros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
[ luis: adjust context ]
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 fs/nfs/nfs4proc.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index c1bad65..81d51aa 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -6287,7 +6287,8 @@ int nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
 	status = nfs4_wait_for_completion_rpc_task(task);
 	if (status == 0)
 		status = task->tk_status;
-	if (status == 0)
+	/* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
+	if (status == 0 && lgp->res.layoutp->len)
 		status = pnfs_layout_process(lgp);
 	rpc_put_task(task);
 	dprintk("<-- %s status=%d\n", __func__, status);
-- 
1.8.1.2

[PATCH 059/139] umount oops when remove blocklayoutdriver first

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: fanchaoting <fanchaoting@cn.fujitsu.com>

commit 5a12cca697aca5dfba42a7d4c3356acc0445a2b0 upstream.

now pnfs client uses block layout, maybe we can remove
blocklayoutdriver first. if we umount later,
it can cause oops in unset_pnfs_layoutdriver.
because nfss->pnfs_curr_ld->clear_layoutdriver is invalid.

reproduce it:
 modprobe  blocklayoutdriver
 mount -t nfs4 -o minorversion=1 pnfsip:/ /mnt/
 rmmod blocklayoutdriver
 umount /mnt

then you can see following

CPU 0
Pid: 17023, comm: umount.nfs4 Tainted: GF          O 3.7.0-rc6-pnfs #1 VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform
RIP: 0010:[<ffffffffa04cfe6d>]  [<ffffffffa04cfe6d>] unset_pnfs_layoutdriver+0x1d/0x70 [nfsv4]
RSP: 0018:ffff8800022d9e48  EFLAGS: 00010286
RAX: ffffffffa04a1b00 RBX: ffff88000b013800 RCX: 0000000000000001
RDX: ffffffff81ae8ee0 RSI: ffff880001ee94b8 RDI: ffff88000b013800
RBP: ffff8800022d9e58 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff880001ee9400
R13: ffff8800105978c0 R14: 00007fff25846c08 R15: 0000000001bba550
FS:  00007f45ae7f0700(0000) GS:ffff880012c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: ffffffffa04a1b38 CR3: 0000000002c0c000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process umount.nfs4 (pid: 17023, threadinfo ffff8800022d8000, task ffff880006e48aa0)
Stack:
ffff8800105978c0 ffff88000b013800 ffff8800022d9e78 ffffffffa04cd0ce
ffff8800022d9e78 ffff88000b013800 ffff8800022d9ea8 ffffffffa04755a7
ffff8800022d9ea8 ffff880002f96400 ffff88000b013800 ffff880002f96400
Call Trace:
[<ffffffffa04cd0ce>] nfs4_destroy_server+0x1e/0x30 [nfsv4]
[<ffffffffa04755a7>] nfs_free_server+0xb7/0x150 [nfs]
[<ffffffffa047d4d5>] nfs_kill_super+0x35/0x40 [nfs]
[<ffffffff81178d35>] deactivate_locked_super+0x45/0x70
[<ffffffff8117986a>] deactivate_super+0x4a/0x70
[<ffffffff81193ee2>] mntput_no_expire+0xd2/0x130
[<ffffffff81194d62>] sys_umount+0x72/0xe0
[<ffffffff8154af59>] system_call_fastpath+0x16/0x1b
Code: 06 e1 b8 ea ff ff ff eb 9e 0f 1f 44 00 00 55 48 89 e5 53 48 83 ec 08 66 66 66 66 90 48 8b 87 80 03 00 00 48 89 fb 48 85 c0 74 29 <48> 8b 40 38 48 85 c0 74 02 ff d0 48 8b 03 3e ff 48 04 0f 94 c2
RIP  [<ffffffffa04cfe6d>] unset_pnfs_layoutdriver+0x1d/0x70 [nfsv4]
RSP <ffff8800022d9e48>
CR2: ffffffffa04a1b38
---[ end trace 29f75aaedda058bf ]---

Signed-off-by: fanchaoting<fanchaoting@cn.fujitsu.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 fs/nfs/blocklayout/blocklayout.c | 1 +
 fs/nfs/objlayout/objio_osd.c     | 1 +
 2 files changed, 2 insertions(+)

diff --git a/fs/nfs/blocklayout/blocklayout.c b/fs/nfs/blocklayout/blocklayout.c
index 1093968..62f18f7 100644
--- a/fs/nfs/blocklayout/blocklayout.c
+++ b/fs/nfs/blocklayout/blocklayout.c
@@ -1240,6 +1240,7 @@ static const struct nfs_pageio_ops bl_pg_write_ops = {
 static struct pnfs_layoutdriver_type blocklayout_type = {
 	.id				= LAYOUT_BLOCK_VOLUME,
 	.name				= "LAYOUT_BLOCK_VOLUME",
+	.owner				= THIS_MODULE,
 	.read_pagelist			= bl_read_pagelist,
 	.write_pagelist			= bl_write_pagelist,
 	.alloc_layout_hdr		= bl_alloc_layout_hdr,
diff --git a/fs/nfs/objlayout/objio_osd.c b/fs/nfs/objlayout/objio_osd.c
index f50d3e8..2f45c4f 100644
--- a/fs/nfs/objlayout/objio_osd.c
+++ b/fs/nfs/objlayout/objio_osd.c
@@ -591,6 +591,7 @@ static struct pnfs_layoutdriver_type objlayout_type = {
 	.flags                   = PNFS_LAYOUTRET_ON_SETATTR |
 				   PNFS_LAYOUTRET_ON_ERROR,
 
+	.owner		       	 = THIS_MODULE,
 	.alloc_layout_hdr        = objlayout_alloc_layout_hdr,
 	.free_layout_hdr         = objlayout_free_layout_hdr,
 
-- 
1.8.1.2

[PATCH 060/139] HID: wiimote: fix nunchuck button parser

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: David Herrmann <dh.herrmann@gmail.com>

commit 89bdd0c6f38ccf0de43d5a36ede384a730f3394e upstream.

The buttons of the Wii Remote Nunchuck extension are actually active low.
Fix the parser to forward the inverted values. The comment in the function
always said "0 == pressed" but the implementation was wrong from the
beginning.

Reported-by: Victor Quicksilver <victor.quicksilver@gmail.com>
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/hid/hid-wiimote-ext.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/hid/hid-wiimote-ext.c b/drivers/hid/hid-wiimote-ext.c
index aa95870..9e57285 100644
--- a/drivers/hid/hid-wiimote-ext.c
+++ b/drivers/hid/hid-wiimote-ext.c
@@ -378,14 +378,14 @@ static void handler_nunchuck(struct wiimote_ext *ext, const __u8 *payload)
 
 	if (ext->motionp) {
 		input_report_key(ext->input,
-			wiiext_keymap[WIIEXT_KEY_Z], !!(payload[5] & 0x04));
+			wiiext_keymap[WIIEXT_KEY_Z], !(payload[5] & 0x04));
 		input_report_key(ext->input,
-			wiiext_keymap[WIIEXT_KEY_C], !!(payload[5] & 0x08));
+			wiiext_keymap[WIIEXT_KEY_C], !(payload[5] & 0x08));
 	} else {
 		input_report_key(ext->input,
-			wiiext_keymap[WIIEXT_KEY_Z], !!(payload[5] & 0x01));
+			wiiext_keymap[WIIEXT_KEY_Z], !(payload[5] & 0x01));
 		input_report_key(ext->input,
-			wiiext_keymap[WIIEXT_KEY_C], !!(payload[5] & 0x02));
+			wiiext_keymap[WIIEXT_KEY_C], !(payload[5] & 0x02));
 	}
 
 	input_sync(ext->input);
-- 
1.8.1.2

[PATCH 061/139] cgroup: fix exit() vs rmdir() race

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Li Zefan <lizefan@huawei.com>

commit 71b5707e119653039e6e95213f00479668c79b75 upstream.

In cgroup_exit() put_css_set_taskexit() is called without any lock,
which might lead to accessing a freed cgroup:

thread1                           thread2
---------------------------------------------
exit()
  cgroup_exit()
    put_css_set_taskexit()
      atomic_dec(cgrp->count);
                                   rmdir();
      /* not safe !! */
      check_for_release(cgrp);

rcu_read_lock() can be used to make sure the cgroup is alive.

Signed-off-by: Li Zefan <lizefan@huawei.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 kernel/cgroup.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 963c956..87fbb45 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -422,12 +422,20 @@ static void __put_css_set(struct css_set *cg, int taskexit)
 		struct cgroup *cgrp = link->cgrp;
 		list_del(&link->cg_link_list);
 		list_del(&link->cgrp_link_list);
+
+		/*
+		 * We may not be holding cgroup_mutex, and if cgrp->count is
+		 * dropped to 0 the cgroup can be destroyed at any time, hence
+		 * rcu_read_lock is used to keep it alive.
+		 */
+		rcu_read_lock();
 		if (atomic_dec_and_test(&cgrp->count) &&
 		    notify_on_release(cgrp)) {
 			if (taskexit)
 				set_bit(CGRP_RELEASABLE, &cgrp->flags);
 			check_for_release(cgrp);
 		}
+		rcu_read_unlock();
 
 		kfree(link);
 	}
-- 
1.8.1.2

[PATCH 062/139] cpuset: fix cpuset_print_task_mems_allowed() vs rename() race

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Li Zefan <lizefan@huawei.com>

commit 63f43f55c9bbc14f76b582644019b8a07dc8219a upstream.

rename() will change dentry->d_name. The result of this race can
be worse than seeing partially rewritten name, but we might access
a stale pointer because rename() will re-allocate memory to hold
a longer name.

It's safe in the protection of dentry->d_lock.

v2: check NULL dentry before acquiring dentry lock.

Signed-off-by: Li Zefan <lizefan@huawei.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 kernel/cpuset.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/kernel/cpuset.c b/kernel/cpuset.c
index 746d1ee..4611da5 100644
--- a/kernel/cpuset.c
+++ b/kernel/cpuset.c
@@ -2468,8 +2468,16 @@ void cpuset_print_task_mems_allowed(struct task_struct *tsk)
 
 	dentry = task_cs(tsk)->css.cgroup->dentry;
 	spin_lock(&cpuset_buffer_lock);
-	snprintf(cpuset_name, CPUSET_NAME_LEN,
-		 dentry ? (const char *)dentry->d_name.name : "/");
+
+	if (!dentry) {
+		strcpy(cpuset_name, "/");
+	} else {
+		spin_lock(&dentry->d_lock);
+		strlcpy(cpuset_name, (const char *)dentry->d_name.name,
+			CPUSET_NAME_LEN);
+		spin_unlock(&dentry->d_lock);
+	}
+
 	nodelist_scnprintf(cpuset_nodelist, CPUSET_NODELIST_LEN,
 			   tsk->mems_allowed);
 	printk(KERN_INFO "%s cpuset=%s mems_allowed=%s\n",
-- 
1.8.1.2

[PATCH 063/139] rtlwifi: usb: allocate URB control message setup_packet and data buffer separately

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>

commit bc6b89237acb3dee6af6e64e51a18255fef89cc2 upstream.

rtlwifi allocates both setup_packet and data buffer of control message urb,
using shared kmalloc in _usbctrl_vendorreq_async_write. Structure used for
allocating is:
	struct {
		u8 data[254];
		struct usb_ctrlrequest dr;
	};

Because 'struct usb_ctrlrequest' is __packed, setup packet is unaligned and
DMA mapping of both 'data' and 'dr' confuses ARM/sunxi, leading to memory
corruptions and freezes.

Patch changes setup packet to be allocated separately.

[v2]:
 - Use WARN_ON_ONCE instead of WARN_ON

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/net/wireless/rtlwifi/usb.c | 44 ++++++++++++++++++++++++--------------
 1 file changed, 28 insertions(+), 16 deletions(-)

diff --git a/drivers/net/wireless/rtlwifi/usb.c b/drivers/net/wireless/rtlwifi/usb.c
index c03a018..d4850b4 100644
--- a/drivers/net/wireless/rtlwifi/usb.c
+++ b/drivers/net/wireless/rtlwifi/usb.c
@@ -42,8 +42,12 @@
 
 static void usbctrl_async_callback(struct urb *urb)
 {
-	if (urb)
-		kfree(urb->context);
+	if (urb) {
+		/* free dr */
+		kfree(urb->setup_packet);
+		/* free databuf */
+		kfree(urb->transfer_buffer);
+	}
 }
 
 static int _usbctrl_vendorreq_async_write(struct usb_device *udev, u8 request,
@@ -55,39 +59,47 @@ static int _usbctrl_vendorreq_async_write(struct usb_device *udev, u8 request,
 	u8 reqtype;
 	struct usb_ctrlrequest *dr;
 	struct urb *urb;
-	struct rtl819x_async_write_data {
-		u8 data[REALTEK_USB_VENQT_MAX_BUF_SIZE];
-		struct usb_ctrlrequest dr;
-	} *buf;
+	const u16 databuf_maxlen = REALTEK_USB_VENQT_MAX_BUF_SIZE;
+	u8 *databuf;
+
+	if (WARN_ON_ONCE(len > databuf_maxlen))
+		len = databuf_maxlen;
 
 	pipe = usb_sndctrlpipe(udev, 0); /* write_out */
 	reqtype =  REALTEK_USB_VENQT_WRITE;
 
-	buf = kmalloc(sizeof(*buf), GFP_ATOMIC);
-	if (!buf)
+	dr = kmalloc(sizeof(*dr), GFP_ATOMIC);
+	if (!dr)
 		return -ENOMEM;
 
+	databuf = kmalloc(databuf_maxlen, GFP_ATOMIC);
+	if (!databuf) {
+		kfree(dr);
+		return -ENOMEM;
+	}
+
 	urb = usb_alloc_urb(0, GFP_ATOMIC);
 	if (!urb) {
-		kfree(buf);
+		kfree(databuf);
+		kfree(dr);
 		return -ENOMEM;
 	}
 
-	dr = &buf->dr;
-
 	dr->bRequestType = reqtype;
 	dr->bRequest = request;
 	dr->wValue = cpu_to_le16(value);
 	dr->wIndex = cpu_to_le16(index);
 	dr->wLength = cpu_to_le16(len);
 	/* data are already in little-endian order */
-	memcpy(buf, pdata, len);
+	memcpy(databuf, pdata, len);
 	usb_fill_control_urb(urb, udev, pipe,
-			     (unsigned char *)dr, buf, len,
-			     usbctrl_async_callback, buf);
+			     (unsigned char *)dr, databuf, len,
+			     usbctrl_async_callback, NULL);
 	rc = usb_submit_urb(urb, GFP_ATOMIC);
-	if (rc < 0)
-		kfree(buf);
+	if (rc < 0) {
+		kfree(databuf);
+		kfree(dr);
+	}
 	usb_free_urb(urb);
 	return rc;
 }
-- 
1.8.1.2

[PATCH 064/139] b43: Increase number of RX DMA slots

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Larry Finger <Larry.Finger@lwfinger.net>

commit ccae0e50c16a7f7adb029c169147400d1ce9f703 upstream.

Bastian Bittorf reported that some of the silent freezes on a Linksys WRT54G
were due to overflow of the RX DMA ring buffer, which was created with 64
slots. That finding reminded me that I was seeing similar crashed on a netbook,
which also has a relatively slow processor. After increasing the number of
slots to 128, runs on the netbook that previously failed now worked; however,
I found that 109 slots had been used in one test. For that reason, the number
of slots is being increased to 256.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Cc: Bastian Bittorf <bittorf@bluebottle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/net/wireless/b43/dma.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/b43/dma.h b/drivers/net/wireless/b43/dma.h
index 315b96e..9fdd198 100644
--- a/drivers/net/wireless/b43/dma.h
+++ b/drivers/net/wireless/b43/dma.h
@@ -169,7 +169,7 @@ struct b43_dmadesc_generic {
 
 /* DMA engine tuning knobs */
 #define B43_TXRING_SLOTS		256
-#define B43_RXRING_SLOTS		64
+#define B43_RXRING_SLOTS		256
 #define B43_DMA0_RX_FW598_BUFSIZE	(B43_DMA0_RX_FW598_FO + IEEE80211_MAX_FRAME_LEN)
 #define B43_DMA0_RX_FW351_BUFSIZE	(B43_DMA0_RX_FW351_FO + IEEE80211_MAX_FRAME_LEN)
 
-- 
1.8.1.2

[PATCH 065/139] futex: Revert "futex: Mark get_robust_list as deprecated"

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Thomas Gleixner <tglx@linutronix.de>

commit fe2b05f7ca9f906be61dced5489f63b8b4d7c770 upstream.

This reverts commit ec0c4274e33c0373e476b73e01995c53128f1257.

get_robust_list() is in use and a removal would break existing user
space. With the permission checks in place it's not longer a security
hole. Remove the deprecation warnings.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Richard Weinberger <richard@nod.at>
Cc: akpm@linux-foundation.org
Cc: paul.gortmaker@windriver.com
Cc: davej@redhat.com
Cc: keescook@chromium.org
Cc: ebiederm@xmission.com
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 kernel/futex.c        | 2 --
 kernel/futex_compat.c | 2 --
 2 files changed, 4 deletions(-)

diff --git a/kernel/futex.c b/kernel/futex.c
index 19eb089..8879430 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -2471,8 +2471,6 @@ SYSCALL_DEFINE3(get_robust_list, int, pid,
 	if (!futex_cmpxchg_enabled)
 		return -ENOSYS;
 
-	WARN_ONCE(1, "deprecated: get_robust_list will be deleted in 2013.\n");
-
 	rcu_read_lock();
 
 	ret = -ESRCH;
diff --git a/kernel/futex_compat.c b/kernel/futex_compat.c
index 83e368b..a9642d5 100644
--- a/kernel/futex_compat.c
+++ b/kernel/futex_compat.c
@@ -142,8 +142,6 @@ compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
 	if (!futex_cmpxchg_enabled)
 		return -ENOSYS;
 
-	WARN_ONCE(1, "deprecated: get_robust_list will be deleted in 2013.\n");
-
 	rcu_read_lock();
 
 	ret = -ESRCH;
-- 
1.8.1.2

[PATCH 066/139] NLM: Ensure that we resend all pending blocking locks after a reclaim

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Trond Myklebust <Trond.Myklebust@netapp.com>

commit 666b3d803a511fbc9bc5e5ea8ce66010cf03ea13 upstream.

Currently, nlmclnt_lock will break out of the for(;;) loop when
the reclaimer wakes up the blocking lock thread by setting
nlm_lck_denied_grace_period. This causes the lock request to fail
with an ENOLCK error.
The intention was always to ensure that we resend the lock request
after the grace period has expired.

Reported-by: Wangyuan Zhang <Wangyuan.Zhang@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 fs/lockd/clntproc.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/fs/lockd/clntproc.c b/fs/lockd/clntproc.c
index 8392cb8..a3a0987 100644
--- a/fs/lockd/clntproc.c
+++ b/fs/lockd/clntproc.c
@@ -551,6 +551,9 @@ again:
 		status = nlmclnt_block(block, req, NLMCLNT_POLL_TIMEOUT);
 		if (status < 0)
 			break;
+		/* Resend the blocking lock request after a server reboot */
+		if (resp->status ==  nlm_lck_denied_grace_period)
+			continue;
 		if (resp->status != nlm_lck_blocked)
 			break;
 	}
-- 
1.8.1.2

[PATCH 067/139] ALSA: hda - hdmi: ELD shouldn't be valid after unplug

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: David Henningsson <david.henningsson@canonical.com>

commit bbfd8a19b6913f50a362457c34d49bfafe5e456e upstream.

Currently, eld_valid is never set to false, except at kernel module
load time. This patch makes sure that eld is no longer valid when
the cable is (hot-)unplugged.

Signed-off-by: David Henningsson <david.henningsson@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 sound/pci/hda/patch_hdmi.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index 063afa2..45e3102 100644
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -995,6 +995,7 @@ static void hdmi_present_sense(struct hdmi_spec_per_pin *per_pin, int repoll)
 		"HDMI status: Codec=%d Pin=%d Presence_Detect=%d ELD_Valid=%d\n",
 		codec->addr, pin_nid, eld->monitor_present, eld_valid);
 
+	eld->eld_valid = false;
 	if (eld_valid) {
 		if (!snd_hdmi_get_eld(eld, codec, pin_nid))
 			snd_hdmi_show_eld(eld);
-- 
1.8.1.2

[PATCH 068/139] xen: close evtchn port if binding to irq fails

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Wei Liu <wei.liu2@citrix.com>

commit e7e44e444876478d50630f57b0c31d29f6725020 upstream.

Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/xen/evtchn.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/xen/evtchn.c b/drivers/xen/evtchn.c
index b1f60a0..b2db77e 100644
--- a/drivers/xen/evtchn.c
+++ b/drivers/xen/evtchn.c
@@ -269,6 +269,14 @@ static int evtchn_bind_to_user(struct per_user_data *u, int port)
 				       u->name, (void *)(unsigned long)port);
 	if (rc >= 0)
 		rc = evtchn_make_refcounted(port);
+	else {
+		/* bind failed, should close the port now */
+		struct evtchn_close close;
+		close.port = port;
+		if (HYPERVISOR_event_channel_op(EVTCHNOP_close, &close) != 0)
+			BUG();
+		set_port_user(port, NULL);
+	}
 
 	return rc;
 }
@@ -277,6 +285,8 @@ static void evtchn_unbind_from_user(struct per_user_data *u, int port)
 {
 	int irq = irq_from_evtchn(port);
 
+	BUG_ON(irq < 0);
+
 	unbind_from_irqhandler(irq, (void *)(unsigned long)port);
 
 	set_port_user(port, NULL);
-- 
1.8.1.2

[PATCH 069/139] xen: Send spinlock IPI to all waiters

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Stefan Bader <stefan.bader@canonical.com>

commit 76eaca031f0af2bb303e405986f637811956a422 upstream.

There is a loophole between Xen's current implementation of
pv-spinlocks and the scheduler. This was triggerable through
a testcase until v3.6 changed the TLB flushing code. The
problem potentially is still there just not observable in the
same way.

What could happen was (is):

1. CPU n tries to schedule task x away and goes into a slow
   wait for the runq lock of CPU n-# (must be one with a lower
   number).
2. CPU n-#, while processing softirqs, tries to balance domains
   and goes into a slow wait for its own runq lock (for updating
   some records). Since this is a spin_lock_irqsave in softirq
   context, interrupts will be re-enabled for the duration of
   the poll_irq hypercall used by Xen.
3. Before the runq lock of CPU n-# is unlocked, CPU n-1 receives
   an interrupt (e.g. endio) and when processing the interrupt,
   tries to wake up task x. But that is in schedule and still
   on_cpu, so try_to_wake_up goes into a tight loop.
4. The runq lock of CPU n-# gets unlocked, but the message only
   gets sent to the first waiter, which is CPU n-# and that is
   busily stuck.
5. CPU n-# never returns from the nested interruption to take and
   release the lock because the scheduler uses a busy wait.
   And CPU n never finishes the task migration because the unlock
   notification only went to CPU n-#.

To avoid this and since the unlocking code has no real sense of
which waiter is best suited to grab the lock, just send the IPI
to all of them. This causes the waiters to return from the hyper-
call (those not interrupted at least) and do active spinlocking.

BugLink: http://bugs.launchpad.net/bugs/1011792

Acked-by: Jan Beulich <JBeulich@suse.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 arch/x86/xen/spinlock.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/arch/x86/xen/spinlock.c b/arch/x86/xen/spinlock.c
index 83e866d..f7a080e 100644
--- a/arch/x86/xen/spinlock.c
+++ b/arch/x86/xen/spinlock.c
@@ -328,7 +328,6 @@ static noinline void xen_spin_unlock_slow(struct xen_spinlock *xl)
 		if (per_cpu(lock_spinners, cpu) == xl) {
 			ADD_STATS(released_slow_kicked, 1);
 			xen_send_IPI_one(cpu, XEN_SPIN_UNLOCK_VECTOR);
-			break;
 		}
 	}
 }
-- 
1.8.1.2

[PATCH 070/139] ALSA: usb: Fix Processing Unit Descriptor parsers

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Pawel Moll <mail@pawelmoll.com>

commit b531f81b0d70ffbe8d70500512483227cc532608 upstream.

Commit 99fc86450c439039d2ef88d06b222fd51a779176 "ALSA: usb-mixer:
parse descriptors with structs" introduced a set of useful parsers
for descriptors. Unfortunately the parses for the Processing Unit
Descriptor came with a very subtle bug...

Functions uac_processing_unit_iProcessing() and
uac_processing_unit_specific() were indexing the baSourceID array
forgetting the fields before the iProcessing and process-specific
descriptors.

The problem was observed with Sound Blaster Extigy mixer,
where nNrModes in Up/Down-mix Processing Unit Descriptor
was accessed at offset 10 of the descriptor (value 0)
instead of offset 15 (value 7). In result the resulting
control had interesting limit values:

Simple mixer control 'Channel Routing Mode Select',0
  Capabilities: volume volume-joined penum
  Playback channels: Mono
  Capture channels: Mono
  Limits: 0 - -1
  Mono: -1 [100%]

Fixed by starting from the bmControls, which was calculated
correctly, instead of baSourceID.

Now the mentioned control is fine:

Simple mixer control 'Channel Routing Mode Select',0
  Capabilities: volume volume-joined penum
  Playback channels: Mono
  Capture channels: Mono
  Limits: 0 - 6
  Mono: 0 [0%]

Signed-off-by: Pawel Moll <mail@pawelmoll.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
[ luis: include/uapi/linux/usb/audio.h -> include/linux/usb/audio.h,
  adjust context ]
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 include/linux/usb/audio.h | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/include/linux/usb/audio.h b/include/linux/usb/audio.h
index a54b825..6f8b026 100644
--- a/include/linux/usb/audio.h
+++ b/include/linux/usb/audio.h
@@ -384,14 +384,16 @@ static inline __u8 uac_processing_unit_iProcessing(struct uac_processing_unit_de
 						   int protocol)
 {
 	__u8 control_size = uac_processing_unit_bControlSize(desc, protocol);
-	return desc->baSourceID[desc->bNrInPins + control_size];
+	return *(uac_processing_unit_bmControls(desc, protocol)
+			+ control_size);
 }
 
 static inline __u8 *uac_processing_unit_specific(struct uac_processing_unit_descriptor *desc,
 						 int protocol)
 {
 	__u8 control_size = uac_processing_unit_bControlSize(desc, protocol);
-	return &desc->baSourceID[desc->bNrInPins + control_size + 1];
+	return uac_processing_unit_bmControls(desc, protocol)
+			+ control_size + 1;
 }
 
 /* 4.5.2 Class-Specific AS Interface Descriptor */
-- 
1.8.1.2

[PATCH 071/139] inotify: remove broken mask checks causing unmount to be EINVAL

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jim Somerville <Jim.Somerville@windriver.com>

commit 676a0675cf9200ac047fb50825f80867b3bb733b upstream.

Running the command:

	inotifywait -e unmount /mnt/disk

immediately aborts with a -EINVAL return code.  This is however a valid
parameter.  This abort occurs only if unmount is the sole event
parameter.  If other event parameters are supplied, then the unmount
event wait will work.

The problem was introduced by commit 44b350fc23e ("inotify: Fix mask
checks").  In that commit, it states:

	The mask checks in inotify_update_existing_watch() and
	inotify_new_watch() are useless because inotify_arg_to_mask()
	sets FS_IN_IGNORED and FS_EVENT_ON_CHILD bits anyway.

But instead of removing the useless checks, it did this:

	        mask = inotify_arg_to_mask(arg);
	-       if (unlikely(!mask))
	+       if (unlikely(!(mask & IN_ALL_EVENTS)))
	                return -EINVAL;

The problem is that IN_ALL_EVENTS doesn't include IN_UNMOUNT, and other
parts of the code keep IN_UNMOUNT separate from IN_ALL_EVENTS.  So the
check should be:

	if (unlikely(!(mask & (IN_ALL_EVENTS | IN_UNMOUNT))))

But inotify_arg_to_mask(arg) always sets the IN_UNMOUNT bit in the mask
anyway, so the check is always going to pass and thus should simply be
removed.  Also note that inotify_arg_to_mask completely controls what
mask bits get set from arg, there's no way for invalid bits to get
enabled there.

Lets fix it by simply removing the useless broken checks.

Signed-off-by: Jim Somerville <Jim.Somerville@windriver.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: Jerome Marchand <jmarchan@redhat.com>
Cc: John McCutchan <john@johnmccutchan.com>
Cc: Robert Love <rlove@rlove.org>
Cc: Eric Paris <eparis@parisplace.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 fs/notify/inotify/inotify_user.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/fs/notify/inotify/inotify_user.c b/fs/notify/inotify/inotify_user.c
index 8445fbc..6f292dd 100644
--- a/fs/notify/inotify/inotify_user.c
+++ b/fs/notify/inotify/inotify_user.c
@@ -579,8 +579,6 @@ static int inotify_update_existing_watch(struct fsnotify_group *group,
 
 	/* don't allow invalid bits: we don't want flags set */
 	mask = inotify_arg_to_mask(arg);
-	if (unlikely(!(mask & IN_ALL_EVENTS)))
-		return -EINVAL;
 
 	fsn_mark = fsnotify_find_inode_mark(group, inode);
 	if (!fsn_mark)
@@ -632,8 +630,6 @@ static int inotify_new_watch(struct fsnotify_group *group,
 
 	/* don't allow invalid bits: we don't want flags set */
 	mask = inotify_arg_to_mask(arg);
-	if (unlikely(!(mask & IN_ALL_EVENTS)))
-		return -EINVAL;
 
 	tmp_i_mark = kmem_cache_alloc(inotify_inode_mark_cachep, GFP_KERNEL);
 	if (unlikely(!tmp_i_mark))
-- 
1.8.1.2

[PATCH 072/139] fs/block_dev.c: page cache wrongly left invalidated after revalidate_disk()

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: MITSUNARI Shigeo <herumi@nifty.com>

commit 7630b661da330b35dd57b6f5d6d62b386f2dd751 upstream.

We found that bdev->bd_invalidated was left set once revalidate_disk()
is called, which results in page cache flush every time that device is
open.

Specifically, we found this problem in MD block device.  Once we resize
a MD device, mdadm --monitor periodically flush all page cache for that
device every 60 or 1000 seconds when it opens the device.

This bug lies since at least 3.2.0 till the latest kernel(3.6.2).  Patch
is attached.

The following steps will reproduce the problem.

1. prepair a block device (eg /dev/sdb).

2. create two partitions:

   sudo parted /dev/sdb
   mklabel gpt
   mkpart primary 0% 50%
   mkpart primary 50% 100%

3. create a md device.

   sudo mdadm -C /dev/md/hoge -l 1 -n 2 -e 1.2 --assume-clean --auto=md --symlink=no /dev/sdb1 /dev/sdb2

4. create file system and mount it

   sudo mkfs.ext3 /dev/md/hoge
   sudo mkdir /mnt/test
   sudo mount /dev/md/hoge /mnt/test

5. try to resize the device

   sudo mdadm -G /dev/md/hoge --size=max

6. create a file to fill file cache.

  sudo dd if=/dev/urandom of=/mnt/test/data bs=1M count=10

and verify the current status of file by free command.

7. mdadm monitor will open the md device every 1000 seconds and you
   will find all file cache on the device are cleared.

The timing can be reduced by the following steps.

a) kill mdadm and restart it with --delay option

   /sbin/mdadm --monitor --delay=30 --pid-file /var/run/mdadm/monitor.pid --daemonise --scan --syslog

or open the md device directly.

   sudo dd if=/dev/md/hoge of=/dev/null bs=4096 count=1

Signed-off-by: MITSUNARI Shigeo <herumi@nifty.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 fs/block_dev.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/block_dev.c b/fs/block_dev.c
index c2bbe1f..db64e31 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -1047,6 +1047,7 @@ int revalidate_disk(struct gendisk *disk)
 
 	mutex_lock(&bdev->bd_mutex);
 	check_disk_size_change(disk, bdev);
+	bdev->bd_invalidated = 0;
 	mutex_unlock(&bdev->bd_mutex);
 	bdput(bdev);
 	return ret;
-- 
1.8.1.2

[PATCH 073/139] ocfs2: unlock super lock if lockres refresh failed

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Junxiao Bi <junxiao.bi@oracle.com>

commit 3278bb748d2437eb1464765f36429e5d6aa91c38 upstream.

If lockres refresh failed, the super lock will never be released which
will cause some processes on other cluster nodes hung forever.

Signed-off-by: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Mark Fasheh <mfasheh@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 fs/ocfs2/dlmglue.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c
index 4f7795f..88577eb 100644
--- a/fs/ocfs2/dlmglue.c
+++ b/fs/ocfs2/dlmglue.c
@@ -2545,6 +2545,7 @@ int ocfs2_super_lock(struct ocfs2_super *osb,
 	 * everything is up to the caller :) */
 	status = ocfs2_should_refresh_lock_res(lockres);
 	if (status < 0) {
+		ocfs2_cluster_unlock(osb, lockres, level);
 		mlog_errno(status);
 		goto bail;
 	}
@@ -2553,8 +2554,10 @@ int ocfs2_super_lock(struct ocfs2_super *osb,
 
 		ocfs2_complete_lock_res_refresh(lockres, status);
 
-		if (status < 0)
+		if (status < 0) {
+			ocfs2_cluster_unlock(osb, lockres, level);
 			mlog_errno(status);
+		}
 		ocfs2_track_lock_refresh(lockres);
 	}
 bail:
-- 
1.8.1.2

[PATCH 074/139] drivers/video/backlight/adp88?0_bl.c: fix resume

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Lars-Peter Clausen <lars@metafoo.de>

commit 5eb02c01bd1f3ef195989ab05e835e2b0711b5a9 upstream.

Clearing the NSTBY bit in the control register also automatically clears
the BLEN bit.  So we need to make sure to set it again during resume,
otherwise the backlight will stay off.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/video/backlight/adp8860_bl.c | 2 +-
 drivers/video/backlight/adp8870_bl.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/video/backlight/adp8860_bl.c b/drivers/video/backlight/adp8860_bl.c
index 77d1fdb..716daaa 100644
--- a/drivers/video/backlight/adp8860_bl.c
+++ b/drivers/video/backlight/adp8860_bl.c
@@ -783,7 +783,7 @@ static int adp8860_i2c_suspend(struct i2c_client *client, pm_message_t message)
 
 static int adp8860_i2c_resume(struct i2c_client *client)
 {
-	adp8860_set_bits(client, ADP8860_MDCR, NSTBY);
+	adp8860_set_bits(client, ADP8860_MDCR, NSTBY | BLEN);
 
 	return 0;
 }
diff --git a/drivers/video/backlight/adp8870_bl.c b/drivers/video/backlight/adp8870_bl.c
index edf7f91..f58a189 100644
--- a/drivers/video/backlight/adp8870_bl.c
+++ b/drivers/video/backlight/adp8870_bl.c
@@ -957,7 +957,7 @@ static int adp8870_i2c_suspend(struct i2c_client *client, pm_message_t message)
 
 static int adp8870_i2c_resume(struct i2c_client *client)
 {
-	adp8870_set_bits(client, ADP8870_MDCR, NSTBY);
+	adp8870_set_bits(client, ADP8870_MDCR, NSTBY | BLEN);
 
 	return 0;
 }
-- 
1.8.1.2

[PATCH 075/139] powerpc/kexec: Disable hard IRQ before kexec

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Phileas Fogg <phileas-fogg@mail.ru>

commit 8520e443aa56cc157b015205ea53e7b9fc831291 upstream.

Disable hard IRQ before kexec a new kernel image.
Not doing it can result in corrupted data in the memory segments
reserved for the new kernel.

Signed-off-by: Phileas Fogg <phileas-fogg@mail.ru>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 arch/powerpc/kernel/machine_kexec_64.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/powerpc/kernel/machine_kexec_64.c b/arch/powerpc/kernel/machine_kexec_64.c
index d7f6090..39833e0 100644
--- a/arch/powerpc/kernel/machine_kexec_64.c
+++ b/arch/powerpc/kernel/machine_kexec_64.c
@@ -162,6 +162,8 @@ static int kexec_all_irq_disabled = 0;
 static void kexec_smp_down(void *arg)
 {
 	local_irq_disable();
+	hard_irq_disable();
+
 	mb(); /* make sure our irqs are disabled before we say they are */
 	get_paca()->kexec_state = KEXEC_STATE_IRQS_OFF;
 	while(kexec_all_irq_disabled == 0)
@@ -244,6 +246,8 @@ static void kexec_prepare_cpus(void)
 	wake_offline_cpus();
 	smp_call_function(kexec_smp_down, NULL, /* wait */0);
 	local_irq_disable();
+	hard_irq_disable();
+
 	mb(); /* make sure IRQs are disabled before we say they are */
 	get_paca()->kexec_state = KEXEC_STATE_IRQS_OFF;
 
@@ -281,6 +285,7 @@ static void kexec_prepare_cpus(void)
 	if (ppc_md.kexec_cpu_down)
 		ppc_md.kexec_cpu_down(0, 0);
 	local_irq_disable();
+	hard_irq_disable();
 }
 
 #endif /* SMP */
-- 
1.8.1.2

[PATCH 076/139] mm: mmu_notifier: have mmu_notifiers use a global SRCU so they may safely schedule

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Sagi Grimberg <sagig@mellanox.co.il>

commit 21a92735f660eaecf69a6f2e777f18463760ec32 upstream.

With an RCU based mmu_notifier implementation, any callout to
mmu_notifier_invalidate_range_{start,end}() or
mmu_notifier_invalidate_page() would not be allowed to call schedule()
as that could potentially allow a modification to the mmu_notifier
structure while it is currently being used.

Since srcu allocs 4 machine words per instance per cpu, we may end up
with memory exhaustion if we use srcu per mm.  So all mms share a global
srcu.  Note that during large mmu_notifier activity exit & unregister
paths might hang for longer periods, but it is tolerable for current
mmu_notifier clients.

Signed-off-by: Sagi Grimberg <sagig@mellanox.co.il>
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Haggai Eran <haggaie@mellanox.com>
Cc: "Paul E. McKenney" <paulmck@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 include/linux/mmu_notifier.h |  1 +
 mm/mmu_notifier.c            | 73 +++++++++++++++++++++++++++++---------------
 2 files changed, 49 insertions(+), 25 deletions(-)

diff --git a/include/linux/mmu_notifier.h b/include/linux/mmu_notifier.h
index 1d1b1e1..ee2baf0 100644
--- a/include/linux/mmu_notifier.h
+++ b/include/linux/mmu_notifier.h
@@ -4,6 +4,7 @@
 #include <linux/list.h>
 #include <linux/spinlock.h>
 #include <linux/mm_types.h>
+#include <linux/srcu.h>
 
 struct mmu_notifier;
 struct mmu_notifier_ops;
diff --git a/mm/mmu_notifier.c b/mm/mmu_notifier.c
index 862b608..35ff447 100644
--- a/mm/mmu_notifier.c
+++ b/mm/mmu_notifier.c
@@ -14,10 +14,14 @@
 #include <linux/export.h>
 #include <linux/mm.h>
 #include <linux/err.h>
+#include <linux/srcu.h>
 #include <linux/rcupdate.h>
 #include <linux/sched.h>
 #include <linux/slab.h>
 
+/* global SRCU for all MMs */
+struct srcu_struct srcu;
+
 /*
  * This function can't run concurrently against mmu_notifier_register
  * because mm->mm_users > 0 during mmu_notifier_register and exit_mmap
@@ -25,8 +29,8 @@
  * in parallel despite there being no task using this mm any more,
  * through the vmas outside of the exit_mmap context, such as with
  * vmtruncate. This serializes against mmu_notifier_unregister with
- * the mmu_notifier_mm->lock in addition to RCU and it serializes
- * against the other mmu notifiers with RCU. struct mmu_notifier_mm
+ * the mmu_notifier_mm->lock in addition to SRCU and it serializes
+ * against the other mmu notifiers with SRCU. struct mmu_notifier_mm
  * can't go away from under us as exit_mmap holds an mm_count pin
  * itself.
  */
@@ -34,12 +38,13 @@ void __mmu_notifier_release(struct mm_struct *mm)
 {
 	struct mmu_notifier *mn;
 	struct hlist_node *n;
+	int id;
 
 	/*
 	 * RCU here will block mmu_notifier_unregister until
 	 * ->release returns.
 	 */
-	rcu_read_lock();
+	id = srcu_read_lock(&srcu);
 	hlist_for_each_entry_rcu(mn, n, &mm->mmu_notifier_mm->list, hlist)
 		/*
 		 * if ->release runs before mmu_notifier_unregister it
@@ -50,7 +55,7 @@ void __mmu_notifier_release(struct mm_struct *mm)
 		 */
 		if (mn->ops->release)
 			mn->ops->release(mn, mm);
-	rcu_read_unlock();
+	srcu_read_unlock(&srcu, id);
 
 	spin_lock(&mm->mmu_notifier_mm->lock);
 	while (unlikely(!hlist_empty(&mm->mmu_notifier_mm->list))) {
@@ -68,7 +73,7 @@ void __mmu_notifier_release(struct mm_struct *mm)
 	spin_unlock(&mm->mmu_notifier_mm->lock);
 
 	/*
-	 * synchronize_rcu here prevents mmu_notifier_release to
+	 * synchronize_srcu here prevents mmu_notifier_release to
 	 * return to exit_mmap (which would proceed freeing all pages
 	 * in the mm) until the ->release method returns, if it was
 	 * invoked by mmu_notifier_unregister.
@@ -76,7 +81,7 @@ void __mmu_notifier_release(struct mm_struct *mm)
 	 * The mmu_notifier_mm can't go away from under us because one
 	 * mm_count is hold by exit_mmap.
 	 */
-	synchronize_rcu();
+	synchronize_srcu(&srcu);
 }
 
 /*
@@ -89,14 +94,14 @@ int __mmu_notifier_clear_flush_young(struct mm_struct *mm,
 {
 	struct mmu_notifier *mn;
 	struct hlist_node *n;
-	int young = 0;
+	int young = 0, id;
 
-	rcu_read_lock();
+	id = srcu_read_lock(&srcu);
 	hlist_for_each_entry_rcu(mn, n, &mm->mmu_notifier_mm->list, hlist) {
 		if (mn->ops->clear_flush_young)
 			young |= mn->ops->clear_flush_young(mn, mm, address);
 	}
-	rcu_read_unlock();
+	srcu_read_unlock(&srcu, id);
 
 	return young;
 }
@@ -106,9 +111,9 @@ int __mmu_notifier_test_young(struct mm_struct *mm,
 {
 	struct mmu_notifier *mn;
 	struct hlist_node *n;
-	int young = 0;
+	int young = 0, id;
 
-	rcu_read_lock();
+	id = srcu_read_lock(&srcu);
 	hlist_for_each_entry_rcu(mn, n, &mm->mmu_notifier_mm->list, hlist) {
 		if (mn->ops->test_young) {
 			young = mn->ops->test_young(mn, mm, address);
@@ -116,7 +121,7 @@ int __mmu_notifier_test_young(struct mm_struct *mm,
 				break;
 		}
 	}
-	rcu_read_unlock();
+	srcu_read_unlock(&srcu, id);
 
 	return young;
 }
@@ -126,8 +131,9 @@ void __mmu_notifier_change_pte(struct mm_struct *mm, unsigned long address,
 {
 	struct mmu_notifier *mn;
 	struct hlist_node *n;
+	int id;
 
-	rcu_read_lock();
+	id = srcu_read_lock(&srcu);
 	hlist_for_each_entry_rcu(mn, n, &mm->mmu_notifier_mm->list, hlist) {
 		if (mn->ops->change_pte)
 			mn->ops->change_pte(mn, mm, address, pte);
@@ -138,7 +144,7 @@ void __mmu_notifier_change_pte(struct mm_struct *mm, unsigned long address,
 		else if (mn->ops->invalidate_page)
 			mn->ops->invalidate_page(mn, mm, address);
 	}
-	rcu_read_unlock();
+	srcu_read_unlock(&srcu, id);
 }
 
 void __mmu_notifier_invalidate_page(struct mm_struct *mm,
@@ -146,13 +152,14 @@ void __mmu_notifier_invalidate_page(struct mm_struct *mm,
 {
 	struct mmu_notifier *mn;
 	struct hlist_node *n;
+	int id;
 
-	rcu_read_lock();
+	id = srcu_read_lock(&srcu);
 	hlist_for_each_entry_rcu(mn, n, &mm->mmu_notifier_mm->list, hlist) {
 		if (mn->ops->invalidate_page)
 			mn->ops->invalidate_page(mn, mm, address);
 	}
-	rcu_read_unlock();
+	srcu_read_unlock(&srcu, id);
 }
 
 void __mmu_notifier_invalidate_range_start(struct mm_struct *mm,
@@ -160,13 +167,14 @@ void __mmu_notifier_invalidate_range_start(struct mm_struct *mm,
 {
 	struct mmu_notifier *mn;
 	struct hlist_node *n;
+	int id;
 
-	rcu_read_lock();
+	id = srcu_read_lock(&srcu);
 	hlist_for_each_entry_rcu(mn, n, &mm->mmu_notifier_mm->list, hlist) {
 		if (mn->ops->invalidate_range_start)
 			mn->ops->invalidate_range_start(mn, mm, start, end);
 	}
-	rcu_read_unlock();
+	srcu_read_unlock(&srcu, id);
 }
 
 void __mmu_notifier_invalidate_range_end(struct mm_struct *mm,
@@ -174,13 +182,14 @@ void __mmu_notifier_invalidate_range_end(struct mm_struct *mm,
 {
 	struct mmu_notifier *mn;
 	struct hlist_node *n;
+	int id;
 
-	rcu_read_lock();
+	id = srcu_read_lock(&srcu);
 	hlist_for_each_entry_rcu(mn, n, &mm->mmu_notifier_mm->list, hlist) {
 		if (mn->ops->invalidate_range_end)
 			mn->ops->invalidate_range_end(mn, mm, start, end);
 	}
-	rcu_read_unlock();
+	srcu_read_unlock(&srcu, id);
 }
 
 static int do_mmu_notifier_register(struct mmu_notifier *mn,
@@ -192,6 +201,12 @@ static int do_mmu_notifier_register(struct mmu_notifier *mn,
 
 	BUG_ON(atomic_read(&mm->mm_users) <= 0);
 
+	/*
+	* Verify that mmu_notifier_init() already run and the global srcu is
+	* initialized.
+	*/
+	BUG_ON(!srcu.per_cpu_ref);
+
 	ret = -ENOMEM;
 	mmu_notifier_mm = kmalloc(sizeof(struct mmu_notifier_mm), GFP_KERNEL);
 	if (unlikely(!mmu_notifier_mm))
@@ -274,8 +289,8 @@ void __mmu_notifier_mm_destroy(struct mm_struct *mm)
 /*
  * This releases the mm_count pin automatically and frees the mm
  * structure if it was the last user of it. It serializes against
- * running mmu notifiers with RCU and against mmu_notifier_unregister
- * with the unregister lock + RCU. All sptes must be dropped before
+ * running mmu notifiers with SRCU and against mmu_notifier_unregister
+ * with the unregister lock + SRCU. All sptes must be dropped before
  * calling mmu_notifier_unregister. ->release or any other notifier
  * method may be invoked concurrently with mmu_notifier_unregister,
  * and only after mmu_notifier_unregister returned we're guaranteed
@@ -290,8 +305,9 @@ void mmu_notifier_unregister(struct mmu_notifier *mn, struct mm_struct *mm)
 		 * RCU here will force exit_mmap to wait ->release to finish
 		 * before freeing the pages.
 		 */
-		rcu_read_lock();
+		int id;
 
+		id = srcu_read_lock(&srcu);
 		/*
 		 * exit_mmap will block in mmu_notifier_release to
 		 * guarantee ->release is called before freeing the
@@ -299,7 +315,7 @@ void mmu_notifier_unregister(struct mmu_notifier *mn, struct mm_struct *mm)
 		 */
 		if (mn->ops->release)
 			mn->ops->release(mn, mm);
-		rcu_read_unlock();
+		srcu_read_unlock(&srcu, id);
 
 		spin_lock(&mm->mmu_notifier_mm->lock);
 		hlist_del_rcu(&mn->hlist);
@@ -310,10 +326,17 @@ void mmu_notifier_unregister(struct mmu_notifier *mn, struct mm_struct *mm)
 	 * Wait any running method to finish, of course including
 	 * ->release if it was run by mmu_notifier_relase instead of us.
 	 */
-	synchronize_rcu();
+	synchronize_srcu(&srcu);
 
 	BUG_ON(atomic_read(&mm->mm_count) <= 0);
 
 	mmdrop(mm);
 }
 EXPORT_SYMBOL_GPL(mmu_notifier_unregister);
+
+static int __init mmu_notifier_init(void)
+{
+	return init_srcu_struct(&srcu);
+}
+
+module_init(mmu_notifier_init);
-- 
1.8.1.2

[PATCH 077/139] mm: mmu_notifier: make the mmu_notifier srcu static

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Andrea Arcangeli <aarcange@redhat.com>

commit 70400303ce0c4ced3139499c676d5c79636b0c72 upstream.

The variable must be static especially given the variable name.

s/RCU/SRCU/ over a few comments.

Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Cc: Sagi Grimberg <sagig@mellanox.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 mm/mmu_notifier.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/mm/mmu_notifier.c b/mm/mmu_notifier.c
index 35ff447..3775c90 100644
--- a/mm/mmu_notifier.c
+++ b/mm/mmu_notifier.c
@@ -20,7 +20,7 @@
 #include <linux/slab.h>
 
 /* global SRCU for all MMs */
-struct srcu_struct srcu;
+static struct srcu_struct srcu;
 
 /*
  * This function can't run concurrently against mmu_notifier_register
@@ -41,7 +41,7 @@ void __mmu_notifier_release(struct mm_struct *mm)
 	int id;
 
 	/*
-	 * RCU here will block mmu_notifier_unregister until
+	 * SRCU here will block mmu_notifier_unregister until
 	 * ->release returns.
 	 */
 	id = srcu_read_lock(&srcu);
@@ -302,7 +302,7 @@ void mmu_notifier_unregister(struct mmu_notifier *mn, struct mm_struct *mm)
 
 	if (!hlist_unhashed(&mn->hlist)) {
 		/*
-		 * RCU here will force exit_mmap to wait ->release to finish
+		 * SRCU here will force exit_mmap to wait ->release to finish
 		 * before freeing the pages.
 		 */
 		int id;
-- 
1.8.1.2

[PATCH 078/139] mmu_notifier_unregister NULL Pointer deref and multiple ->release() callouts

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Robin Holt <holt@sgi.com>

commit 751efd8610d3d7d67b7bdf7f62646edea7365dd7 upstream.

There is a race condition between mmu_notifier_unregister() and
__mmu_notifier_release().

Assume two tasks, one calling mmu_notifier_unregister() as a result of a
filp_close() ->flush() callout (task A), and the other calling
mmu_notifier_release() from an mmput() (task B).

                A                               B
t1                                              srcu_read_lock()
t2              if (!hlist_unhashed())
t3                                              srcu_read_unlock()
t4              srcu_read_lock()
t5                                              hlist_del_init_rcu()
t6                                              synchronize_srcu()
t7              srcu_read_unlock()
t8              hlist_del_rcu()  <--- NULL pointer deref.

Additionally, the list traversal in __mmu_notifier_release() is not
protected by the by the mmu_notifier_mm->hlist_lock which can result in
callouts to the ->release() notifier from both mmu_notifier_unregister()
and __mmu_notifier_release().

-stable suggestions:

The stable trees prior to 3.7.y need commits 21a92735f660 and
70400303ce0c cherry-picked in that order prior to cherry-picking this
commit.  The 3.7.y tree already has those two commits.

Signed-off-by: Robin Holt <holt@sgi.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Wanpeng Li <liwanp@linux.vnet.ibm.com>
Cc: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Cc: Avi Kivity <avi@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Sagi Grimberg <sagig@mellanox.co.il>
Cc: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 mm/mmu_notifier.c | 82 ++++++++++++++++++++++++++++---------------------------
 1 file changed, 42 insertions(+), 40 deletions(-)

diff --git a/mm/mmu_notifier.c b/mm/mmu_notifier.c
index 3775c90..8d1ca2d 100644
--- a/mm/mmu_notifier.c
+++ b/mm/mmu_notifier.c
@@ -37,49 +37,51 @@ static struct srcu_struct srcu;
 void __mmu_notifier_release(struct mm_struct *mm)
 {
 	struct mmu_notifier *mn;
-	struct hlist_node *n;
 	int id;
 
 	/*
-	 * SRCU here will block mmu_notifier_unregister until
-	 * ->release returns.
+	 * srcu_read_lock() here will block synchronize_srcu() in
+	 * mmu_notifier_unregister() until all registered
+	 * ->release() callouts this function makes have
+	 * returned.
 	 */
 	id = srcu_read_lock(&srcu);
-	hlist_for_each_entry_rcu(mn, n, &mm->mmu_notifier_mm->list, hlist)
-		/*
-		 * if ->release runs before mmu_notifier_unregister it
-		 * must be handled as it's the only way for the driver
-		 * to flush all existing sptes and stop the driver
-		 * from establishing any more sptes before all the
-		 * pages in the mm are freed.
-		 */
-		if (mn->ops->release)
-			mn->ops->release(mn, mm);
-	srcu_read_unlock(&srcu, id);
-
 	spin_lock(&mm->mmu_notifier_mm->lock);
 	while (unlikely(!hlist_empty(&mm->mmu_notifier_mm->list))) {
 		mn = hlist_entry(mm->mmu_notifier_mm->list.first,
 				 struct mmu_notifier,
 				 hlist);
+
 		/*
-		 * We arrived before mmu_notifier_unregister so
-		 * mmu_notifier_unregister will do nothing other than
-		 * to wait ->release to finish and
-		 * mmu_notifier_unregister to return.
+		 * Unlink.  This will prevent mmu_notifier_unregister()
+		 * from also making the ->release() callout.
 		 */
 		hlist_del_init_rcu(&mn->hlist);
+		spin_unlock(&mm->mmu_notifier_mm->lock);
+
+		/*
+		 * Clear sptes. (see 'release' description in mmu_notifier.h)
+		 */
+		if (mn->ops->release)
+			mn->ops->release(mn, mm);
+
+		spin_lock(&mm->mmu_notifier_mm->lock);
 	}
 	spin_unlock(&mm->mmu_notifier_mm->lock);
 
 	/*
-	 * synchronize_srcu here prevents mmu_notifier_release to
-	 * return to exit_mmap (which would proceed freeing all pages
-	 * in the mm) until the ->release method returns, if it was
-	 * invoked by mmu_notifier_unregister.
-	 *
-	 * The mmu_notifier_mm can't go away from under us because one
-	 * mm_count is hold by exit_mmap.
+	 * All callouts to ->release() which we have done are complete.
+	 * Allow synchronize_srcu() in mmu_notifier_unregister() to complete
+	 */
+	srcu_read_unlock(&srcu, id);
+
+	/*
+	 * mmu_notifier_unregister() may have unlinked a notifier and may
+	 * still be calling out to it.	Additionally, other notifiers
+	 * may have been active via vmtruncate() et. al. Block here
+	 * to ensure that all notifier callouts for this mm have been
+	 * completed and the sptes are really cleaned up before returning
+	 * to exit_mmap().
 	 */
 	synchronize_srcu(&srcu);
 }
@@ -300,31 +302,31 @@ void mmu_notifier_unregister(struct mmu_notifier *mn, struct mm_struct *mm)
 {
 	BUG_ON(atomic_read(&mm->mm_count) <= 0);
 
+	spin_lock(&mm->mmu_notifier_mm->lock);
 	if (!hlist_unhashed(&mn->hlist)) {
-		/*
-		 * SRCU here will force exit_mmap to wait ->release to finish
-		 * before freeing the pages.
-		 */
 		int id;
 
-		id = srcu_read_lock(&srcu);
 		/*
-		 * exit_mmap will block in mmu_notifier_release to
-		 * guarantee ->release is called before freeing the
-		 * pages.
+		 * Ensure we synchronize up with __mmu_notifier_release().
 		 */
+		id = srcu_read_lock(&srcu);
+
+		hlist_del_rcu(&mn->hlist);
+		spin_unlock(&mm->mmu_notifier_mm->lock);
+
 		if (mn->ops->release)
 			mn->ops->release(mn, mm);
-		srcu_read_unlock(&srcu, id);
 
-		spin_lock(&mm->mmu_notifier_mm->lock);
-		hlist_del_rcu(&mn->hlist);
+		/*
+		 * Allow __mmu_notifier_release() to complete.
+		 */
+		srcu_read_unlock(&srcu, id);
+	} else
 		spin_unlock(&mm->mmu_notifier_mm->lock);
-	}
 
 	/*
-	 * Wait any running method to finish, of course including
-	 * ->release if it was run by mmu_notifier_relase instead of us.
+	 * Wait for any running method to finish, including ->release() if it
+	 * was run by __mmu_notifier_release() instead of us.
 	 */
 	synchronize_srcu(&srcu);
 
-- 
1.8.1.2

[PATCH 079/139] mm/fadvise.c: drain all pagevecs if POSIX_FADV_DONTNEED fails to discard all pages

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Mel Gorman <mgorman@suse.de>

commit 67d46b296a1ba1477c0df8ff3bc5e0167a0b0732 upstream.

Rob van der Heij reported the following (paraphrased) on private mail.

	The scenario is that I want to avoid backups to fill up the page
	cache and purge stuff that is more likely to be used again (this is
	with s390x Linux on z/VM, so I don't give it as much memory that
	we don't care anymore). So I have something with LD_PRELOAD that
	intercepts the close() call (from tar, in this case) and issues
	a posix_fadvise() just before closing the file.

	This mostly works, except for small files (less than 14 pages)
	that remains in page cache after the face.

Unfortunately Rob has not had a chance to test this exact patch but the
test program below should be reproducing the problem he described.

The issue is the per-cpu pagevecs for LRU additions.  If the pages are
added by one CPU but fadvise() is called on another then the pages
remain resident as the invalidate_mapping_pages() only drains the local
pagevecs via its call to pagevec_release().  The user-visible effect is
that a program that uses fadvise() properly is not obeyed.

A possible fix for this is to put the necessary smarts into
invalidate_mapping_pages() to globally drain the LRU pagevecs if a
pagevec page could not be discarded.  The downside with this is that an
inode cache shrink would send a global IPI and memory pressure
potentially causing global IPI storms is very undesirable.

Instead, this patch adds a check during fadvise(POSIX_FADV_DONTNEED) to
check if invalidate_mapping_pages() discarded all the requested pages.
If a subset of pages are discarded it drains the LRU pagevecs and tries
again.  If the second attempt fails, it assumes it is due to the pages
being mapped, locked or dirty and does not care.  With this patch, an
application using fadvise() correctly will be obeyed but there is a
downside that a malicious application can force the kernel to send
global IPIs and increase overhead.

If accepted, I would like this to be considered as a -stable candidate.
It's not an urgent issue but it's a system call that is not working as
advertised which is weak.

The following test program demonstrates the problem.  It should never
report that pages are still resident but will without this patch.  It
assumes that CPU 0 and 1 exist.

int main() {
	int fd;
	int pagesize = getpagesize();
	ssize_t written = 0, expected;
	char *buf;
	unsigned char *vec;
	int resident, i;
	cpu_set_t set;

	/* Prepare a buffer for writing */
	expected = FILESIZE_PAGES * pagesize;
	buf = malloc(expected + 1);
	if (buf == NULL) {
		printf("ENOMEM\n");
		exit(EXIT_FAILURE);
	}
	buf[expected] = 0;
	memset(buf, 'a', expected);

	/* Prepare the mincore vec */
	vec = malloc(FILESIZE_PAGES);
	if (vec == NULL) {
		printf("ENOMEM\n");
		exit(EXIT_FAILURE);
	}

	/* Bind ourselves to CPU 0 */
	CPU_ZERO(&set);
	CPU_SET(0, &set);
	if (sched_setaffinity(getpid(), sizeof(set), &set) == -1) {
		perror("sched_setaffinity");
		exit(EXIT_FAILURE);
	}

	/* open file, unlink and write buffer */
	fd = open("fadvise-test-file", O_CREAT|O_EXCL|O_RDWR);
	if (fd == -1) {
		perror("open");
		exit(EXIT_FAILURE);
	}
	unlink("fadvise-test-file");
	while (written < expected) {
		ssize_t this_write;
		this_write = write(fd, buf + written, expected - written);

		if (this_write == -1) {
			perror("write");
			exit(EXIT_FAILURE);
		}

		written += this_write;
	}
	free(buf);

	/*
	 * Force ourselves to another CPU. If fadvise only flushes the local
	 * CPUs pagevecs then the fadvise will fail to discard all file pages
	 */
	CPU_ZERO(&set);
	CPU_SET(1, &set);
	if (sched_setaffinity(getpid(), sizeof(set), &set) == -1) {
		perror("sched_setaffinity");
		exit(EXIT_FAILURE);
	}

	/* sync and fadvise to discard the page cache */
	fsync(fd);
	if (posix_fadvise(fd, 0, expected, POSIX_FADV_DONTNEED) == -1) {
		perror("posix_fadvise");
		exit(EXIT_FAILURE);
	}

	/* map the file and use mincore to see which parts of it are resident */
	buf = mmap(NULL, expected, PROT_READ, MAP_SHARED, fd, 0);
	if (buf == NULL) {
		perror("mmap");
		exit(EXIT_FAILURE);
	}
	if (mincore(buf, expected, vec) == -1) {
		perror("mincore");
		exit(EXIT_FAILURE);
	}

	/* Check residency */
	for (i = 0, resident = 0; i < FILESIZE_PAGES; i++) {
		if (vec[i])
			resident++;
	}
	if (resident != 0) {
		printf("Nr unexpected pages resident: %d\n", resident);
		exit(EXIT_FAILURE);
	}

	munmap(buf, expected);
	close(fd);
	free(vec);
	exit(EXIT_SUCCESS);
}

Signed-off-by: Mel Gorman <mgorman@suse.de>
Reported-by: Rob van der Heij <rvdheij@gmail.com>
Tested-by: Rob van der Heij <rvdheij@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 mm/fadvise.c | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/mm/fadvise.c b/mm/fadvise.c
index 469491e0..dcb9872 100644
--- a/mm/fadvise.c
+++ b/mm/fadvise.c
@@ -17,6 +17,7 @@
 #include <linux/fadvise.h>
 #include <linux/writeback.h>
 #include <linux/syscalls.h>
+#include <linux/swap.h>
 
 #include <asm/unistd.h>
 
@@ -124,9 +125,22 @@ SYSCALL_DEFINE(fadvise64_64)(int fd, loff_t offset, loff_t len, int advice)
 		start_index = (offset+(PAGE_CACHE_SIZE-1)) >> PAGE_CACHE_SHIFT;
 		end_index = (endbyte >> PAGE_CACHE_SHIFT);
 
-		if (end_index >= start_index)
-			invalidate_mapping_pages(mapping, start_index,
+		if (end_index >= start_index) {
+			unsigned long count = invalidate_mapping_pages(mapping,
+						start_index, end_index);
+
+			/*
+			 * If fewer pages were invalidated than expected then
+			 * it is possible that some of the pages were on
+			 * a per-cpu pagevec for a remote CPU. Drain all
+			 * pagevecs and try again.
+			 */
+			if (count < (end_index - start_index + 1)) {
+				lru_add_drain_all();
+				invalidate_mapping_pages(mapping, start_index,
 						end_index);
+			}
+		}
 		break;
 	default:
 		ret = -EINVAL;
-- 
1.8.1.2

[PATCH 080/139] tmpfs: fix use-after-free of mempolicy object

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Greg Thelen <gthelen@google.com>

commit 5f00110f7273f9ff04ac69a5f85bb535a4fd0987 upstream.

The tmpfs remount logic preserves filesystem mempolicy if the mpol=M
option is not specified in the remount request.  A new policy can be
specified if mpol=M is given.

Before this patch remounting an mpol bound tmpfs without specifying
mpol= mount option in the remount request would set the filesystem's
mempolicy object to a freed mempolicy object.

To reproduce the problem boot a DEBUG_PAGEALLOC kernel and run:
    # mkdir /tmp/x

    # mount -t tmpfs -o size=100M,mpol=interleave nodev /tmp/x

    # grep /tmp/x /proc/mounts
    nodev /tmp/x tmpfs rw,relatime,size=102400k,mpol=interleave:0-3 0 0

    # mount -o remount,size=200M nodev /tmp/x

    # grep /tmp/x /proc/mounts
    nodev /tmp/x tmpfs rw,relatime,size=204800k,mpol=??? 0 0
        # note ? garbage in mpol=... output above

    # dd if=/dev/zero of=/tmp/x/f count=1
        # panic here

Panic:
    BUG: unable to handle kernel NULL pointer dereference at           (null)
    IP: [<          (null)>]           (null)
    [...]
    Oops: 0010 [#1] SMP DEBUG_PAGEALLOC
    Call Trace:
      mpol_shared_policy_init+0xa5/0x160
      shmem_get_inode+0x209/0x270
      shmem_mknod+0x3e/0xf0
      shmem_create+0x18/0x20
      vfs_create+0xb5/0x130
      do_last+0x9a1/0xea0
      path_openat+0xb3/0x4d0
      do_filp_open+0x42/0xa0
      do_sys_open+0xfe/0x1e0
      compat_sys_open+0x1b/0x20
      cstar_dispatch+0x7/0x1f

Non-debug kernels will not crash immediately because referencing the
dangling mpol will not cause a fault.  Instead the filesystem will
reference a freed mempolicy object, which will cause unpredictable
behavior.

The problem boils down to a dropped mpol reference below if
shmem_parse_options() does not allocate a new mpol:

    config = *sbinfo
    shmem_parse_options(data, &config, true)
    mpol_put(sbinfo->mpol)
    sbinfo->mpol = config.mpol  /* BUG: saves unreferenced mpol */

This patch avoids the crash by not releasing the mempolicy if
shmem_parse_options() doesn't create a new mpol.

How far back does this issue go? I see it in both 2.6.36 and 3.3.  I did
not look back further.

Signed-off-by: Greg Thelen <gthelen@google.com>
Acked-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 mm/shmem.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/mm/shmem.c b/mm/shmem.c
index 626a7e7..2cede41 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -2541,6 +2541,7 @@ static int shmem_remount_fs(struct super_block *sb, int *flags, char *data)
 	unsigned long inodes;
 	int error = -EINVAL;
 
+	config.mpol = NULL;
 	if (shmem_parse_options(data, &config, true))
 		return error;
 
@@ -2565,8 +2566,13 @@ static int shmem_remount_fs(struct super_block *sb, int *flags, char *data)
 	sbinfo->max_inodes  = config.max_inodes;
 	sbinfo->free_inodes = config.max_inodes - inodes;
 
-	mpol_put(sbinfo->mpol);
-	sbinfo->mpol        = config.mpol;	/* transfers initial ref */
+	/*
+	 * Preserve previous mempolicy unless mpol remount option was specified.
+	 */
+	if (config.mpol) {
+		mpol_put(sbinfo->mpol);
+		sbinfo->mpol = config.mpol;	/* transfers initial ref */
+	}
 out:
 	spin_unlock(&sbinfo->stat_lock);
 	return error;
-- 
1.8.1.2

[PATCH 081/139] dca: check against empty dca_domains list before unregister provider

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Maciej Sosnowski <maciej.sosnowski@intel.com>

commit c419fcfd071cf34ba00f9f65282583772d2655e7 upstream.

When providers get blocked unregister_dca_providers() is called ending up
with dca_providers and dca_domain lists emptied. Dca should be prevented from
trying to unregister any provider if dca_domain list is found empty.

Reported-by: Jiang Liu <jiang.liu@huawei.com>
Tested-by: Gaohuai Han <hangaohuai@huawei.com>
Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Dan Williams <djbw@fb.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/dca/dca-core.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/dca/dca-core.c b/drivers/dca/dca-core.c
index bc6f5fa..819dfda 100644
--- a/drivers/dca/dca-core.c
+++ b/drivers/dca/dca-core.c
@@ -420,6 +420,11 @@ void unregister_dca_provider(struct dca_provider *dca, struct device *dev)
 
 	raw_spin_lock_irqsave(&dca_lock, flags);
 
+	if (list_empty(&dca_domains)) {
+		raw_spin_unlock_irqrestore(&dca_lock, flags);
+		return;
+	}
+
 	list_del(&dca->node);
 
 	pci_rc = dca_pci_rc_from_dev(dev);
-- 
1.8.1.2

[PATCH 082/139] ext4: return ENOMEM if sb_getblk() fails

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Theodore Ts'o <tytso@mit.edu>

commit 860d21e2c585f7ee8a4ecc06f474fdc33c9474f4 upstream.

The only reason for sb_getblk() failing is if it can't allocate the
buffer_head.  So ENOMEM is more appropriate than EIO.  In addition,
make sure that the file system is marked as being inconsistent if
sb_getblk() fails.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
[ luis: removed fs/ext4/inline.c ]
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 fs/ext4/extents.c  | 25 ++++++++++++++-----------
 fs/ext4/indirect.c |  9 ++++++---
 fs/ext4/inode.c    |  9 +++------
 fs/ext4/mmp.c      |  2 ++
 fs/ext4/resize.c   |  8 ++++----
 fs/ext4/xattr.c    |  3 ++-
 6 files changed, 31 insertions(+), 25 deletions(-)

diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 8e5dd3b..d14487e 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -720,6 +720,7 @@ ext4_ext_find_extent(struct inode *inode, ext4_lblk_t block,
 	struct ext4_extent_header *eh;
 	struct buffer_head *bh;
 	short int depth, i, ppos = 0, alloc = 0;
+	int ret;
 
 	eh = ext_inode_hdr(inode);
 	depth = ext_depth(inode);
@@ -747,12 +748,15 @@ ext4_ext_find_extent(struct inode *inode, ext4_lblk_t block,
 		path[ppos].p_ext = NULL;
 
 		bh = sb_getblk(inode->i_sb, path[ppos].p_block);
-		if (unlikely(!bh))
+		if (unlikely(!bh)) {
+			ret = -ENOMEM;
 			goto err;
+		}
 		if (!bh_uptodate_or_lock(bh)) {
 			trace_ext4_ext_load_extent(inode, block,
 						path[ppos].p_block);
-			if (bh_submit_read(bh) < 0) {
+			ret = bh_submit_read(bh);
+			if (ret < 0) {
 				put_bh(bh);
 				goto err;
 			}
@@ -763,13 +767,15 @@ ext4_ext_find_extent(struct inode *inode, ext4_lblk_t block,
 			put_bh(bh);
 			EXT4_ERROR_INODE(inode,
 					 "ppos %d > depth %d", ppos, depth);
+			ret = -EIO;
 			goto err;
 		}
 		path[ppos].p_bh = bh;
 		path[ppos].p_hdr = eh;
 		i--;
 
-		if (ext4_ext_check_block(inode, eh, i, bh))
+		ret = ext4_ext_check_block(inode, eh, i, bh);
+		if (ret < 0)
 			goto err;
 	}
 
@@ -791,7 +797,7 @@ err:
 	ext4_ext_drop_refs(path);
 	if (alloc)
 		kfree(path);
-	return ERR_PTR(-EIO);
+	return ERR_PTR(ret);
 }
 
 /*
@@ -946,7 +952,7 @@ static int ext4_ext_split(handle_t *handle, struct inode *inode,
 	}
 	bh = sb_getblk(inode->i_sb, newblock);
 	if (!bh) {
-		err = -EIO;
+		err = -ENOMEM;
 		goto cleanup;
 	}
 	lock_buffer(bh);
@@ -1019,7 +1025,7 @@ static int ext4_ext_split(handle_t *handle, struct inode *inode,
 		newblock = ablocks[--a];
 		bh = sb_getblk(inode->i_sb, newblock);
 		if (!bh) {
-			err = -EIO;
+			err = -ENOMEM;
 			goto cleanup;
 		}
 		lock_buffer(bh);
@@ -1131,11 +1137,8 @@ static int ext4_ext_grow_indepth(handle_t *handle, struct inode *inode,
 		return err;
 
 	bh = sb_getblk(inode->i_sb, newblock);
-	if (!bh) {
-		err = -EIO;
-		ext4_std_error(inode->i_sb, err);
-		return err;
-	}
+	if (!bh)
+		return -ENOMEM;
 	lock_buffer(bh);
 
 	err = ext4_journal_get_create_access(handle, bh);
diff --git a/fs/ext4/indirect.c b/fs/ext4/indirect.c
index 830e1b2..6dc6153 100644
--- a/fs/ext4/indirect.c
+++ b/fs/ext4/indirect.c
@@ -145,6 +145,7 @@ static Indirect *ext4_get_branch(struct inode *inode, int depth,
 	struct super_block *sb = inode->i_sb;
 	Indirect *p = chain;
 	struct buffer_head *bh;
+	int ret = -EIO;
 
 	*err = 0;
 	/* i_data is not going away, no lock needed */
@@ -153,8 +154,10 @@ static Indirect *ext4_get_branch(struct inode *inode, int depth,
 		goto no_block;
 	while (--depth) {
 		bh = sb_getblk(sb, le32_to_cpu(p->key));
-		if (unlikely(!bh))
+		if (unlikely(!bh)) {
+			ret = -ENOMEM;
 			goto failure;
+		}
 
 		if (!bh_uptodate_or_lock(bh)) {
 			if (bh_submit_read(bh) < 0) {
@@ -176,7 +179,7 @@ static Indirect *ext4_get_branch(struct inode *inode, int depth,
 	return NULL;
 
 failure:
-	*err = -EIO;
+	*err = ret;
 no_block:
 	return p;
 }
@@ -470,7 +473,7 @@ static int ext4_alloc_branch(handle_t *handle, struct inode *inode,
 		 */
 		bh = sb_getblk(inode->i_sb, new_blocks[n-1]);
 		if (unlikely(!bh)) {
-			err = -EIO;
+			err = -ENOMEM;
 			goto failed;
 		}
 
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 75f537f..20b2687 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -730,7 +730,7 @@ struct buffer_head *ext4_getblk(handle_t *handle, struct inode *inode,
 
 	bh = sb_getblk(inode->i_sb, map.m_pblk);
 	if (!bh) {
-		*errp = -EIO;
+		*errp = -ENOMEM;
 		return NULL;
 	}
 	if (map.m_flags & EXT4_MAP_NEW) {
@@ -3528,11 +3528,8 @@ static int __ext4_get_inode_loc(struct inode *inode,
 	iloc->offset = (inode_offset % inodes_per_block) * EXT4_INODE_SIZE(sb);
 
 	bh = sb_getblk(sb, block);
-	if (!bh) {
-		EXT4_ERROR_INODE_BLOCK(inode, block,
-				       "unable to read itable block");
-		return -EIO;
-	}
+	if (!bh)
+		return -ENOMEM;
 	if (!buffer_uptodate(bh)) {
 		lock_buffer(bh);
 
diff --git a/fs/ext4/mmp.c b/fs/ext4/mmp.c
index f99a131..b4d5088 100644
--- a/fs/ext4/mmp.c
+++ b/fs/ext4/mmp.c
@@ -74,6 +74,8 @@ static int read_mmp_block(struct super_block *sb, struct buffer_head **bh,
 	 * is not blocked in the elevator. */
 	if (!*bh)
 		*bh = sb_getblk(sb, mmp_block);
+	if (!*bh)
+		return -ENOMEM;
 	if (*bh) {
 		get_bh(*bh);
 		lock_buffer(*bh);
diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c
index 367510e..4c31b71 100644
--- a/fs/ext4/resize.c
+++ b/fs/ext4/resize.c
@@ -315,7 +315,7 @@ static struct buffer_head *bclean(handle_t *handle, struct super_block *sb,
 
 	bh = sb_getblk(sb, blk);
 	if (!bh)
-		return ERR_PTR(-EIO);
+		return ERR_PTR(-ENOMEM);
 	if ((err = ext4_journal_get_write_access(handle, bh))) {
 		brelse(bh);
 		bh = ERR_PTR(err);
@@ -392,7 +392,7 @@ static int set_flexbg_block_bitmap(struct super_block *sb, handle_t *handle,
 
 		bh = sb_getblk(sb, flex_gd->groups[group].block_bitmap);
 		if (!bh)
-			return -EIO;
+			return -ENOMEM;
 
 		err = ext4_journal_get_write_access(handle, bh);
 		if (err)
@@ -470,7 +470,7 @@ static int setup_new_flex_group_blocks(struct super_block *sb,
 
 			gdb = sb_getblk(sb, block);
 			if (!gdb) {
-				err = -EIO;
+				err = -ENOMEM;
 				goto out;
 			}
 
@@ -991,7 +991,7 @@ static void update_backups(struct super_block *sb,
 
 		bh = sb_getblk(sb, group * bpg + blk_off);
 		if (!bh) {
-			err = -EIO;
+			err = -ENOMEM;
 			break;
 		}
 		ext4_debug("update metadata backup %#04lx\n",
diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
index 2cdb98d..3390680 100644
--- a/fs/ext4/xattr.c
+++ b/fs/ext4/xattr.c
@@ -898,16 +898,17 @@ inserted:
 
 			new_bh = sb_getblk(sb, block);
 			if (!new_bh) {
+				error = -ENOMEM;
 getblk_failed:
 				ext4_free_blocks(handle, inode, NULL, block, 1,
 						 EXT4_FREE_BLOCKS_METADATA);
-				error = -EIO;
 				goto cleanup;
 			}
 			lock_buffer(new_bh);
 			error = ext4_journal_get_create_access(handle, new_bh);
 			if (error) {
 				unlock_buffer(new_bh);
+				error = -EIO;
 				goto getblk_failed;
 			}
 			memcpy(new_bh->b_data, s->base, new_bh->b_size);
-- 
1.8.1.2

[PATCH 083/139] ext4: check bh in ext4_read_block_bitmap()

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Eryu Guan <guaneryu@gmail.com>

commit 15b49132fc972c63894592f218ea5a9a61b1a18f upstream.

Validate the bh pointer before using it, since
ext4_read_block_bitmap_nowait() might return NULL.

I've seen this in fsfuzz testing.

 EXT4-fs error (device loop0): ext4_read_block_bitmap_nowait:385: comm touch: Cannot get buffer for block bitmap - block_group = 0, block_bitmap = 3925999616
 BUG: unable to handle kernel NULL pointer dereference at           (null)
 IP: [<ffffffff8121de25>] ext4_wait_block_bitmap+0x25/0xe0
 ...
 Call Trace:
  [<ffffffff8121e1e5>] ext4_read_block_bitmap+0x35/0x60
  [<ffffffff8125e9c6>] ext4_free_blocks+0x236/0xb80
  [<ffffffff811d0d36>] ? __getblk+0x36/0x70
  [<ffffffff811d0a5f>] ? __find_get_block+0x8f/0x210
  [<ffffffff81191ef3>] ? kmem_cache_free+0x33/0x140
  [<ffffffff812678e5>] ext4_xattr_release_block+0x1b5/0x1d0
  [<ffffffff812679be>] ext4_xattr_delete_inode+0xbe/0x100
  [<ffffffff81222a7c>] ext4_free_inode+0x7c/0x4d0
  [<ffffffff812277b8>] ? ext4_mark_inode_dirty+0x88/0x230
  [<ffffffff8122993c>] ext4_evict_inode+0x32c/0x490
  [<ffffffff811b8cd7>] evict+0xa7/0x1c0
  [<ffffffff811b8ed3>] iput_final+0xe3/0x170
  [<ffffffff811b8f9e>] iput+0x3e/0x50
  [<ffffffff812316fd>] ext4_add_nondir+0x4d/0x90
  [<ffffffff81231d0b>] ext4_create+0xeb/0x170
  [<ffffffff811aae9c>] vfs_create+0xac/0xd0
  [<ffffffff811ac845>] lookup_open+0x185/0x1c0
  [<ffffffff8129e3b9>] ? selinux_inode_permission+0xa9/0x170
  [<ffffffff811acb54>] do_last+0x2d4/0x7a0
  [<ffffffff811af743>] path_openat+0xb3/0x480
  [<ffffffff8116a8a1>] ? handle_mm_fault+0x251/0x3b0
  [<ffffffff811afc49>] do_filp_open+0x49/0xa0
  [<ffffffff811bbaad>] ? __alloc_fd+0xdd/0x150
  [<ffffffff8119da28>] do_sys_open+0x108/0x1f0
  [<ffffffff8119db51>] sys_open+0x21/0x30
  [<ffffffff81618959>] system_call_fastpath+0x16/0x1b

Also fix comment for ext4_read_block_bitmap_nowait()

Signed-off-by: Eryu Guan <guaneryu@gmail.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 fs/ext4/balloc.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index cf18217..33938c1 100644
--- a/fs/ext4/balloc.c
+++ b/fs/ext4/balloc.c
@@ -358,7 +358,7 @@ void ext4_validate_block_bitmap(struct super_block *sb,
 }
 
 /**
- * ext4_read_block_bitmap()
+ * ext4_read_block_bitmap_nowait()
  * @sb:			super block
  * @block_group:	given block group
  *
@@ -457,6 +457,8 @@ ext4_read_block_bitmap(struct super_block *sb, ext4_group_t block_group)
 	struct buffer_head *bh;
 
 	bh = ext4_read_block_bitmap_nowait(sb, block_group);
+	if (!bh)
+		return NULL;
 	if (ext4_wait_block_bitmap(sb, block_group, bh)) {
 		put_bh(bh);
 		return NULL;
-- 
1.8.1.2

[PATCH 084/139] quota: autoload the quota_v2 module for QFMT_VFS_V1 quota format

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Theodore Ts'o <tytso@mit.edu>

commit c3ad83d9efdfe6a86efd44945a781f00c879b7b4 upstream.

Otherwise, ext4 file systems with the quota featured enable will get a
very confusing "No such process" error message if the quota code is
built as a module and the quota_v2 module has not been loaded.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>
Acked-by: Jan Kara <jack@suse.cz>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 include/linux/quota.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/linux/quota.h b/include/linux/quota.h
index c09fa04..ffd8607 100644
--- a/include/linux/quota.h
+++ b/include/linux/quota.h
@@ -417,6 +417,7 @@ struct quota_module_name {
 #define INIT_QUOTA_MODULE_NAMES {\
 	{QFMT_VFS_OLD, "quota_v1"},\
 	{QFMT_VFS_V0, "quota_v2"},\
+	{QFMT_VFS_V1, "quota_v2"},\
 	{0, NULL}}
 
 #endif /* __KERNEL__ */
-- 
1.8.1.2

[PATCH 085/139] ext4: fix possible use-after-free with AIO

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jan Kara <jack@suse.cz>

commit 091e26dfc156aeb3b73bc5c5f277e433ad39331c upstream.

Running AIO is pinning inode in memory using file reference. Once AIO
is completed using aio_complete(), file reference is put and inode can
be freed from memory. So we have to be sure that calling aio_complete()
is the last thing we do with the inode.

Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>
Acked-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
[ luis: adjust context ]
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 fs/ext4/inode.c   |  2 +-
 fs/ext4/page-io.c | 10 ++++------
 2 files changed, 5 insertions(+), 7 deletions(-)

diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 20b2687..0589bb2 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -2867,9 +2867,9 @@ static void ext4_end_io_dio(struct kiocb *iocb, loff_t offset,
 	if (!(io_end->flag & EXT4_IO_END_UNWRITTEN)) {
 		ext4_free_io_end(io_end);
 out:
+		inode_dio_done(inode);
 		if (is_async)
 			aio_complete(iocb, ret, 0);
-		inode_dio_done(inode);
 		return;
 	}
 
diff --git a/fs/ext4/page-io.c b/fs/ext4/page-io.c
index dcdeef1..7e04138 100644
--- a/fs/ext4/page-io.c
+++ b/fs/ext4/page-io.c
@@ -106,15 +106,13 @@ int ext4_end_io_nolock(ext4_io_end_t *io)
 			 "(inode %lu, offset %llu, size %zd, error %d)",
 			 inode->i_ino, offset, size, ret);
 	}
-
-	if (io->iocb)
-		aio_complete(io->iocb, io->result, 0);
-
-	if (io->flag & EXT4_IO_END_DIRECT)
-		inode_dio_done(inode);
 	/* Wake up anyone waiting on unwritten extent conversion */
 	if (atomic_dec_and_test(&EXT4_I(inode)->i_aiodio_unwritten))
 		wake_up_all(ext4_ioend_wq(io->inode));
+	if (io->flag & EXT4_IO_END_DIRECT)
+		inode_dio_done(inode);
+	if (io->iocb)
+		aio_complete(io->iocb, io->result, 0);
 	return ret;
 }
 
-- 
1.8.1.2

[PATCH 086/139] drm/i915: Fix CAGF for HSW

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Ben Widawsky <ben@bwidawsk.net>

commit f82855d342b6c8483c56e6d2e200a71731509a39 upstream.

The shift changed, hurray.

Reported-by: Kenneth Graunke <kenneth@whitecape.org>
Cc: Paulo Zanoni <przanoni@gmail.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Tested-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
[ luis: removed reference to GT_FREQUENCY_MULTIPLIER, replacing it by 50 ]
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/gpu/drm/i915/i915_debugfs.c | 10 +++++++---
 drivers/gpu/drm/i915/i915_reg.h     |  2 ++
 2 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index ca472ca..3459e27 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -894,7 +894,7 @@ static int i915_cur_delayinfo(struct seq_file *m, void *unused)
 		u32 gt_perf_status = I915_READ(GEN6_GT_PERF_STATUS);
 		u32 rp_state_limits = I915_READ(GEN6_RP_STATE_LIMITS);
 		u32 rp_state_cap = I915_READ(GEN6_RP_STATE_CAP);
-		u32 rpstat;
+		u32 rpstat, cagf;
 		u32 rpupei, rpcurup, rpprevup;
 		u32 rpdownei, rpcurdown, rpprevdown;
 		int max_freq;
@@ -913,6 +913,11 @@ static int i915_cur_delayinfo(struct seq_file *m, void *unused)
 		rpdownei = I915_READ(GEN6_RP_CUR_DOWN_EI);
 		rpcurdown = I915_READ(GEN6_RP_CUR_DOWN);
 		rpprevdown = I915_READ(GEN6_RP_PREV_DOWN);
+		if (IS_HASWELL(dev))
+			cagf = (rpstat & HSW_CAGF_MASK) >> HSW_CAGF_SHIFT;
+		else
+			cagf = (rpstat & GEN6_CAGF_MASK) >> GEN6_CAGF_SHIFT;
+		cagf *= 50;
 
 		gen6_gt_force_wake_put(dev_priv);
 		mutex_unlock(&dev->struct_mutex);
@@ -925,8 +930,7 @@ static int i915_cur_delayinfo(struct seq_file *m, void *unused)
 			   gt_perf_status & 0xff);
 		seq_printf(m, "Render p-state limit: %d\n",
 			   rp_state_limits & 0xff);
-		seq_printf(m, "CAGF: %dMHz\n", ((rpstat & GEN6_CAGF_MASK) >>
-						GEN6_CAGF_SHIFT) * 50);
+		seq_printf(m, "CAGF: %dMHz\n", cagf);
 		seq_printf(m, "RP CUR UP EI: %dus\n", rpupei &
 			   GEN6_CURICONT_MASK);
 		seq_printf(m, "RP CUR UP: %dus\n", rpcurup &
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 44feabe..26b8bba 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -4045,7 +4045,9 @@
 #define GEN6_RP_INTERRUPT_LIMITS		0xA014
 #define GEN6_RPSTAT1				0xA01C
 #define   GEN6_CAGF_SHIFT			8
+#define   HSW_CAGF_SHIFT			7
 #define   GEN6_CAGF_MASK			(0x7f << GEN6_CAGF_SHIFT)
+#define   HSW_CAGF_MASK				(0x7f << HSW_CAGF_SHIFT)
 #define GEN6_RP_CONTROL				0xA024
 #define   GEN6_RP_MEDIA_TURBO			(1<<11)
 #define   GEN6_RP_MEDIA_MODE_MASK		(3<<9)
-- 
1.8.1.2

[PATCH 087/139] ext4: fix race in ext4_mb_add_n_trim()

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Niu Yawei <yawei.niu@gmail.com>

commit f1167009711032b0d747ec89a632a626c901a1ad upstream.

In ext4_mb_add_n_trim(), lg_prealloc_lock should be taken when
changing the lg_prealloc_list.

Signed-off-by: Niu Yawei <yawei.niu@intel.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 fs/ext4/mballoc.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index af848bb..b5f8b5f 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -4123,7 +4123,7 @@ static void ext4_mb_add_n_trim(struct ext4_allocation_context *ac)
 		/* The max size of hash table is PREALLOC_TB_SIZE */
 		order = PREALLOC_TB_SIZE - 1;
 	/* Add the prealloc space to lg */
-	rcu_read_lock();
+	spin_lock(&lg->lg_prealloc_lock);
 	list_for_each_entry_rcu(tmp_pa, &lg->lg_prealloc_list[order],
 						pa_inode_list) {
 		spin_lock(&tmp_pa->pa_lock);
@@ -4147,12 +4147,12 @@ static void ext4_mb_add_n_trim(struct ext4_allocation_context *ac)
 	if (!added)
 		list_add_tail_rcu(&pa->pa_inode_list,
 					&lg->lg_prealloc_list[order]);
-	rcu_read_unlock();
+	spin_unlock(&lg->lg_prealloc_lock);
 
 	/* Now trim the list to be not more than 8 elements */
 	if (lg_prealloc_count > 8) {
 		ext4_mb_discard_lg_preallocations(sb, lg,
-						order, lg_prealloc_count);
+						  order, lg_prealloc_count);
 		return;
 	}
 	return ;
-- 
1.8.1.2

[PATCH 088/139] UBIFS: fix use of freed ubifs_orphan objects

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Adam Thomas <adamthomas1111@gmail.com>

commit 2928f0d0c5ebd6c9605c0d98207a44376387c298 upstream.

The last orphan in the cnext list has its cnext set to NULL. Because
of that, ubifs_delete_orphan assumes that it is not on the cnext list
and frees it immediately instead of adding it to the dnext list. The
freed orphan is later modified by write_orph_node.

This can cause various inconsistencies including directory entries
that cannot be removed and this error:

UBIFS error (pid 20685): layout_cnodes: LPT out of space at LEB 14:129009 needing 17, done_ltab 1, done_lsave 1

This is a regression introduced by
"7074e5eb UBIFS: remove invalid reference to list iterator variable".

This change adds an explicit flag to ubifs_orphan indicating whether
it is pending commit.

Signed-off-by: Adam Thomas <adamthomas1111@gmail.com>
Reviewed-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 fs/ubifs/orphan.c | 7 ++++++-
 fs/ubifs/ubifs.h  | 4 +++-
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/fs/ubifs/orphan.c b/fs/ubifs/orphan.c
index b02734d..bd516f1 100644
--- a/fs/ubifs/orphan.c
+++ b/fs/ubifs/orphan.c
@@ -132,7 +132,7 @@ void ubifs_delete_orphan(struct ubifs_info *c, ino_t inum)
 					(unsigned long)inum);
 				return;
 			}
-			if (o->cnext) {
+			if (o->cmt) {
 				o->dnext = c->orph_dnext;
 				c->orph_dnext = o;
 				spin_unlock(&c->orphan_lock);
@@ -172,7 +172,9 @@ int ubifs_orphan_start_commit(struct ubifs_info *c)
 	last = &c->orph_cnext;
 	list_for_each_entry(orphan, &c->orph_new, new_list) {
 		ubifs_assert(orphan->new);
+		ubifs_assert(!orphan->cmt);
 		orphan->new = 0;
+		orphan->cmt = 1;
 		*last = orphan;
 		last = &orphan->cnext;
 	}
@@ -299,7 +301,9 @@ static int write_orph_node(struct ubifs_info *c, int atomic)
 	cnext = c->orph_cnext;
 	for (i = 0; i < cnt; i++) {
 		orphan = cnext;
+		ubifs_assert(orphan->cmt);
 		orph->inos[i] = cpu_to_le64(orphan->inum);
+		orphan->cmt = 0;
 		cnext = orphan->cnext;
 		orphan->cnext = NULL;
 	}
@@ -378,6 +382,7 @@ static int consolidate(struct ubifs_info *c)
 		list_for_each_entry(orphan, &c->orph_list, list) {
 			if (orphan->new)
 				continue;
+			orphan->cmt = 1;
 			*last = orphan;
 			last = &orphan->cnext;
 			cnt += 1;
diff --git a/fs/ubifs/ubifs.h b/fs/ubifs/ubifs.h
index 51ac3e6..fb89c54 100644
--- a/fs/ubifs/ubifs.h
+++ b/fs/ubifs/ubifs.h
@@ -905,6 +905,7 @@ struct ubifs_budget_req {
  * @dnext: next orphan to delete
  * @inum: inode number
  * @new: %1 => added since the last commit, otherwise %0
+ * @cmt: %1 => commit pending, otherwise %0
  */
 struct ubifs_orphan {
 	struct rb_node rb;
@@ -913,7 +914,8 @@ struct ubifs_orphan {
 	struct ubifs_orphan *cnext;
 	struct ubifs_orphan *dnext;
 	ino_t inum;
-	int new;
+	unsigned new:1;
+	unsigned cmt:1;
 };
 
 /**
-- 
1.8.1.2

[PATCH 089/139] UBIFS: fix double free of ubifs_orphan objects

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Adam Thomas <adamthomas1111@gmail.com>

commit 8afd500cb52a5d00bab4525dd5a560d199f979b9 upstream.

The last orphan in the dnext list has its dnext set to NULL. Because
of that, ubifs_delete_orphan assumes that it is not on the dnext list
and frees it immediately instead ignoring it as a second delete. The
orphan is later freed again by erase_deleted.

This change adds an explicit flag to ubifs_orphan indicating whether
it is pending delete.

Signed-off-by: Adam Thomas <adamthomas1111@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 fs/ubifs/orphan.c | 5 ++++-
 fs/ubifs/ubifs.h  | 2 ++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/fs/ubifs/orphan.c b/fs/ubifs/orphan.c
index bd516f1..9ef951f3 100644
--- a/fs/ubifs/orphan.c
+++ b/fs/ubifs/orphan.c
@@ -126,13 +126,14 @@ void ubifs_delete_orphan(struct ubifs_info *c, ino_t inum)
 		else if (inum > o->inum)
 			p = p->rb_right;
 		else {
-			if (o->dnext) {
+			if (o->del) {
 				spin_unlock(&c->orphan_lock);
 				dbg_gen("deleted twice ino %lu",
 					(unsigned long)inum);
 				return;
 			}
 			if (o->cmt) {
+				o->del = 1;
 				o->dnext = c->orph_dnext;
 				c->orph_dnext = o;
 				spin_unlock(&c->orphan_lock);
@@ -447,6 +448,7 @@ static void erase_deleted(struct ubifs_info *c)
 		orphan = dnext;
 		dnext = orphan->dnext;
 		ubifs_assert(!orphan->new);
+		ubifs_assert(orphan->del);
 		rb_erase(&orphan->rb, &c->orph_tree);
 		list_del(&orphan->list);
 		c->tot_orphans -= 1;
@@ -536,6 +538,7 @@ static int insert_dead_orphan(struct ubifs_info *c, ino_t inum)
 	rb_link_node(&orphan->rb, parent, p);
 	rb_insert_color(&orphan->rb, &c->orph_tree);
 	list_add_tail(&orphan->list, &c->orph_list);
+	orphan->del = 1;
 	orphan->dnext = c->orph_dnext;
 	c->orph_dnext = orphan;
 	dbg_mnt("ino %lu, new %d, tot %d", (unsigned long)inum,
diff --git a/fs/ubifs/ubifs.h b/fs/ubifs/ubifs.h
index fb89c54..f15c6e7 100644
--- a/fs/ubifs/ubifs.h
+++ b/fs/ubifs/ubifs.h
@@ -906,6 +906,7 @@ struct ubifs_budget_req {
  * @inum: inode number
  * @new: %1 => added since the last commit, otherwise %0
  * @cmt: %1 => commit pending, otherwise %0
+ * @del: %1 => delete pending, otherwise %0
  */
 struct ubifs_orphan {
 	struct rb_node rb;
@@ -916,6 +917,7 @@ struct ubifs_orphan {
 	ino_t inum;
 	unsigned new:1;
 	unsigned cmt:1;
+	unsigned del:1;
 };
 
 /**
-- 
1.8.1.2

[PATCH 090/139] drm/radeon/dce6: fix display powergating

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Alex Deucher <alexander.deucher@amd.com>

commit 0e3d50bfcbd338254795a700dcff429a96cba1a6 upstream.

Only enable it when we disable the display rather than
at DPMS time since enabling it requires a full modeset
to restore the display state.  Fixes blank screens in
certain cases.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/gpu/drm/radeon/atombios_crtc.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c b/drivers/gpu/drm/radeon/atombios_crtc.c
index 80eb8d5..08b71a3 100644
--- a/drivers/gpu/drm/radeon/atombios_crtc.c
+++ b/drivers/gpu/drm/radeon/atombios_crtc.c
@@ -258,8 +258,6 @@ void atombios_crtc_dpms(struct drm_crtc *crtc, int mode)
 		radeon_crtc->enabled = true;
 		/* adjust pm to dpms changes BEFORE enabling crtcs */
 		radeon_pm_compute_clocks(rdev);
-		if (ASIC_IS_DCE6(rdev) && !radeon_crtc->in_mode_set)
-			atombios_powergate_crtc(crtc, ATOM_DISABLE);
 		atombios_enable_crtc(crtc, ATOM_ENABLE);
 		if (ASIC_IS_DCE3(rdev) && !ASIC_IS_DCE6(rdev))
 			atombios_enable_crtc_memreq(crtc, ATOM_ENABLE);
@@ -277,8 +275,6 @@ void atombios_crtc_dpms(struct drm_crtc *crtc, int mode)
 			atombios_enable_crtc_memreq(crtc, ATOM_DISABLE);
 		atombios_enable_crtc(crtc, ATOM_DISABLE);
 		radeon_crtc->enabled = false;
-		if (ASIC_IS_DCE6(rdev) && !radeon_crtc->in_mode_set)
-			atombios_powergate_crtc(crtc, ATOM_ENABLE);
 		/* adjust pm to dpms changes AFTER disabling crtcs */
 		radeon_pm_compute_clocks(rdev);
 		break;
@@ -1673,6 +1669,8 @@ static void atombios_crtc_disable(struct drm_crtc *crtc)
 	int i;
 
 	atombios_crtc_dpms(crtc, DRM_MODE_DPMS_OFF);
+	if (ASIC_IS_DCE6(rdev))
+		atombios_powergate_crtc(crtc, ATOM_ENABLE);
 
 	for (i = 0; i < rdev->num_crtc; i++) {
 		if (rdev->mode_info.crtcs[i] &&
-- 
1.8.1.2

[PATCH 091/139] vgacon/vt: clear buffer attributes when we load a 512 character font (v2)

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Dave Airlie <airlied@redhat.com>

commit 2a2483072393b27f4336ab068a1f48ca19ff1c1e upstream.

When we switch from 256->512 byte font rendering mode, it means the
current contents of the screen is being reinterpreted. The bit that holds
the high bit of the 9-bit font, may have been previously set, and thus
the new font misrenders.

The problem case we see is grub2 writes spaces with the bit set, so it
ends up with data like 0x820, which gets reinterpreted into 0x120 char
which the font translates into G with a circumflex. This flashes up on
screen at boot and is quite ugly.

A current side effect of this patch though is that any rendering on the
screen changes color to a slightly darker color, but at least the screen
no longer corrupts.

v2: as suggested by hpa, always clear the attribute space, whether we
are are going to or from 512 chars.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/tty/vt/vt.c            |  2 +-
 drivers/video/console/vgacon.c | 22 +++++++++++++++-------
 include/linux/vt_kern.h        |  1 +
 3 files changed, 17 insertions(+), 8 deletions(-)

diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index a13f7e1..3b4f5b6 100644
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -656,7 +656,7 @@ static inline void save_screen(struct vc_data *vc)
  *	Redrawing of screen
  */
 
-static void clear_buffer_attributes(struct vc_data *vc)
+void clear_buffer_attributes(struct vc_data *vc)
 {
 	unsigned short *p = (unsigned short *)vc->vc_origin;
 	int count = vc->vc_screenbuf_size / 2;
diff --git a/drivers/video/console/vgacon.c b/drivers/video/console/vgacon.c
index d449a74..5855d17 100644
--- a/drivers/video/console/vgacon.c
+++ b/drivers/video/console/vgacon.c
@@ -1064,7 +1064,7 @@ static int vgacon_do_font_op(struct vgastate *state,char *arg,int set,int ch512)
 	unsigned short video_port_status = vga_video_port_reg + 6;
 	int font_select = 0x00, beg, i;
 	char *charmap;
-	
+	bool clear_attribs = false;
 	if (vga_video_type != VIDEO_TYPE_EGAM) {
 		charmap = (char *) VGA_MAP_MEM(colourmap, 0);
 		beg = 0x0e;
@@ -1169,12 +1169,6 @@ static int vgacon_do_font_op(struct vgastate *state,char *arg,int set,int ch512)
 
 	/* if 512 char mode is already enabled don't re-enable it. */
 	if ((set) && (ch512 != vga_512_chars)) {
-		/* attribute controller */
-		for (i = 0; i < MAX_NR_CONSOLES; i++) {
-			struct vc_data *c = vc_cons[i].d;
-			if (c && c->vc_sw == &vga_con)
-				c->vc_hi_font_mask = ch512 ? 0x0800 : 0;
-		}
 		vga_512_chars = ch512;
 		/* 256-char: enable intensity bit
 		   512-char: disable intensity bit */
@@ -1185,8 +1179,22 @@ static int vgacon_do_font_op(struct vgastate *state,char *arg,int set,int ch512)
 		   it means, but it works, and it appears necessary */
 		inb_p(video_port_status);
 		vga_wattr(state->vgabase, VGA_AR_ENABLE_DISPLAY, 0);	
+		clear_attribs = true;
 	}
 	raw_spin_unlock_irq(&vga_lock);
+
+	if (clear_attribs) {
+		for (i = 0; i < MAX_NR_CONSOLES; i++) {
+			struct vc_data *c = vc_cons[i].d;
+			if (c && c->vc_sw == &vga_con) {
+				/* force hi font mask to 0, so we always clear
+				   the bit on either transition */
+				c->vc_hi_font_mask = 0x00;
+				clear_buffer_attributes(c);
+				c->vc_hi_font_mask = ch512 ? 0x0800 : 0;
+			}
+		}
+	}
 	return 0;
 }
 
diff --git a/include/linux/vt_kern.h b/include/linux/vt_kern.h
index 50ae7d0..1f55665 100644
--- a/include/linux/vt_kern.h
+++ b/include/linux/vt_kern.h
@@ -47,6 +47,7 @@ int con_set_cmap(unsigned char __user *cmap);
 int con_get_cmap(unsigned char __user *cmap);
 void scrollback(struct vc_data *vc, int lines);
 void scrollfront(struct vc_data *vc, int lines);
+void clear_buffer_attributes(struct vc_data *vc);
 void update_region(struct vc_data *vc, unsigned long start, int count);
 void redraw_screen(struct vc_data *vc, int is_switch);
 #define update_screen(x) redraw_screen(x, 0)
-- 
1.8.1.2

[PATCH 092/139] fbcon: don't lose the console font across generic->chip driver switch

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Dave Airlie <airlied@redhat.com>

commit ae1287865f5361fa138d4d3b1b6277908b54eac9 upstream.

If grub2 loads efifb/vesafb, then when systemd starts it can set the console
font on that framebuffer device, however when we then load the native KMS
driver, the first thing it does is tear down the generic framebuffer driver.

The thing is the generic code is doing the right thing, it frees the font
because otherwise it would leak memory. However we can assume that if you
are removing the generic firmware driver (vesa/efi/offb), that a new driver
*should* be loading soon after, so we effectively leak the font.

However the old code left a dangling pointer in vc->vc_font.data and we
can now reuse that dangling pointer to load the font into the new
driver, now that we aren't freeing it.

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=892340

Cc: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/video/console/fbcon.c | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/drivers/video/console/fbcon.c b/drivers/video/console/fbcon.c
index 88e9204..bdcd34d 100644
--- a/drivers/video/console/fbcon.c
+++ b/drivers/video/console/fbcon.c
@@ -990,7 +990,7 @@ static const char *fbcon_startup(void)
 	}
 
 	/* Setup default font */
-	if (!p->fontdata) {
+	if (!p->fontdata && !vc->vc_font.data) {
 		if (!fontname[0] || !(font = find_font(fontname)))
 			font = get_default_font(info->var.xres,
 						info->var.yres,
@@ -1000,6 +1000,8 @@ static const char *fbcon_startup(void)
 		vc->vc_font.height = font->height;
 		vc->vc_font.data = (void *)(p->fontdata = font->data);
 		vc->vc_font.charcount = 256; /* FIXME  Need to support more fonts */
+	} else {
+		p->fontdata = vc->vc_font.data;
 	}
 
 	cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
@@ -1159,9 +1161,9 @@ static void fbcon_init(struct vc_data *vc, int init)
 	ops->p = &fb_display[fg_console];
 }
 
-static void fbcon_free_font(struct display *p)
+static void fbcon_free_font(struct display *p, bool freefont)
 {
-	if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
+	if (freefont && p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
 		kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
 	p->fontdata = NULL;
 	p->userfont = 0;
@@ -1173,8 +1175,8 @@ static void fbcon_deinit(struct vc_data *vc)
 	struct fb_info *info;
 	struct fbcon_ops *ops;
 	int idx;
+	bool free_font = true;
 
-	fbcon_free_font(p);
 	idx = con2fb_map[vc->vc_num];
 
 	if (idx == -1)
@@ -1185,6 +1187,8 @@ static void fbcon_deinit(struct vc_data *vc)
 	if (!info)
 		goto finished;
 
+	if (info->flags & FBINFO_MISC_FIRMWARE)
+		free_font = false;
 	ops = info->fbcon_par;
 
 	if (!ops)
@@ -1196,6 +1200,8 @@ static void fbcon_deinit(struct vc_data *vc)
 	ops->flags &= ~FBCON_FLAGS_INIT;
 finished:
 
+	fbcon_free_font(p, free_font);
+
 	if (!con_is_bound(&fb_con))
 		fbcon_exit();
 
-- 
1.8.1.2

[PATCH 093/139] drm/usb: bind driver to correct device

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Dave Airlie <airlied@redhat.com>

commit 9f23de52b64f7fb801fd76f3dd8651a0dc89187b upstream.

While looking at plymouth on udl I noticed that plymouth was trying
to use its fb plugin not its drm one, it was trying to drmOpen a driver called
usb not udl, noticed that we actually had out driver pointing at the wrong
device.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/gpu/drm/drm_usb.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_usb.c b/drivers/gpu/drm/drm_usb.c
index 37c9a52..767782a 100644
--- a/drivers/gpu/drm/drm_usb.c
+++ b/drivers/gpu/drm/drm_usb.c
@@ -18,7 +18,7 @@ int drm_get_usb_dev(struct usb_interface *interface,
 
 	usbdev = interface_to_usbdev(interface);
 	dev->usbdev = usbdev;
-	dev->dev = &usbdev->dev;
+	dev->dev = &interface->dev;
 
 	mutex_lock(&drm_global_mutex);
 
-- 
1.8.1.2

[PATCH 094/139] drm/udl: make usage as a console safer

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Dave Airlie <airlied@redhat.com>

commit bcb39af4486be07e896fc374a2336bad3104ae0a upstream.

Okay you don't really want to use udl devices as your console, but if
you are unlucky enough to do so, you run into a lot of schedule while atomic
due to printk being called from all sorts of funky places. So check if we
are in an atomic context, and queue the damage for later, the next printk
should cause it to appear. This isn't ideal, but it is simple, and seems to
work okay in my testing here.

(dirty area idea came from xenfb)

fixes a bunch of sleeping while atomic issues running fbcon on udl devices.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/gpu/drm/udl/udl_drv.h |  2 ++
 drivers/gpu/drm/udl/udl_fb.c  | 44 +++++++++++++++++++++++++++++++++++++++----
 2 files changed, 42 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/udl/udl_drv.h b/drivers/gpu/drm/udl/udl_drv.h
index 87aa5f5..cc6d90f 100644
--- a/drivers/gpu/drm/udl/udl_drv.h
+++ b/drivers/gpu/drm/udl/udl_drv.h
@@ -75,6 +75,8 @@ struct udl_framebuffer {
 	struct drm_framebuffer base;
 	struct udl_gem_object *obj;
 	bool active_16; /* active on the 16-bit channel */
+	int x1, y1, x2, y2; /* dirty rect */
+	spinlock_t dirty_lock;
 };
 
 #define to_udl_fb(x) container_of(x, struct udl_framebuffer, base)
diff --git a/drivers/gpu/drm/udl/udl_fb.c b/drivers/gpu/drm/udl/udl_fb.c
index 6f6ca50..adbf85e 100644
--- a/drivers/gpu/drm/udl/udl_fb.c
+++ b/drivers/gpu/drm/udl/udl_fb.c
@@ -153,6 +153,9 @@ int udl_handle_damage(struct udl_framebuffer *fb, int x, int y,
 	struct urb *urb;
 	int aligned_x;
 	int bpp = (fb->base.bits_per_pixel / 8);
+	int x2, y2;
+	bool store_for_later = false;
+	unsigned long flags;
 
 	if (!fb->active_16)
 		return 0;
@@ -169,8 +172,6 @@ int udl_handle_damage(struct udl_framebuffer *fb, int x, int y,
 		}
 	}
 
-	start_cycles = get_cycles();
-
 	aligned_x = DL_ALIGN_DOWN(x, sizeof(unsigned long));
 	width = DL_ALIGN_UP(width + (x-aligned_x), sizeof(unsigned long));
 	x = aligned_x;
@@ -180,19 +181,53 @@ int udl_handle_damage(struct udl_framebuffer *fb, int x, int y,
 	    (y + height > fb->base.height))
 		return -EINVAL;
 
+	/* if we are in atomic just store the info
+	   can't test inside spin lock */
+	if (in_atomic())
+		store_for_later = true;
+
+	x2 = x + width - 1;
+	y2 = y + height - 1;
+
+	spin_lock_irqsave(&fb->dirty_lock, flags);
+
+	if (fb->y1 < y)
+		y = fb->y1;
+	if (fb->y2 > y2)
+		y2 = fb->y2;
+	if (fb->x1 < x)
+		x = fb->x1;
+	if (fb->x2 > x2)
+		x2 = fb->x2;
+
+	if (store_for_later) {
+		fb->x1 = x;
+		fb->x2 = x2;
+		fb->y1 = y;
+		fb->y2 = y2;
+		spin_unlock_irqrestore(&fb->dirty_lock, flags);
+		return 0;
+	}
+
+	fb->x1 = fb->y1 = INT_MAX;
+	fb->x2 = fb->y2 = 0;
+
+	spin_unlock_irqrestore(&fb->dirty_lock, flags);
+	start_cycles = get_cycles();
+
 	urb = udl_get_urb(dev);
 	if (!urb)
 		return 0;
 	cmd = urb->transfer_buffer;
 
-	for (i = y; i < y + height ; i++) {
+	for (i = y; i <= y2 ; i++) {
 		const int line_offset = fb->base.pitches[0] * i;
 		const int byte_offset = line_offset + (x * bpp);
 		const int dev_byte_offset = (fb->base.width * bpp * i) + (x * bpp);
 		if (udl_render_hline(dev, bpp, &urb,
 				     (char *) fb->obj->vmapping,
 				     &cmd, byte_offset, dev_byte_offset,
-				     width * bpp,
+				     (x2 - x + 1) * bpp,
 				     &bytes_identical, &bytes_sent))
 			goto error;
 	}
@@ -417,6 +452,7 @@ udl_framebuffer_init(struct drm_device *dev,
 {
 	int ret;
 
+	spin_lock_init(&ufb->dirty_lock);
 	ufb->obj = obj;
 	ret = drm_framebuffer_init(dev, &ufb->base, &udlfb_funcs);
 	drm_helper_mode_fill_fb_struct(&ufb->base, mode_cmd);
-- 
1.8.1.2

[PATCH 095/139] drm/udl: disable fb_defio by default

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Dave Airlie <airlied@redhat.com>

commit 677d23b70bf949f75746c80cbae92c233c6b5e2a upstream.

There seems to be a bad interaction between gem/shmem and defio on top,
I get list corruption on the page lru in the shmem code.

Turn it off for now until we get some more digging done.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/gpu/drm/udl/udl_fb.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/udl/udl_fb.c b/drivers/gpu/drm/udl/udl_fb.c
index adbf85e..c9df873 100644
--- a/drivers/gpu/drm/udl/udl_fb.c
+++ b/drivers/gpu/drm/udl/udl_fb.c
@@ -22,9 +22,9 @@
 
 #include "drm_fb_helper.h"
 
-#define DL_DEFIO_WRITE_DELAY    5 /* fb_deferred_io.delay in jiffies */
+#define DL_DEFIO_WRITE_DELAY    (HZ/20) /* fb_deferred_io.delay in jiffies */
 
-static int fb_defio = 1;  /* Optionally enable experimental fb_defio mmap support */
+static int fb_defio = 0;  /* Optionally enable experimental fb_defio mmap support */
 static int fb_bpp = 16;
 
 module_param(fb_bpp, int, S_IWUSR | S_IRUSR | S_IWGRP | S_IRGRP);
-- 
1.8.1.2

[PATCH 096/139] fb: rework locking to fix lock ordering on takeover

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Alan Cox <alan@linux.intel.com>

commit 50e244cc793d511b86adea24972f3a7264cae114 upstream.

Adjust the console layer to allow a take over call where the caller
already holds the locks.  Make the fb layer lock in order.

This is partly a band aid, the fb layer is terminally confused about the
locking rules it uses for its notifiers it seems.

[akpm@linux-foundation.org: remove stray non-ascii char, tidy comment]
[akpm@linux-foundation.org: export do_take_over_console()]
[airlied: cleanup another non-ascii char]
Signed-off-by: Alan Cox <alan@linux.intel.com>
Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Jiri Kosina <jkosina@suse.cz>
Tested-by: Sedat Dilek <sedat.dilek@gmail.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/tty/vt/vt.c           | 93 ++++++++++++++++++++++++++++++++-----------
 drivers/video/console/fbcon.c | 29 +++++++++++++-
 drivers/video/fbmem.c         |  5 +--
 drivers/video/fbsysfs.c       |  3 ++
 include/linux/console.h       |  1 +
 5 files changed, 104 insertions(+), 27 deletions(-)

diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index 3b4f5b6..f7ffae5 100644
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -3017,7 +3017,7 @@ int __init vty_init(const struct file_operations *console_fops)
 
 static struct class *vtconsole_class;
 
-static int bind_con_driver(const struct consw *csw, int first, int last,
+static int do_bind_con_driver(const struct consw *csw, int first, int last,
 			   int deflt)
 {
 	struct module *owner = csw->owner;
@@ -3028,7 +3028,7 @@ static int bind_con_driver(const struct consw *csw, int first, int last,
 	if (!try_module_get(owner))
 		return -ENODEV;
 
-	console_lock();
+	WARN_CONSOLE_UNLOCKED();
 
 	/* check if driver is registered */
 	for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
@@ -3113,11 +3113,22 @@ static int bind_con_driver(const struct consw *csw, int first, int last,
 
 	retval = 0;
 err:
-	console_unlock();
 	module_put(owner);
 	return retval;
 };
 
+
+static int bind_con_driver(const struct consw *csw, int first, int last,
+			   int deflt)
+{
+	int ret;
+
+	console_lock();
+	ret = do_bind_con_driver(csw, first, last, deflt);
+	console_unlock();
+	return ret;
+}
+
 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
 static int con_is_graphics(const struct consw *csw, int first, int last)
 {
@@ -3229,9 +3240,9 @@ int unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
 	if (!con_is_bound(csw))
 		con_driver->flag &= ~CON_DRIVER_FLAG_INIT;
 
-	console_unlock();
 	/* ignore return value, binding should not fail */
-	bind_con_driver(defcsw, first, last, deflt);
+	do_bind_con_driver(defcsw, first, last, deflt);
+	console_unlock();
 err:
 	module_put(owner);
 	return retval;
@@ -3522,28 +3533,18 @@ int con_debug_leave(void)
 }
 EXPORT_SYMBOL_GPL(con_debug_leave);
 
-/**
- * register_con_driver - register console driver to console layer
- * @csw: console driver
- * @first: the first console to take over, minimum value is 0
- * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1
- *
- * DESCRIPTION: This function registers a console driver which can later
- * bind to a range of consoles specified by @first and @last. It will
- * also initialize the console driver by calling con_startup().
- */
-int register_con_driver(const struct consw *csw, int first, int last)
+static int do_register_con_driver(const struct consw *csw, int first, int last)
 {
 	struct module *owner = csw->owner;
 	struct con_driver *con_driver;
 	const char *desc;
 	int i, retval = 0;
 
+	WARN_CONSOLE_UNLOCKED();
+
 	if (!try_module_get(owner))
 		return -ENODEV;
 
-	console_lock();
-
 	for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
 		con_driver = &registered_con_driver[i];
 
@@ -3596,10 +3597,29 @@ int register_con_driver(const struct consw *csw, int first, int last)
 	}
 
 err:
-	console_unlock();
 	module_put(owner);
 	return retval;
 }
+
+/**
+ * register_con_driver - register console driver to console layer
+ * @csw: console driver
+ * @first: the first console to take over, minimum value is 0
+ * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1
+ *
+ * DESCRIPTION: This function registers a console driver which can later
+ * bind to a range of consoles specified by @first and @last. It will
+ * also initialize the console driver by calling con_startup().
+ */
+int register_con_driver(const struct consw *csw, int first, int last)
+{
+	int retval;
+
+	console_lock();
+	retval = do_register_con_driver(csw, first, last);
+	console_unlock();
+	return retval;
+}
 EXPORT_SYMBOL(register_con_driver);
 
 /**
@@ -3653,17 +3673,44 @@ EXPORT_SYMBOL(unregister_con_driver);
  *	when a driver wants to take over some existing consoles
  *	and become default driver for newly opened ones.
  *
- *      take_over_console is basically a register followed by unbind
+ *	take_over_console is basically a register followed by unbind
+ */
+int do_take_over_console(const struct consw *csw, int first, int last, int deflt)
+{
+	int err;
+
+	err = do_register_con_driver(csw, first, last);
+	/*
+	 * If we get an busy error we still want to bind the console driver
+	 * and return success, as we may have unbound the console driver
+	 * but not unregistered it.
+	 */
+	if (err == -EBUSY)
+		err = 0;
+	if (!err)
+		do_bind_con_driver(csw, first, last, deflt);
+
+	return err;
+}
+EXPORT_SYMBOL_GPL(do_take_over_console);
+
+/*
+ *	If we support more console drivers, this function is used
+ *	when a driver wants to take over some existing consoles
+ *	and become default driver for newly opened ones.
+ *
+ *	take_over_console is basically a register followed by unbind
  */
 int take_over_console(const struct consw *csw, int first, int last, int deflt)
 {
 	int err;
 
 	err = register_con_driver(csw, first, last);
-	/* if we get an busy error we still want to bind the console driver
+	/*
+	 * If we get an busy error we still want to bind the console driver
 	 * and return success, as we may have unbound the console driver
-	 * but not unregistered it.
-	*/
+	 * but not unregistered it.
+	 */
 	if (err == -EBUSY)
 		err = 0;
 	if (!err)
diff --git a/drivers/video/console/fbcon.c b/drivers/video/console/fbcon.c
index bdcd34d..7ccec55 100644
--- a/drivers/video/console/fbcon.c
+++ b/drivers/video/console/fbcon.c
@@ -529,6 +529,33 @@ static int search_for_mapped_con(void)
 	return retval;
 }
 
+static int do_fbcon_takeover(int show_logo)
+{
+	int err, i;
+
+	if (!num_registered_fb)
+		return -ENODEV;
+
+	if (!show_logo)
+		logo_shown = FBCON_LOGO_DONTSHOW;
+
+	for (i = first_fb_vc; i <= last_fb_vc; i++)
+		con2fb_map[i] = info_idx;
+
+	err = do_take_over_console(&fb_con, first_fb_vc, last_fb_vc,
+				fbcon_is_default);
+
+	if (err) {
+		for (i = first_fb_vc; i <= last_fb_vc; i++)
+			con2fb_map[i] = -1;
+		info_idx = -1;
+	} else {
+		fbcon_has_console_bind = 1;
+	}
+
+	return err;
+}
+
 static int fbcon_takeover(int show_logo)
 {
 	int err, i;
@@ -3121,7 +3148,7 @@ static int fbcon_fb_registered(struct fb_info *info)
 		}
 
 		if (info_idx != -1)
-			ret = fbcon_takeover(1);
+			ret = do_fbcon_takeover(1);
 	} else {
 		for (i = first_fb_vc; i <= last_fb_vc; i++) {
 			if (con2fb_map_boot[i] == idx)
diff --git a/drivers/video/fbmem.c b/drivers/video/fbmem.c
index 0dff12a..616278a 100644
--- a/drivers/video/fbmem.c
+++ b/drivers/video/fbmem.c
@@ -1651,7 +1651,9 @@ static int do_register_framebuffer(struct fb_info *fb_info)
 	event.info = fb_info;
 	if (!lock_fb_info(fb_info))
 		return -ENODEV;
+	console_lock();
 	fb_notifier_call_chain(FB_EVENT_FB_REGISTERED, &event);
+	console_unlock();
 	unlock_fb_info(fb_info);
 	return 0;
 }
@@ -1854,11 +1856,8 @@ int fb_new_modelist(struct fb_info *info)
 	err = 1;
 
 	if (!list_empty(&info->modelist)) {
-		if (!lock_fb_info(info))
-			return -ENODEV;
 		event.info = info;
 		err = fb_notifier_call_chain(FB_EVENT_NEW_MODELIST, &event);
-		unlock_fb_info(info);
 	}
 
 	return err;
diff --git a/drivers/video/fbsysfs.c b/drivers/video/fbsysfs.c
index a55e366..ef476b0 100644
--- a/drivers/video/fbsysfs.c
+++ b/drivers/video/fbsysfs.c
@@ -177,6 +177,8 @@ static ssize_t store_modes(struct device *device,
 	if (i * sizeof(struct fb_videomode) != count)
 		return -EINVAL;
 
+	if (!lock_fb_info(fb_info))
+		return -ENODEV;
 	console_lock();
 	list_splice(&fb_info->modelist, &old_list);
 	fb_videomode_to_modelist((const struct fb_videomode *)buf, i,
@@ -188,6 +190,7 @@ static ssize_t store_modes(struct device *device,
 		fb_destroy_modelist(&old_list);
 
 	console_unlock();
+	unlock_fb_info(fb_info);
 
 	return 0;
 }
diff --git a/include/linux/console.h b/include/linux/console.h
index 7201ce4..e8ea7d7 100644
--- a/include/linux/console.h
+++ b/include/linux/console.h
@@ -78,6 +78,7 @@ int con_is_bound(const struct consw *csw);
 int register_con_driver(const struct consw *csw, int first, int last);
 int unregister_con_driver(const struct consw *csw);
 int take_over_console(const struct consw *sw, int first, int last, int deflt);
+int do_take_over_console(const struct consw *sw, int first, int last, int deflt);
 void give_up_console(const struct consw *sw);
 #ifdef CONFIG_HW_CONSOLE
 int con_debug_enter(struct vc_data *vc);
-- 
1.8.1.2

[PATCH 097/139] fb: Yet another band-aid for fixing lockdep mess

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Takashi Iwai <tiwai@suse.de>

commit e93a9a868792ad71cdd09d75e5a02d8067473c4e upstream.

I've still got lockdep warnings even after Alan's patch, and it seems that
yet more band aids are required to paper over similar paths for
unbind_con_driver() and unregister_con_driver().  After this hack, lockdep
warnings are finally gone.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Cc: Alan Cox <alan@linux.intel.com>
Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Jiri Kosina <jkosina@suse.cz>
Tested-by: Sedat Dilek <sedat.dilek@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/tty/vt/vt.c           | 43 ++++++++++++++++++++++++++++---------------
 drivers/video/console/fbcon.c |  4 ++--
 drivers/video/fbmem.c         |  4 ++++
 include/linux/console.h       |  1 +
 include/linux/vt_kern.h       |  2 ++
 5 files changed, 37 insertions(+), 17 deletions(-)

diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index f7ffae5..d2f0b26 100644
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -3165,6 +3165,18 @@ static int con_is_graphics(const struct consw *csw, int first, int last)
  */
 int unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
 {
+	int retval;
+
+	console_lock();
+	retval = do_unbind_con_driver(csw, first, last, deflt);
+	console_unlock();
+	return retval;
+}
+EXPORT_SYMBOL(unbind_con_driver);
+
+/* unlocked version of unbind_con_driver() */
+int do_unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
+{
 	struct module *owner = csw->owner;
 	const struct consw *defcsw = NULL;
 	struct con_driver *con_driver = NULL, *con_back = NULL;
@@ -3173,7 +3185,7 @@ int unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
 	if (!try_module_get(owner))
 		return -ENODEV;
 
-	console_lock();
+	WARN_CONSOLE_UNLOCKED();
 
 	/* check if driver is registered and if it is unbindable */
 	for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
@@ -3186,10 +3198,8 @@ int unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
 		}
 	}
 
-	if (retval) {
-		console_unlock();
+	if (retval)
 		goto err;
-	}
 
 	retval = -ENODEV;
 
@@ -3205,15 +3215,11 @@ int unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
 		}
 	}
 
-	if (retval) {
-		console_unlock();
+	if (retval)
 		goto err;
-	}
 
-	if (!con_is_bound(csw)) {
-		console_unlock();
+	if (!con_is_bound(csw))
 		goto err;
-	}
 
 	first = max(first, con_driver->first);
 	last = min(last, con_driver->last);
@@ -3242,13 +3248,12 @@ int unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
 
 	/* ignore return value, binding should not fail */
 	do_bind_con_driver(defcsw, first, last, deflt);
-	console_unlock();
 err:
 	module_put(owner);
 	return retval;
 
 }
-EXPORT_SYMBOL(unbind_con_driver);
+EXPORT_SYMBOL_GPL(do_unbind_con_driver);
 
 static int vt_bind(struct con_driver *con)
 {
@@ -3635,9 +3640,18 @@ EXPORT_SYMBOL(register_con_driver);
  */
 int unregister_con_driver(const struct consw *csw)
 {
-	int i, retval = -ENODEV;
+	int retval;
 
 	console_lock();
+	retval = do_unregister_con_driver(csw);
+	console_unlock();
+	return retval;
+}
+EXPORT_SYMBOL(unregister_con_driver);
+
+int do_unregister_con_driver(const struct consw *csw)
+{
+	int i, retval = -ENODEV;
 
 	/* cannot unregister a bound driver */
 	if (con_is_bound(csw))
@@ -3663,10 +3677,9 @@ int unregister_con_driver(const struct consw *csw)
 		}
 	}
 err:
-	console_unlock();
 	return retval;
 }
-EXPORT_SYMBOL(unregister_con_driver);
+EXPORT_SYMBOL_GPL(do_unregister_con_driver);
 
 /*
  *	If we support more console drivers, this function is used
diff --git a/drivers/video/console/fbcon.c b/drivers/video/console/fbcon.c
index 7ccec55..5bf163e 100644
--- a/drivers/video/console/fbcon.c
+++ b/drivers/video/console/fbcon.c
@@ -3010,7 +3010,7 @@ static int fbcon_unbind(void)
 {
 	int ret;
 
-	ret = unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc,
+	ret = do_unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc,
 				fbcon_is_default);
 
 	if (!ret)
@@ -3083,7 +3083,7 @@ static int fbcon_fb_unregistered(struct fb_info *info)
 		primary_device = -1;
 
 	if (!num_registered_fb)
-		unregister_con_driver(&fb_con);
+		do_unregister_con_driver(&fb_con);
 
 	return 0;
 }
diff --git a/drivers/video/fbmem.c b/drivers/video/fbmem.c
index 616278a..afa804f 100644
--- a/drivers/video/fbmem.c
+++ b/drivers/video/fbmem.c
@@ -1669,8 +1669,10 @@ static int do_unregister_framebuffer(struct fb_info *fb_info)
 
 	if (!lock_fb_info(fb_info))
 		return -ENODEV;
+	console_lock();
 	event.info = fb_info;
 	ret = fb_notifier_call_chain(FB_EVENT_FB_UNBIND, &event);
+	console_unlock();
 	unlock_fb_info(fb_info);
 
 	if (ret)
@@ -1685,7 +1687,9 @@ static int do_unregister_framebuffer(struct fb_info *fb_info)
 	num_registered_fb--;
 	fb_cleanup_device(fb_info);
 	event.info = fb_info;
+	console_lock();
 	fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED, &event);
+	console_unlock();
 
 	/* this may free fb info */
 	put_fb_info(fb_info);
diff --git a/include/linux/console.h b/include/linux/console.h
index e8ea7d7..f59e942 100644
--- a/include/linux/console.h
+++ b/include/linux/console.h
@@ -77,6 +77,7 @@ extern const struct consw prom_con;	/* SPARC PROM console */
 int con_is_bound(const struct consw *csw);
 int register_con_driver(const struct consw *csw, int first, int last);
 int unregister_con_driver(const struct consw *csw);
+int do_unregister_con_driver(const struct consw *csw);
 int take_over_console(const struct consw *sw, int first, int last, int deflt);
 int do_take_over_console(const struct consw *sw, int first, int last, int deflt);
 void give_up_console(const struct consw *sw);
diff --git a/include/linux/vt_kern.h b/include/linux/vt_kern.h
index 1f55665..e8d6571 100644
--- a/include/linux/vt_kern.h
+++ b/include/linux/vt_kern.h
@@ -131,6 +131,8 @@ void vt_event_post(unsigned int event, unsigned int old, unsigned int new);
 int vt_waitactive(int n);
 void change_console(struct vc_data *new_vc);
 void reset_vc(struct vc_data *vc);
+extern int do_unbind_con_driver(const struct consw *csw, int first, int last,
+			     int deflt);
 extern int unbind_con_driver(const struct consw *csw, int first, int last,
 			     int deflt);
 int vty_init(const struct file_operations *console_fops);
-- 
1.8.1.2

[PATCH 098/139] Revert "drm: Add EDID_QUIRK_FORCE_REDUCED_BLANKING for ASUS VW222S"

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Daniel Vetter <daniel.vetter@ffwll.ch>

commit db3985e5ca8f50fc17606855ba394783d11683a5 upstream.

This reverts commit 6f33814bd4d9cfe76033a31b1c0c76c960cd8e4b.

The quirk cause a regression, and it looks like the original bug was
simply a lack of FIFO bandwidth on the i915G of the reporter. Which
should eventually be fixed as soon as we get around to implemented
DSPARB FIFO reassignment on gen 3.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=52281
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/gpu/drm/drm_edid.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index b7ee230..a8743c3 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -87,9 +87,6 @@ static struct edid_quirk {
 	int product_id;
 	u32 quirks;
 } edid_quirk_list[] = {
-	/* ASUS VW222S */
-	{ "ACI", 0x22a2, EDID_QUIRK_FORCE_REDUCED_BLANKING },
-
 	/* Acer AL1706 */
 	{ "ACR", 44358, EDID_QUIRK_PREFER_LARGE_60 },
 	/* Acer F51 */
-- 
1.8.1.2

[PATCH 099/139] ext4: fix xattr block allocation/release with bigalloc

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Lukas Czerner <lczerner@redhat.com>

commit 1231b3a1eb5740192aeebf5344dd6d6da000febf upstream.

Currently when new xattr block is created or released we we would call
dquot_free_block() or dquot_alloc_block() respectively, among the else
decrementing or incrementing the number of blocks assigned to the
inode by one block.

This however does not work for bigalloc file system because we always
allocate/free the whole cluster so we have to count with that in
dquot_free_block() and dquot_alloc_block() as well.

Use the clusters-to-blocks conversion EXT4_C2B() when passing number of
blocks to the dquot_alloc/free functions to fix the problem.

The problem has been revealed by xfstests #117 (and possibly others).

Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 fs/ext4/xattr.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
index 3390680..1d261e6 100644
--- a/fs/ext4/xattr.c
+++ b/fs/ext4/xattr.c
@@ -554,7 +554,7 @@ ext4_xattr_release_block(handle_t *handle, struct inode *inode,
 		error = ext4_handle_dirty_xattr_block(handle, inode, bh);
 		if (IS_SYNC(inode))
 			ext4_handle_sync(handle);
-		dquot_free_block(inode, 1);
+		dquot_free_block(inode, EXT4_C2B(EXT4_SB(inode->i_sb), 1));
 		ea_bdebug(bh, "refcount now=%d; releasing",
 			  le32_to_cpu(BHDR(bh)->h_refcount));
 	}
@@ -843,7 +843,8 @@ inserted:
 			else {
 				/* The old block is released after updating
 				   the inode. */
-				error = dquot_alloc_block(inode, 1);
+				error = dquot_alloc_block(inode,
+						EXT4_C2B(EXT4_SB(sb), 1));
 				if (error)
 					goto cleanup;
 				error = ext4_journal_get_write_access(handle,
@@ -940,7 +941,7 @@ cleanup:
 	return error;
 
 cleanup_dquot:
-	dquot_free_block(inode, 1);
+	dquot_free_block(inode, EXT4_C2B(EXT4_SB(sb), 1));
 	goto cleanup;
 
 bad_block:
-- 
1.8.1.2

[PATCH 100/139] target: Fix lookup of dynamic NodeACLs during cached demo-mode operation

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Nicholas Bellinger <nab@linux-iscsi.org>

commit fcf29481fb8e106daad6688f2e898226ee928992 upstream.

This patch fixes a bug in core_tpg_check_initiator_node_acl() ->
core_tpg_get_initiator_node_acl() where a dynamically created
se_node_acl generated during session login would be skipped during
subsequent lookup due to the '!acl->dynamic_node_acl' check, causing
a new se_node_acl to be created with a duplicate ->initiatorname.

This would occur when a fabric endpoint was configured with
TFO->tpg_check_demo_mode()=1 + TPF->tpg_check_demo_mode_cache()=1
preventing the release of an existing se_node_acl during se_session
shutdown.

Also, drop the unnecessary usage of core_tpg_get_initiator_node_acl()
within core_dev_init_initiator_node_lun_acl() that originally
required the extra '!acl->dynamic_node_acl' check, and just pass
the configfs provided se_node_acl pointer instead.

Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/target/target_core_device.c          | 13 ++++---------
 drivers/target/target_core_fabric_configfs.c |  4 ++--
 drivers/target/target_core_internal.h        |  2 +-
 drivers/target/target_core_tpg.c             | 10 ++--------
 4 files changed, 9 insertions(+), 20 deletions(-)

diff --git a/drivers/target/target_core_device.c b/drivers/target/target_core_device.c
index 0208baa..5dafeaa 100644
--- a/drivers/target/target_core_device.c
+++ b/drivers/target/target_core_device.c
@@ -1415,24 +1415,18 @@ static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked
 
 struct se_lun_acl *core_dev_init_initiator_node_lun_acl(
 	struct se_portal_group *tpg,
+	struct se_node_acl *nacl,
 	u32 mapped_lun,
-	char *initiatorname,
 	int *ret)
 {
 	struct se_lun_acl *lacl;
-	struct se_node_acl *nacl;
 
-	if (strlen(initiatorname) >= TRANSPORT_IQN_LEN) {
+	if (strlen(nacl->initiatorname) >= TRANSPORT_IQN_LEN) {
 		pr_err("%s InitiatorName exceeds maximum size.\n",
 			tpg->se_tpg_tfo->get_fabric_name());
 		*ret = -EOVERFLOW;
 		return NULL;
 	}
-	nacl = core_tpg_get_initiator_node_acl(tpg, initiatorname);
-	if (!nacl) {
-		*ret = -EINVAL;
-		return NULL;
-	}
 	lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL);
 	if (!lacl) {
 		pr_err("Unable to allocate memory for struct se_lun_acl.\n");
@@ -1443,7 +1437,8 @@ struct se_lun_acl *core_dev_init_initiator_node_lun_acl(
 	INIT_LIST_HEAD(&lacl->lacl_list);
 	lacl->mapped_lun = mapped_lun;
 	lacl->se_lun_nacl = nacl;
-	snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname);
+	snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s",
+		 nacl->initiatorname);
 
 	return lacl;
 }
diff --git a/drivers/target/target_core_fabric_configfs.c b/drivers/target/target_core_fabric_configfs.c
index 405cc98..040751b 100644
--- a/drivers/target/target_core_fabric_configfs.c
+++ b/drivers/target/target_core_fabric_configfs.c
@@ -351,8 +351,8 @@ static struct config_group *target_fabric_make_mappedlun(
 		goto out;
 	}
 
-	lacl = core_dev_init_initiator_node_lun_acl(se_tpg, mapped_lun,
-			config_item_name(acl_ci), &ret);
+	lacl = core_dev_init_initiator_node_lun_acl(se_tpg, se_nacl,
+			mapped_lun, &ret);
 	if (!lacl) {
 		ret = -EINVAL;
 		goto out;
diff --git a/drivers/target/target_core_internal.h b/drivers/target/target_core_internal.h
index 165e824..e57190d 100644
--- a/drivers/target/target_core_internal.h
+++ b/drivers/target/target_core_internal.h
@@ -61,7 +61,7 @@ struct se_lun *core_dev_add_lun(struct se_portal_group *, struct se_hba *,
 int	core_dev_del_lun(struct se_portal_group *, u32);
 struct se_lun *core_get_lun_from_tpg(struct se_portal_group *, u32);
 struct se_lun_acl *core_dev_init_initiator_node_lun_acl(struct se_portal_group *,
-		u32, char *, int *);
+		struct se_node_acl *, u32, int *);
 int	core_dev_add_initiator_node_lun_acl(struct se_portal_group *,
 		struct se_lun_acl *, u32, u32);
 int	core_dev_del_initiator_node_lun_acl(struct se_portal_group *,
diff --git a/drivers/target/target_core_tpg.c b/drivers/target/target_core_tpg.c
index 8bd58e2..6eee53f 100644
--- a/drivers/target/target_core_tpg.c
+++ b/drivers/target/target_core_tpg.c
@@ -114,16 +114,10 @@ struct se_node_acl *core_tpg_get_initiator_node_acl(
 	struct se_node_acl *acl;
 
 	spin_lock_irq(&tpg->acl_node_lock);
-	list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
-		if (!strcmp(acl->initiatorname, initiatorname) &&
-		    !acl->dynamic_node_acl) {
-			spin_unlock_irq(&tpg->acl_node_lock);
-			return acl;
-		}
-	}
+	acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname);
 	spin_unlock_irq(&tpg->acl_node_lock);
 
-	return NULL;
+	return acl;
 }
 
 /*	core_tpg_add_node_to_devs():
-- 
1.8.1.2

[PATCH 101/139] target: Add missing mapped_lun bounds checking during make_mappedlun setup

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Nicholas Bellinger <nab@linux-iscsi.org>

commit fbbf8555a986ed31e54f006b6cc637ea4ff1425b upstream.

This patch adds missing bounds checking for the configfs provided
mapped_lun value during target_fabric_make_mappedlun() setup ahead
of se_lun_acl initialization.

This addresses a potential OOPs when using a mapped_lun value that
exceeds the hardcoded TRANSPORT_MAX_LUNS_PER_TPG-1 value within
se_node_acl->device_list[].

Reported-by: Jan Engelhardt <jengelh@inai.de>
Cc: Jan Engelhardt <jengelh@inai.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/target/target_core_fabric_configfs.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/target/target_core_fabric_configfs.c b/drivers/target/target_core_fabric_configfs.c
index 040751b..c42143b 100644
--- a/drivers/target/target_core_fabric_configfs.c
+++ b/drivers/target/target_core_fabric_configfs.c
@@ -350,6 +350,14 @@ static struct config_group *target_fabric_make_mappedlun(
 		ret = -EINVAL;
 		goto out;
 	}
+	if (mapped_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
+		pr_err("Mapped LUN: %lu exceeds TRANSPORT_MAX_LUNS_PER_TPG"
+			"-1: %u for Target Portal Group: %u\n", mapped_lun,
+			TRANSPORT_MAX_LUNS_PER_TPG-1,
+			se_tpg->se_tpg_tfo->tpg_get_tag(se_tpg));
+		ret = -EINVAL;
+		goto out;
+	}
 
 	lacl = core_dev_init_initiator_node_lun_acl(se_tpg, se_nacl,
 			mapped_lun, &ret);
-- 
1.8.1.2

[PATCH 102/139] ftrace: Call ftrace cleanup module notifier after all other notifiers

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: "Steven Rostedt (Red Hat)" <rostedt@goodmis.org>

commit 8c189ea64eea01ca20d102ddb74d6936dd16c579 upstream.

Commit: c1bf08ac "ftrace: Be first to run code modification on modules"

changed ftrace module notifier's priority to INT_MAX in order to
process the ftrace nops before anything else could touch them
(namely kprobes). This was the correct thing to do.

Unfortunately, the ftrace module notifier also contains the ftrace
clean up code. As opposed to the set up code, this code should be
run *after* all the module notifiers have run in case a module is doing
correct clean-up and unregisters its ftrace hooks. Basically, ftrace
needs to do clean up on module removal, as it needs to know about code
being removed so that it doesn't try to modify that code. But after it
removes the module from its records, if a ftrace user tries to remove
a probe, that removal will fail due as the record of that code segment
no longer exists.

Nothing really bad happens if the probe removal is called after ftrace
did the clean up, but the ftrace removal function will return an error.
Correct code (such as kprobes) will produce a WARN_ON() if it fails
to remove the probe. As people get annoyed by frivolous warnings, it's
best to do the ftrace clean up after everything else.

By splitting the ftrace_module_notifier into two notifiers, one that
does the module load setup that is run at high priority, and the other
that is called for module clean up that is run at low priority, the
problem is solved.

Reported-by: Frank Ch. Eigler <fche@redhat.com>
Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 kernel/trace/ftrace.c | 46 ++++++++++++++++++++++++++++++++--------------
 1 file changed, 32 insertions(+), 14 deletions(-)

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 793e367..e5a77ba 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -3835,37 +3835,51 @@ static void ftrace_init_module(struct module *mod,
 	ftrace_process_locs(mod, start, end);
 }
 
-static int ftrace_module_notify(struct notifier_block *self,
-				unsigned long val, void *data)
+static int ftrace_module_notify_enter(struct notifier_block *self,
+				      unsigned long val, void *data)
 {
 	struct module *mod = data;
 
-	switch (val) {
-	case MODULE_STATE_COMING:
+	if (val == MODULE_STATE_COMING)
 		ftrace_init_module(mod, mod->ftrace_callsites,
 				   mod->ftrace_callsites +
 				   mod->num_ftrace_callsites);
-		break;
-	case MODULE_STATE_GOING:
+	return 0;
+}
+
+static int ftrace_module_notify_exit(struct notifier_block *self,
+				     unsigned long val, void *data)
+{
+	struct module *mod = data;
+
+	if (val == MODULE_STATE_GOING)
 		ftrace_release_mod(mod);
-		break;
-	}
 
 	return 0;
 }
 #else
-static int ftrace_module_notify(struct notifier_block *self,
-				unsigned long val, void *data)
+static int ftrace_module_notify_enter(struct notifier_block *self,
+				      unsigned long val, void *data)
+{
+	return 0;
+}
+static int ftrace_module_notify_exit(struct notifier_block *self,
+				     unsigned long val, void *data)
 {
 	return 0;
 }
 #endif /* CONFIG_MODULES */
 
-struct notifier_block ftrace_module_nb = {
-	.notifier_call = ftrace_module_notify,
+struct notifier_block ftrace_module_enter_nb = {
+	.notifier_call = ftrace_module_notify_enter,
 	.priority = INT_MAX,	/* Run before anything that can use kprobes */
 };
 
+struct notifier_block ftrace_module_exit_nb = {
+	.notifier_call = ftrace_module_notify_exit,
+	.priority = INT_MIN,	/* Run after anything that can remove kprobes */
+};
+
 extern unsigned long __start_mcount_loc[];
 extern unsigned long __stop_mcount_loc[];
 
@@ -3897,9 +3911,13 @@ void __init ftrace_init(void)
 				  __start_mcount_loc,
 				  __stop_mcount_loc);
 
-	ret = register_module_notifier(&ftrace_module_nb);
+	ret = register_module_notifier(&ftrace_module_enter_nb);
+	if (ret)
+		pr_warning("Failed to register trace ftrace module enter notifier\n");
+
+	ret = register_module_notifier(&ftrace_module_exit_nb);
 	if (ret)
-		pr_warning("Failed to register trace ftrace module notifier\n");
+		pr_warning("Failed to register trace ftrace module exit notifier\n");
 
 	set_ftrace_early_filters();
 
-- 
1.8.1.2

[PATCH 103/139] drm: don't add inferred modes for monitors that don't support them

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Paulo Zanoni <paulo.r.zanoni@intel.com>

commit 196e077dc165a307efbd9e7569f81bbdbcf18f65 upstream.

If bit 0 of the features byte (0x18) is set to 0, then, according to
the EDID spec, "the display is non-continuous frequency (multi-mode)
and is only specified to accept the video timing formats that are
listed in Base EDID and certain Extension Blocks".

For more information, please see the EDID spec, check the notes of the
table that explains the "Feature Support" byte (18h) and also the
notes on the tables of the section that explains "Display Range Limits
& Additional Timing Description Definition (tag #FDh)".

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=45729
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/gpu/drm/drm_edid.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index a8743c3..74f2421 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -1921,7 +1921,8 @@ int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid)
 	num_modes += add_cvt_modes(connector, edid);
 	num_modes += add_standard_modes(connector, edid);
 	num_modes += add_established_modes(connector, edid);
-	num_modes += add_inferred_modes(connector, edid);
+	if (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF)
+		num_modes += add_inferred_modes(connector, edid);
 	num_modes += add_cea_modes(connector, edid);
 
 	if (quirks & (EDID_QUIRK_PREFER_LARGE_60 | EDID_QUIRK_PREFER_LARGE_75))
-- 
1.8.1.2

[PATCH 104/139] drm/i915: disable shared panel fitter for pipe

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Mika Kuoppala <mika.kuoppala@linux.intel.com>

commit 24a1f16de97c4cf0029d9acd04be06db32208726 upstream.

If encoder is switched off by BIOS, but the panel fitter is left on,
we never try to turn off the panel fitter and leave it still attached
to the pipe - which can cause blurry output elsewhere.

Based on work by Chris Wilson <chris@chris-wilson.co.uk>

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=58867
Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
Tested-by: Andreas Sturmlechner <andreas.sturmlechner@gmail.com>
[danvet: Remove the redundant HAS_PCH_SPLIT check and add a tiny
comment.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
[ luis: adjust context ]
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/gpu/drm/i915/intel_display.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index b61bc50..bff2719 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -3226,6 +3226,7 @@ static void i9xx_crtc_disable(struct drm_crtc *crtc)
 	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 	int pipe = intel_crtc->pipe;
 	int plane = intel_crtc->plane;
+	u32 pctl;
 
 	if (!intel_crtc->active)
 		return;
@@ -3241,6 +3242,13 @@ static void i9xx_crtc_disable(struct drm_crtc *crtc)
 
 	intel_disable_plane(dev_priv, plane, pipe);
 	intel_disable_pipe(dev_priv, pipe);
+
+	/* Disable pannel fitter if it is on this pipe. */
+	pctl = I915_READ(PFIT_CONTROL);
+	if ((pctl & PFIT_ENABLE) &&
+	    ((pctl & PFIT_PIPE_MASK) >> PFIT_PIPE_SHIFT) == pipe)
+		I915_WRITE(PFIT_CONTROL, 0);
+
 	intel_disable_pll(dev_priv, pipe);
 
 	intel_crtc->active = false;
-- 
1.8.1.2

[PATCH 105/139] drm: Fill depth/bits_per_pixel for C8 format

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= <ville.syrjala@linux.intel.com>

commit c51a6bc5f6d328926a9a4a1247c5030faf190a80 upstream.

Set depth/bits_per_pixel to 8 for C8 format.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Acked-by: Dave Airlie <airlied@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/gpu/drm/drm_crtc.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index af81f77..2ca9737 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -3633,6 +3633,7 @@ void drm_fb_get_bpp_depth(uint32_t format, unsigned int *depth,
 			  int *bpp)
 {
 	switch (format) {
+	case DRM_FORMAT_C8:
 	case DRM_FORMAT_RGB332:
 	case DRM_FORMAT_BGR233:
 		*depth = 8;
-- 
1.8.1.2

[PATCH 106/139] drm: Use C8 instead of RGB332 when determining the format from depth/bpp

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= <ville.syrjala@linux.intel.com>

commit d84f031bd230fdf9c3b7734940c859bf28b90219 upstream.

Support for real RGB332 is a rarity, most hardware only really support
C8. So use C8 instead of RGB332 when determining the format based on
depth/bpp.

This fixes 8bpp fbcon on i915, since i915 will only accept C8 and not
RGB332.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=59572
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Acked-by: Dave Airlie <airlied@gmail.com>
Tested-by: mlsemon35@gmail.com
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/gpu/drm/drm_crtc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 2ca9737..3859f43 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -2023,7 +2023,7 @@ uint32_t drm_mode_legacy_fb_format(uint32_t bpp, uint32_t depth)
 
 	switch (bpp) {
 	case 8:
-		fmt = DRM_FORMAT_RGB332;
+		fmt = DRM_FORMAT_C8;
 		break;
 	case 16:
 		if (depth == 15)
-- 
1.8.1.2

[PATCH 107/139] drm/i915: add missing \n to UTS_RELEASE in the error_state

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jani Nikula <jani.nikula@intel.com>

commit fdfa175d0a9cfa2082ce24e67e284e5acbba452a upstream.

Amending
commit 4518f611ba21ba165ea3714055938a8984a44ff9
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Wed Jan 23 16:16:35 2013 +0100

    drm/i915: dump UTS_RELEASE into the error_state

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/gpu/drm/i915/i915_debugfs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 3459e27..5ec5222 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -710,7 +710,7 @@ static int i915_error_state(struct seq_file *m, void *unused)
 
 	seq_printf(m, "Time: %ld s %ld us\n", error->time.tv_sec,
 		   error->time.tv_usec);
-	seq_printf(m, "Kernel: " UTS_RELEASE);
+	seq_printf(m, "Kernel: " UTS_RELEASE "\n");
 	seq_printf(m, "PCI ID: 0x%04x\n", dev->pci_device);
 	seq_printf(m, "EIR: 0x%08x\n", error->eir);
 	seq_printf(m, "IER: 0x%08x\n", error->ier);
-- 
1.8.1.2

[PATCH 108/139] drm/i915: Set i9xx sdvo clock limits according to specifications

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>

commit 4f7dfb6788dd022446847fbbfbe45e13bedb5be2 upstream.

The Intel PRM says the M1 and M2 divisors must be in the range of 10-20 and 5-9.
Since we do all calculations based on them being register values (which are
subtracted by 2) we need to specify them accordingly.

Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=56359
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/gpu/drm/i915/intel_display.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index bff2719..78e4274 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -141,8 +141,8 @@ static const intel_limit_t intel_limits_i9xx_sdvo = {
 	.vco = { .min = 1400000, .max = 2800000 },
 	.n = { .min = 1, .max = 6 },
 	.m = { .min = 70, .max = 120 },
-	.m1 = { .min = 10, .max = 22 },
-	.m2 = { .min = 5, .max = 9 },
+	.m1 = { .min = 8, .max = 18 },
+	.m2 = { .min = 3, .max = 7 },
 	.p = { .min = 5, .max = 80 },
 	.p1 = { .min = 1, .max = 8 },
 	.p2 = { .dot_limit = 200000,
-- 
1.8.1.2

[PATCH 109/139] drm/i915: inverted brightness quirk for Acer Aspire 4736Z

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Daniel Vetter <daniel.vetter@ffwll.ch>

commit ac4199e0f047546aa40172785e26c82b54bbe811 upstream.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=53881
Cc: Jani Nikula <jani.nikula@intel.com>
Tested-by: Jani Monoses <jani@ubuntu.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
[ luis: adjust context ]
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/gpu/drm/i915/intel_display.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 78e4274..142a918 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -6912,6 +6912,9 @@ static struct intel_quirk intel_quirks[] = {
 
 	/* Acer Aspire 5734Z must invert backlight brightness */
 	{ 0x2a42, 0x1025, 0x0459, quirk_invert_brightness },
+
+	/* Acer Aspire 4736Z */
+	{ 0x2a42, 0x1025, 0x0260, quirk_invert_brightness },
 };
 
 static void intel_init_quirks(struct drm_device *dev)
-- 
1.8.1.2

[PATCH 110/139] intel/iommu: force writebuffer-flush quirk on Gen 4 Chipsets

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Daniel Vetter <daniel.vetter@ffwll.ch>

commit 210561ffd72d00eccf12c0131b8024d5436bae95 upstream.

We already have the quirk entry for the mobile platform, but also
reports on some desktop versions. So be paranoid and set it
everywhere.

References: http://www.mail-archive.com/dri-devel@lists.freedesktop.org/msg33138.html
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: "Sankaran, Rajesh" <rajesh.sankaran@intel.com>
Reported-and-tested-by: Mihai Moldovan <ionic@ionic.de>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/iommu/intel-iommu.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 1f78d86..eafc4ed 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -4210,13 +4210,19 @@ static void __devinit quirk_iommu_rwbf(struct pci_dev *dev)
 {
 	/*
 	 * Mobile 4 Series Chipset neglects to set RWBF capability,
-	 * but needs it:
+	 * but needs it. Same seems to hold for the desktop versions.
 	 */
 	printk(KERN_INFO "DMAR: Forcing write-buffer flush capability\n");
 	rwbf_quirk = 1;
 }
 
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2a40, quirk_iommu_rwbf);
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2e00, quirk_iommu_rwbf);
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2e10, quirk_iommu_rwbf);
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2e20, quirk_iommu_rwbf);
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2e30, quirk_iommu_rwbf);
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2e40, quirk_iommu_rwbf);
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2e90, quirk_iommu_rwbf);
 
 #define GGC 0x52
 #define GGC_MEMORY_SIZE_MASK	(0xf << 8)
-- 
1.8.1.2

[PATCH 111/139] drm/radeon: remove overzealous warning in hdmi handling

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Alex Deucher <alexander.deucher@amd.com>

commit c944b2abb067130542055666f23409fd5e1afc8e upstream.

hdmi audio works fine.  The warning just confuses users.

fixes:
https://bugzilla.kernel.org/show_bug.cgi?id=44341

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/gpu/drm/radeon/r600_hdmi.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/gpu/drm/radeon/r600_hdmi.c b/drivers/gpu/drm/radeon/r600_hdmi.c
index 82a0a4c..851a477 100644
--- a/drivers/gpu/drm/radeon/r600_hdmi.c
+++ b/drivers/gpu/drm/radeon/r600_hdmi.c
@@ -545,7 +545,6 @@ void r600_hdmi_disable(struct drm_encoder *encoder)
 
 	/* Called for ATOM_ENCODER_MODE_HDMI only */
 	if (!dig || !dig->afmt) {
-		WARN_ON(1);
 		return;
 	}
 	if (!dig->afmt->enabled)
-- 
1.8.1.2

[PATCH 112/139] x86, efi: Make "noefi" really disable EFI runtime serivces

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Matt Fleming <matt.fleming@intel.com>

commit fb834c7acc5e140cf4f9e86da93a66de8c0514da upstream.

commit 1de63d60cd5b ("efi: Clear EFI_RUNTIME_SERVICES rather than
EFI_BOOT by "noefi" boot parameter") attempted to make "noefi" true to
its documentation and disable EFI runtime services to prevent the
bricking bug described in commit e0094244e41c ("samsung-laptop:
Disable on EFI hardware"). However, it's not possible to clear
EFI_RUNTIME_SERVICES from an early param function because
EFI_RUNTIME_SERVICES is set in efi_init() *after* parse_early_param().

This resulted in "noefi" effectively becoming a no-op and no longer
providing users with a way to disable EFI, which is bad for those
users that have buggy machines.

Reported-by: Walt Nelson Jr <walt0924@gmail.com>
Cc: Satoru Takeuchi <takeuchi_satoru@jp.fujitsu.com>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
Link: http://lkml.kernel.org/r/1361392572-25657-1-git-send-email-matt@console-pimps.org
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 arch/x86/platform/efi/efi.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c
index 3705bb0..1e40637 100644
--- a/arch/x86/platform/efi/efi.c
+++ b/arch/x86/platform/efi/efi.c
@@ -84,9 +84,10 @@ int efi_enabled(int facility)
 }
 EXPORT_SYMBOL(efi_enabled);
 
+static bool disable_runtime = false;
 static int __init setup_noefi(char *arg)
 {
-	clear_bit(EFI_RUNTIME_SERVICES, &x86_efi_facility);
+	disable_runtime = true;
 	return 0;
 }
 early_param("noefi", setup_noefi);
@@ -733,7 +734,7 @@ void __init efi_init(void)
 	if (!efi_is_native())
 		pr_info("No EFI runtime due to 32/64-bit mismatch with kernel\n");
 	else {
-		if (efi_runtime_init())
+		if (disable_runtime || efi_runtime_init())
 			return;
 		set_bit(EFI_RUNTIME_SERVICES, &x86_efi_facility);
 	}
-- 
1.8.1.2

[PATCH 113/139] posix-timer: Don't call idr_find() with out-of-range ID

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Tejun Heo <tj@kernel.org>

commit e182bb38d7db7494fa5dcd82da17fe0dedf60ecf upstream.

When idr_find() was fed a negative ID, it used to look up the ID
ignoring the sign bit before recent ("idr: remove MAX_IDR_MASK and
move left MAX_IDR_* into idr.c") patch. Now a negative ID triggers
a WARN_ON_ONCE().

__lock_timer() feeds timer_id from userland directly to idr_find()
without sanitizing it which can trigger the above malfunctions.  Add a
range check on @timer_id before invoking idr_find() in __lock_timer().

While timer_t is defined as int by all archs at the moment, Andrew
worries that it may be defined as a larger type later on.  Make the
test cover larger integers too so that it at least is guaranteed to
not return the wrong timer.

Note that WARN_ON_ONCE() in idr_find() on id < 0 is transitional
precaution while moving away from ignoring MSB.  Once it's gone we can
remove the guard as long as timer_t isn't larger than int.

Signed-off-by: Tejun Heo <tj@kernel.org>nnn
Reported-by: Sasha Levin <sasha.levin@oracle.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Link: http://lkml.kernel.org/r/20130220232412.GL3570@htj.dyndns.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 kernel/posix-timers.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/kernel/posix-timers.c b/kernel/posix-timers.c
index 69185ae..e885be1 100644
--- a/kernel/posix-timers.c
+++ b/kernel/posix-timers.c
@@ -639,6 +639,13 @@ static struct k_itimer *__lock_timer(timer_t timer_id, unsigned long *flags)
 {
 	struct k_itimer *timr;
 
+	/*
+	 * timer_t could be any type >= int and we want to make sure any
+	 * @timer_id outside positive int range fails lookup.
+	 */
+	if ((unsigned long long)timer_id > INT_MAX)
+		return NULL;
+
 	rcu_read_lock();
 	timr = idr_find(&posix_timers_id, (int)timer_id);
 	if (timr) {
-- 
1.8.1.2

[PATCH 114/139] ext4: fix free clusters calculation in bigalloc filesystem

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Lukas Czerner <lczerner@redhat.com>

commit 304e220f0879198b1f5309ad6f0be862b4009491 upstream.

ext4_has_free_clusters() should tell us whether there is enough free
clusters to allocate, however number of free clusters in the file system
is converted to blocks using EXT4_C2B() which is not only wrong use of
the macro (we should have used EXT4_NUM_B2C) but it's also completely
wrong concept since everything else is in cluster units.

Moreover when calculating number of root clusters we should be using
macro EXT4_NUM_B2C() instead of EXT4_B2C() otherwise the result might be
off by one. However r_blocks_count should always be a multiple of the
cluster ratio so doing a plain bit shift should be enough here. We
avoid using EXT4_B2C() because it's confusing.

As a result of the first problem number of free clusters is much bigger
than it should have been and ext4_has_free_clusters() would return 1 even
if there is really not enough free clusters available.

Fix this by removing the EXT4_C2B() conversion of free clusters and
using bit shift when calculating number of root clusters. This bug
affects number of xfstests tests covering file system ENOSPC situation
handling. With this patch most of the ENOSPC problems with bigalloc file
system disappear, especially the errors caused by delayed allocation not
having enough space when the actual allocation is finally requested.

Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 fs/ext4/balloc.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index 33938c1..2f2e0da 100644
--- a/fs/ext4/balloc.c
+++ b/fs/ext4/balloc.c
@@ -484,11 +484,16 @@ static int ext4_has_free_clusters(struct ext4_sb_info *sbi,
 
 	free_clusters  = percpu_counter_read_positive(fcc);
 	dirty_clusters = percpu_counter_read_positive(dcc);
-	root_clusters = EXT4_B2C(sbi, ext4_r_blocks_count(sbi->s_es));
+
+	/*
+	 * r_blocks_count should always be multiple of the cluster ratio so
+	 * we are safe to do a plane bit shift only.
+	 */
+	root_clusters = ext4_r_blocks_count(sbi->s_es) >> sbi->s_cluster_bits;
 
 	if (free_clusters - (nclusters + root_clusters + dirty_clusters) <
 					EXT4_FREECLUSTERS_WATERMARK) {
-		free_clusters  = EXT4_C2B(sbi, percpu_counter_sum_positive(fcc));
+		free_clusters  = percpu_counter_sum_positive(fcc);
 		dirty_clusters = percpu_counter_sum_positive(dcc);
 	}
 	/* Check whether we have space after accounting for current
-- 
1.8.1.2

[PATCH 115/139] fs: Fix possible use-after-free with AIO

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jan Kara <jack@suse.cz>

commit 54c807e71d5ac59dee56c685f2b66e27cd54c475 upstream.

Running AIO is pinning inode in memory using file reference. Once AIO
is completed using aio_complete(), file reference is put and inode can
be freed from memory. So we have to be sure that calling aio_complete()
is the last thing we do with the inode.

CC: Christoph Hellwig <hch@infradead.org>
CC: Jens Axboe <axboe@kernel.dk>
CC: Jeff Moyer <jmoyer@redhat.com>
Acked-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 fs/direct-io.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/direct-io.c b/fs/direct-io.c
index 0c85fae..84466cb 100644
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -261,9 +261,9 @@ static ssize_t dio_complete(struct dio *dio, loff_t offset, ssize_t ret, bool is
 		dio->end_io(dio->iocb, offset, transferred,
 			    dio->private, ret, is_async);
 	} else {
+		inode_dio_done(dio->inode);
 		if (is_async)
 			aio_complete(dio->iocb, ret, 0);
-		inode_dio_done(dio->inode);
 	}
 
 	return ret;
-- 
1.8.1.2

[PATCH 116/139] mmc: sdhci-esdhc-imx: fix host version read

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Shawn Guo <shawn.guo@linaro.org>

commit ef4d0888bb7e1b963880f086575081c3d39cad2d upstream.

When commit 95a2482 (mmc: sdhci-esdhc-imx: add basic imx6q usdhc
support) works around host version issue on imx6q, it gets the
register address fixup "reg ^= 2" lost for imx25/35/51/53 esdhc.
Thus, the controller version on these SoCs is wrongly identified
as v1 while it's actually v2.

Add the address fixup back and take a different approach to correct
imx6q host version, so that the host version read gets back to work
for all SoCs.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/mmc/host/sdhci-esdhc-imx.c | 19 +++++++++++--------
 1 file changed, 11 insertions(+), 8 deletions(-)

diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
index ebbe984..1dc06a6 100644
--- a/drivers/mmc/host/sdhci-esdhc-imx.c
+++ b/drivers/mmc/host/sdhci-esdhc-imx.c
@@ -237,15 +237,18 @@ static void esdhc_writel_le(struct sdhci_host *host, u32 val, int reg)
 
 static u16 esdhc_readw_le(struct sdhci_host *host, int reg)
 {
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct pltfm_imx_data *imx_data = pltfm_host->priv;
+
 	if (unlikely(reg == SDHCI_HOST_VERSION)) {
-		u16 val = readw(host->ioaddr + (reg ^ 2));
-		/*
-		 * uSDHC supports SDHCI v3.0, but it's encoded as value
-		 * 0x3 in host controller version register, which violates
-		 * SDHCI_SPEC_300 definition.  Work it around here.
-		 */
-		if ((val & SDHCI_SPEC_VER_MASK) == 3)
-			return --val;
+		reg ^= 2;
+		if (is_imx6q_usdhc(imx_data)) {
+			/*
+			 * The usdhc register returns a wrong host version.
+			 * Correct it here.
+			 */
+			return SDHCI_SPEC_300;
+		}
 	}
 
 	return readw(host->ioaddr + reg);
-- 
1.8.1.2

[PATCH 117/139] b43: Fix lockdep splat on module unload

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Larry Finger <Larry.Finger@lwfinger.net>

commit 63a02ce1c5c59baa40b99756492e3ec8d6b51483 upstream.

On unload, b43 produces a lockdep warning that can be summarized in the
following way:

 ======================================================
 [ INFO: possible circular locking dependency detected ]
 3.8.0-wl+ #117 Not tainted
 -------------------------------------------------------
 modprobe/5557 is trying to acquire lock:
  ((&wl->firmware_load)){+.+.+.}, at: [<ffffffff81062160>] flush_work+0x0/0x2a0

 but task is already holding lock:
  (rtnl_mutex){+.+.+.}, at: [<ffffffff813bd7d2>] rtnl_lock+0x12/0x20

 which lock already depends on the new lock.
 [ INFO: possible circular locking dependency detected ]
 ======================================================

The full output is available at http://lkml.indiana.edu/hypermail/linux/kernel/1302.3/00060.html.
To summarize, commit 6b6fa58 added a 'cancel_work_sync(&wl->firmware_load)'
call in the wrong place.

The fix is to move the cancel_work_sync() call to b43_bcma_remove() and
b43_ssb_remove(). Thanks to Johannes Berg and Michael Buesch for help in
diagnosing the log output.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/net/wireless/b43/main.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/b43/main.c b/drivers/net/wireless/b43/main.c
index 823943b..12603b8 100644
--- a/drivers/net/wireless/b43/main.c
+++ b/drivers/net/wireless/b43/main.c
@@ -4208,7 +4208,6 @@ redo:
 	mutex_unlock(&wl->mutex);
 	cancel_delayed_work_sync(&dev->periodic_work);
 	cancel_work_sync(&wl->tx_work);
-	cancel_work_sync(&wl->firmware_load);
 	mutex_lock(&wl->mutex);
 	dev = wl->current_dev;
 	if (!dev || b43_status(dev) < B43_STAT_STARTED) {
@@ -5399,6 +5398,7 @@ static void b43_bcma_remove(struct bcma_device *core)
 	/* We must cancel any work here before unregistering from ieee80211,
 	 * as the ieee80211 unreg will destroy the workqueue. */
 	cancel_work_sync(&wldev->restart_work);
+	cancel_work_sync(&wl->firmware_load);
 
 	B43_WARN_ON(!wl);
 	if (!wldev->fw.ucode.data)
@@ -5475,6 +5475,7 @@ static void b43_ssb_remove(struct ssb_device *sdev)
 	/* We must cancel any work here before unregistering from ieee80211,
 	 * as the ieee80211 unreg will destroy the workqueue. */
 	cancel_work_sync(&wldev->restart_work);
+	cancel_work_sync(&wl->firmware_load);
 
 	B43_WARN_ON(!wl);
 	if (!wldev->fw.ucode.data)
-- 
1.8.1.2

[PATCH 118/139] ocfs2: fix possible use-after-free with AIO

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jan Kara <jack@suse.cz>

commit 9b171e0c74ca0549d0610990a862dd895870f04a upstream.

Running AIO is pinning inode in memory using file reference. Once AIO
is completed using aio_complete(), file reference is put and inode can
be freed from memory. So we have to be sure that calling aio_complete()
is the last thing we do with the inode.

Signed-off-by: Jan Kara <jack@suse.cz>
Acked-by: Jeff Moyer <jmoyer@redhat.com>
Acked-by: Joel Becker <jlbec@evilplan.org>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 fs/ocfs2/aops.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c
index 6577432..340bd02 100644
--- a/fs/ocfs2/aops.c
+++ b/fs/ocfs2/aops.c
@@ -593,9 +593,9 @@ static void ocfs2_dio_end_io(struct kiocb *iocb,
 	level = ocfs2_iocb_rw_locked_level(iocb);
 	ocfs2_rw_unlock(inode, level);
 
+	inode_dio_done(inode);
 	if (is_async)
 		aio_complete(iocb, ret, 0);
-	inode_dio_done(inode);
 }
 
 /*
-- 
1.8.1.2

[PATCH 119/139] x86/xen: don't assume %ds is usable in xen_iret for 32-bit PVOPS.

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jan Beulich <JBeulich@suse.com>

commit 13d2b4d11d69a92574a55bfd985cfb0ca77aebdc upstream.

This fixes CVE-2013-0228 / XSA-42

Drew Jones while working on CVE-2013-0190 found that that unprivileged guest user
in 32bit PV guest can use to crash the > guest with the panic like this:

-------------
general protection fault: 0000 [#1] SMP
last sysfs file: /sys/devices/vbd-51712/block/xvda/dev
Modules linked in: sunrpc ipt_REJECT nf_conntrack_ipv4 nf_defrag_ipv4
iptable_filter ip_tables ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6
xt_state nf_conntrack ip6table_filter ip6_tables ipv6 xen_netfront ext4
mbcache jbd2 xen_blkfront dm_mirror dm_region_hash dm_log dm_mod [last
unloaded: scsi_wait_scan]

Pid: 1250, comm: r Not tainted 2.6.32-356.el6.i686 #1
EIP: 0061:[<c0407462>] EFLAGS: 00010086 CPU: 0
EIP is at xen_iret+0x12/0x2b
EAX: eb8d0000 EBX: 00000001 ECX: 08049860 EDX: 00000010
ESI: 00000000 EDI: 003d0f00 EBP: b77f8388 ESP: eb8d1fe0
 DS: 0000 ES: 007b FS: 0000 GS: 00e0 SS: 0069
Process r (pid: 1250, ti=eb8d0000 task=c2953550 task.ti=eb8d0000)
Stack:
 00000000 0027f416 00000073 00000206 b77f8364 0000007b 00000000 00000000
Call Trace:
Code: c3 8b 44 24 18 81 4c 24 38 00 02 00 00 8d 64 24 30 e9 03 00 00 00
8d 76 00 f7 44 24 08 00 00 02 80 75 33 50 b8 00 e0 ff ff 21 e0 <8b> 40
10 8b 04 85 a0 f6 ab c0 8b 80 0c b0 b3 c0 f6 44 24 0d 02
EIP: [<c0407462>] xen_iret+0x12/0x2b SS:ESP 0069:eb8d1fe0
general protection fault: 0000 [#2]
---[ end trace ab0d29a492dcd330 ]---
Kernel panic - not syncing: Fatal exception
Pid: 1250, comm: r Tainted: G      D    ---------------
2.6.32-356.el6.i686 #1
Call Trace:
 [<c08476df>] ? panic+0x6e/0x122
 [<c084b63c>] ? oops_end+0xbc/0xd0
 [<c084b260>] ? do_general_protection+0x0/0x210
 [<c084a9b7>] ? error_code+0x73/
-------------

Petr says: "
 I've analysed the bug and I think that xen_iret() cannot cope with
 mangled DS, in this case zeroed out (null selector/descriptor) by either
 xen_failsafe_callback() or RESTORE_REGS because the corresponding LDT
 entry was invalidated by the reproducer. "

Jan took a look at the preliminary patch and came up a fix that solves
this problem:

"This code gets called after all registers other than those handled by
IRET got already restored, hence a null selector in %ds or a non-null
one that got loaded from a code or read-only data descriptor would
cause a kernel mode fault (with the potential of crashing the kernel
as a whole, if panic_on_oops is set)."

The way to fix this is to realize that the we can only relay on the
registers that IRET restores. The two that are guaranteed are the
%cs and %ss as they are always fixed GDT selectors. Also they are
inaccessible from user mode - so they cannot be altered. This is
the approach taken in this patch.

Another alternative option suggested by Jan would be to relay on
the subtle realization that using the %ebp or %esp relative references uses
the %ss segment.  In which case we could switch from using %eax to %ebp and
would not need the %ss over-rides. That would also require one extra
instruction to compensate for the one place where the register is used
as scaled index. However Andrew pointed out that is too subtle and if
further work was to be done in this code-path it could escape folks attention
and lead to accidents.

Reviewed-by: Petr Matousek <pmatouse@redhat.com>
Reported-by: Petr Matousek <pmatouse@redhat.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 arch/x86/xen/xen-asm_32.S | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/arch/x86/xen/xen-asm_32.S b/arch/x86/xen/xen-asm_32.S
index f9643fc..33ca6e4 100644
--- a/arch/x86/xen/xen-asm_32.S
+++ b/arch/x86/xen/xen-asm_32.S
@@ -89,11 +89,11 @@ ENTRY(xen_iret)
 	 */
 #ifdef CONFIG_SMP
 	GET_THREAD_INFO(%eax)
-	movl TI_cpu(%eax), %eax
-	movl __per_cpu_offset(,%eax,4), %eax
-	mov xen_vcpu(%eax), %eax
+	movl %ss:TI_cpu(%eax), %eax
+	movl %ss:__per_cpu_offset(,%eax,4), %eax
+	mov %ss:xen_vcpu(%eax), %eax
 #else
-	movl xen_vcpu, %eax
+	movl %ss:xen_vcpu, %eax
 #endif
 
 	/* check IF state we're restoring */
@@ -106,11 +106,11 @@ ENTRY(xen_iret)
 	 * resuming the code, so we don't have to be worried about
 	 * being preempted to another CPU.
 	 */
-	setz XEN_vcpu_info_mask(%eax)
+	setz %ss:XEN_vcpu_info_mask(%eax)
 xen_iret_start_crit:
 
 	/* check for unmasked and pending */
-	cmpw $0x0001, XEN_vcpu_info_pending(%eax)
+	cmpw $0x0001, %ss:XEN_vcpu_info_pending(%eax)
 
 	/*
 	 * If there's something pending, mask events again so we can
@@ -118,7 +118,7 @@ xen_iret_start_crit:
 	 * touch XEN_vcpu_info_mask.
 	 */
 	jne 1f
-	movb $1, XEN_vcpu_info_mask(%eax)
+	movb $1, %ss:XEN_vcpu_info_mask(%eax)
 
 1:	popl %eax
 
-- 
1.8.1.2

[PATCH 120/139] igb: Remove artificial restriction on RQDPC stat reading

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Alexander Duyck <alexander.h.duyck@intel.com>

commit ae1c07a6b7ced6c0c94c99e3b53f4e7856fa8bff upstream.

For some reason the reading of the RQDPC register was being artificially
limited to 4K.  Instead of limiting the value we should read the value and
add the full amount.  Otherwise this can lead to a misleading number of
dropped packets when the actual value is in fact much higher.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Jeff Pieper   <jeffrey.e.pieper@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/net/ethernet/intel/igb/igb_main.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index 64a0f74..9269192 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -4580,11 +4580,13 @@ void igb_update_stats(struct igb_adapter *adapter,
 	bytes = 0;
 	packets = 0;
 	for (i = 0; i < adapter->num_rx_queues; i++) {
-		u32 rqdpc_tmp = rd32(E1000_RQDPC(i)) & 0x0FFF;
+		u32 rqdpc = rd32(E1000_RQDPC(i));
 		struct igb_ring *ring = adapter->rx_ring[i];
 
-		ring->rx_stats.drops += rqdpc_tmp;
-		net_stats->rx_fifo_errors += rqdpc_tmp;
+		if (rqdpc) {
+			ring->rx_stats.drops += rqdpc;
+			net_stats->rx_fifo_errors += rqdpc;
+		}
 
 		do {
 			start = u64_stats_fetch_begin_bh(&ring->rx_syncp);
-- 
1.8.1.2

[PATCH 121/139] ptrace/x86: Introduce set_task_blockstep() helper

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Oleg Nesterov <oleg@redhat.com>

commit 848e8f5f0ad3169560c516fff6471be65f76e69f upstream.

No functional changes, preparation for the next fix and for uprobes
single-step fixes.

Move the code playing with TIF_BLOCKSTEP/DEBUGCTLMSR_BTF into the
new helper, set_task_blockstep().

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 arch/x86/kernel/step.c | 41 +++++++++++++++++++++--------------------
 1 file changed, 21 insertions(+), 20 deletions(-)

diff --git a/arch/x86/kernel/step.c b/arch/x86/kernel/step.c
index c346d11..7a51498 100644
--- a/arch/x86/kernel/step.c
+++ b/arch/x86/kernel/step.c
@@ -157,6 +157,21 @@ static int enable_single_step(struct task_struct *child)
 	return 1;
 }
 
+static void set_task_blockstep(struct task_struct *task, bool on)
+{
+	unsigned long debugctl;
+
+	debugctl = get_debugctlmsr();
+	if (on) {
+		debugctl |= DEBUGCTLMSR_BTF;
+		set_tsk_thread_flag(task, TIF_BLOCKSTEP);
+	} else {
+		debugctl &= ~DEBUGCTLMSR_BTF;
+		clear_tsk_thread_flag(task, TIF_BLOCKSTEP);
+	}
+	update_debugctlmsr(debugctl);
+}
+
 /*
  * Enable single or block step.
  */
@@ -169,19 +184,10 @@ static void enable_step(struct task_struct *child, bool block)
 	 * So no one should try to use debugger block stepping in a program
 	 * that uses user-mode single stepping itself.
 	 */
-	if (enable_single_step(child) && block) {
-		unsigned long debugctl = get_debugctlmsr();
-
-		debugctl |= DEBUGCTLMSR_BTF;
-		update_debugctlmsr(debugctl);
-		set_tsk_thread_flag(child, TIF_BLOCKSTEP);
-	} else if (test_tsk_thread_flag(child, TIF_BLOCKSTEP)) {
-		unsigned long debugctl = get_debugctlmsr();
-
-		debugctl &= ~DEBUGCTLMSR_BTF;
-		update_debugctlmsr(debugctl);
-		clear_tsk_thread_flag(child, TIF_BLOCKSTEP);
-	}
+	if (enable_single_step(child) && block)
+		set_task_blockstep(child, true);
+	else if (test_tsk_thread_flag(child, TIF_BLOCKSTEP))
+		set_task_blockstep(child, false);
 }
 
 void user_enable_single_step(struct task_struct *child)
@@ -199,13 +205,8 @@ void user_disable_single_step(struct task_struct *child)
 	/*
 	 * Make sure block stepping (BTF) is disabled.
 	 */
-	if (test_tsk_thread_flag(child, TIF_BLOCKSTEP)) {
-		unsigned long debugctl = get_debugctlmsr();
-
-		debugctl &= ~DEBUGCTLMSR_BTF;
-		update_debugctlmsr(debugctl);
-		clear_tsk_thread_flag(child, TIF_BLOCKSTEP);
-	}
+	if (test_tsk_thread_flag(child, TIF_BLOCKSTEP))
+		set_task_blockstep(child, false);
 
 	/* Always clear TIF_SINGLESTEP... */
 	clear_tsk_thread_flag(child, TIF_SINGLESTEP);
-- 
1.8.1.2

[PATCH 122/139] ptrace/x86: Partly fix set_task_blockstep()->update_debugctlmsr() logic

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Oleg Nesterov <oleg@redhat.com>

commit 95cf00fa5d5e2a200a2c044c84bde8389a237e02 upstream.

Afaics the usage of update_debugctlmsr() and TIF_BLOCKSTEP in
step.c was always very wrong.

1. update_debugctlmsr() was simply unneeded. The child sleeps
   TASK_TRACED, __switch_to_xtra(next_p => child) should notice
   TIF_BLOCKSTEP and set/clear DEBUGCTLMSR_BTF after resume if
   needed.

2. It is wrong. The state of DEBUGCTLMSR_BTF bit in CPU register
   should always match the state of current's TIF_BLOCKSTEP bit.

3. Even get_debugctlmsr() + update_debugctlmsr() itself does not
   look right. Irq can change other bits in MSR_IA32_DEBUGCTLMSR
   register or the caller can be preempted in between.

4. It is not safe to play with TIF_BLOCKSTEP if task != current.
   DEBUGCTLMSR_BTF and TIF_BLOCKSTEP should always match each
   other if the task is running. The tracee is stopped but it
   can be SIGKILL'ed right before set/clear_tsk_thread_flag().

However, now that uprobes uses user_enable_single_step(current)
we can't simply remove update_debugctlmsr(). So this patch adds
the additional "task == current" check and disables irqs to avoid
the race with interrupts/preemption.

Unfortunately this patch doesn't solve the last problem, we need
another fix. Probably we should teach ptrace_stop() to set/clear
single/block stepping after resume.

And afaics there is yet another problem: perf can play with
MSR_IA32_DEBUGCTLMSR from nmi, this obviously means that even
__switch_to_xtra() has problems.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 arch/x86/kernel/step.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/arch/x86/kernel/step.c b/arch/x86/kernel/step.c
index 7a51498..f89cdc6 100644
--- a/arch/x86/kernel/step.c
+++ b/arch/x86/kernel/step.c
@@ -161,6 +161,16 @@ static void set_task_blockstep(struct task_struct *task, bool on)
 {
 	unsigned long debugctl;
 
+	/*
+	 * Ensure irq/preemption can't change debugctl in between.
+	 * Note also that both TIF_BLOCKSTEP and debugctl should
+	 * be changed atomically wrt preemption.
+	 * FIXME: this means that set/clear TIF_BLOCKSTEP is simply
+	 * wrong if task != current, SIGKILL can wakeup the stopped
+	 * tracee and set/clear can play with the running task, this
+	 * can confuse the next __switch_to_xtra().
+	 */
+	local_irq_disable();
 	debugctl = get_debugctlmsr();
 	if (on) {
 		debugctl |= DEBUGCTLMSR_BTF;
@@ -169,7 +179,9 @@ static void set_task_blockstep(struct task_struct *task, bool on)
 		debugctl &= ~DEBUGCTLMSR_BTF;
 		clear_tsk_thread_flag(task, TIF_BLOCKSTEP);
 	}
-	update_debugctlmsr(debugctl);
+	if (task == current)
+		update_debugctlmsr(debugctl);
+	local_irq_enable();
 }
 
 /*
-- 
1.8.1.2

[PATCH 123/139] sunvdc: Fix off-by-one in generic_request().

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: "David S. Miller" <davem@davemloft.net>

commit f4d9605434c0fd4cc8639bf25cfc043418c52362 upstream.

The 'operations' bitmap corresponds one-for-one with the operation
codes, no adjustment is necessary.

Reported-by: Mark Kettenis <mark.kettenis@xs4all.nl>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/block/sunvdc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/block/sunvdc.c b/drivers/block/sunvdc.c
index 9dcf76a..31dd451 100644
--- a/drivers/block/sunvdc.c
+++ b/drivers/block/sunvdc.c
@@ -461,7 +461,7 @@ static int generic_request(struct vdc_port *port, u8 op, void *buf, int len)
 	int op_len, err;
 	void *req_buf;
 
-	if (!(((u64)1 << ((u64)op - 1)) & port->operations))
+	if (!(((u64)1 << (u64)op) & port->operations))
 		return -EOPNOTSUPP;
 
 	switch (op) {
-- 
1.8.1.2

[PATCH 124/139] sparc64: Fix gfp_flags setting in tsb_grow().

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: "David S. Miller" <davem@davemloft.net>

commit a55ee1ff751f88252207160087d8197bb7538d4c upstream.

We should "|= more_flags" rather than "= more_flags".

Reported-by: David Rientjes <rientjes@google.com>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 arch/sparc/mm/tsb.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/sparc/mm/tsb.c b/arch/sparc/mm/tsb.c
index c52add7..7c2d9ac 100644
--- a/arch/sparc/mm/tsb.c
+++ b/arch/sparc/mm/tsb.c
@@ -331,7 +331,7 @@ void tsb_grow(struct mm_struct *mm, unsigned long tsb_index, unsigned long rss)
 retry_tsb_alloc:
 	gfp_flags = GFP_KERNEL;
 	if (new_size > (PAGE_SIZE * 2))
-		gfp_flags = __GFP_NOWARN | __GFP_NORETRY;
+		gfp_flags |= __GFP_NOWARN | __GFP_NORETRY;
 
 	new_tsb = kmem_cache_alloc_node(tsb_caches[new_cache_index],
 					gfp_flags, numa_node_id());
-- 
1.8.1.2

[PATCH 125/139] xen-pciback: rate limit error messages from xen_pcibk_enable_msi{,x}()

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jan Beulich <jbeulich@suse.com>

commit 51ac8893a7a51b196501164e645583bf78138699 upstream.

... as being guest triggerable (e.g. by invoking
XEN_PCI_OP_enable_msi{,x} on a device not being MSI/MSI-X capable).

This is CVE-2013-0231 / XSA-43.

Also make the two messages uniform in both their wording and severity.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/xen/xen-pciback/pciback_ops.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/xen/xen-pciback/pciback_ops.c b/drivers/xen/xen-pciback/pciback_ops.c
index 97f5d26..37c1f82 100644
--- a/drivers/xen/xen-pciback/pciback_ops.c
+++ b/drivers/xen/xen-pciback/pciback_ops.c
@@ -135,7 +135,6 @@ int xen_pcibk_enable_msi(struct xen_pcibk_device *pdev,
 			 struct pci_dev *dev, struct xen_pci_op *op)
 {
 	struct xen_pcibk_dev_data *dev_data;
-	int otherend = pdev->xdev->otherend_id;
 	int status;
 
 	if (unlikely(verbose_request))
@@ -144,8 +143,9 @@ int xen_pcibk_enable_msi(struct xen_pcibk_device *pdev,
 	status = pci_enable_msi(dev);
 
 	if (status) {
-		printk(KERN_ERR "error enable msi for guest %x status %x\n",
-			otherend, status);
+		pr_warn_ratelimited(DRV_NAME ": %s: error enabling MSI for guest %u: err %d\n",
+				    pci_name(dev), pdev->xdev->otherend_id,
+				    status);
 		op->value = 0;
 		return XEN_PCI_ERR_op_failed;
 	}
@@ -223,10 +223,10 @@ int xen_pcibk_enable_msix(struct xen_pcibk_device *pdev,
 						pci_name(dev), i,
 						op->msix_entries[i].vector);
 		}
-	} else {
-		printk(KERN_WARNING DRV_NAME ": %s: failed to enable MSI-X: err %d!\n",
-			pci_name(dev), result);
-	}
+	} else
+		pr_warn_ratelimited(DRV_NAME ": %s: error enabling MSI-X for guest %u: err %d!\n",
+				    pci_name(dev), pdev->xdev->otherend_id,
+				    result);
 	kfree(entries);
 
 	op->value = result;
-- 
1.8.1.2

[PATCH 126/139] bridge: set priority of STP packets

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Stephen Hemminger <stephen@networkplumber.org>

commit 547b4e718115eea74087e28d7fa70aec619200db upstream.

Spanning Tree Protocol packets should have always been marked as
control packets, this causes them to get queued in the high prirority
FIFO. As Radia Perlman mentioned in her LCA talk, STP dies if bridge
gets overloaded and can't communicate. This is a long-standing bug back
to the first versions of Linux bridge.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 net/bridge/br_stp_bpdu.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/bridge/br_stp_bpdu.c b/net/bridge/br_stp_bpdu.c
index fd30a60..a8aa2d5 100644
--- a/net/bridge/br_stp_bpdu.c
+++ b/net/bridge/br_stp_bpdu.c
@@ -16,6 +16,7 @@
 #include <linux/etherdevice.h>
 #include <linux/llc.h>
 #include <linux/slab.h>
+#include <linux/pkt_sched.h>
 #include <net/net_namespace.h>
 #include <net/llc.h>
 #include <net/llc_pdu.h>
@@ -40,6 +41,7 @@ static void br_send_bpdu(struct net_bridge_port *p,
 
 	skb->dev = p->dev;
 	skb->protocol = htons(ETH_P_802_2);
+	skb->priority = TC_PRIO_CONTROL;
 
 	skb_reserve(skb, LLC_RESERVE);
 	memcpy(__skb_put(skb, length), data, length);
-- 
1.8.1.2

[PATCH 127/139] xen-netback: correctly return errors from netbk_count_requests()

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: David Vrabel <david.vrabel@citrix.com>

commit 35876b5ffc154c357476b2c3bdab10feaf4bd8f0 upstream.

netbk_count_requests() could detect an error, call
netbk_fatal_tx_error() but return 0.  The vif may then be used
afterwards (e.g., in a call to netbk_tx_error().

Since netbk_fatal_tx_error() could set vif->refcnt to 1, the vif may
be freed immediately after the call to netbk_fatal_tx_error() (e.g.,
if the vif is also removed).

Netback thread              Xenwatch thread
-------------------------------------------
netbk_fatal_tx_err()        netback_remove()
                              xenvif_disconnect()
                                ...
                                free_netdev()
netbk_tx_err() Oops!

Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Signed-off-by: Jan Beulich <JBeulich@suse.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Reported-by: Christopher S. Aker <caker@theshore.net>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/net/xen-netback/netback.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/net/xen-netback/netback.c b/drivers/net/xen-netback/netback.c
index f3c3a68..a98f012 100644
--- a/drivers/net/xen-netback/netback.c
+++ b/drivers/net/xen-netback/netback.c
@@ -882,13 +882,13 @@ static int netbk_count_requests(struct xenvif *vif,
 		if (frags >= work_to_do) {
 			netdev_err(vif->dev, "Need more frags\n");
 			netbk_fatal_tx_err(vif);
-			return -frags;
+			return -ENODATA;
 		}
 
 		if (unlikely(frags >= MAX_SKB_FRAGS)) {
 			netdev_err(vif->dev, "Too many frags\n");
 			netbk_fatal_tx_err(vif);
-			return -frags;
+			return -E2BIG;
 		}
 
 		memcpy(txp, RING_GET_REQUEST(&vif->tx, cons + frags),
@@ -896,7 +896,7 @@ static int netbk_count_requests(struct xenvif *vif,
 		if (txp->size > first->size) {
 			netdev_err(vif->dev, "Frag is bigger than frame.\n");
 			netbk_fatal_tx_err(vif);
-			return -frags;
+			return -EIO;
 		}
 
 		first->size -= txp->size;
@@ -906,7 +906,7 @@ static int netbk_count_requests(struct xenvif *vif,
 			netdev_err(vif->dev, "txp->offset: %x, size: %u\n",
 				 txp->offset, txp->size);
 			netbk_fatal_tx_err(vif);
-			return -frags;
+			return -EINVAL;
 		}
 	} while ((txp++)->flags & XEN_NETTXF_more_data);
 	return frags;
-- 
1.8.1.2

[PATCH 128/139] xen-netback: cancel the credit timer when taking the vif down

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: David Vrabel <david.vrabel@citrix.com>

commit 3e55f8b306cf305832a4ac78aa82e1b40e818ece upstream.

If the credit timer is left armed after calling
xen_netbk_remove_xenvif(), then it may fire and attempt to schedule
the vif which will then oops as vif->netbk == NULL.

This may happen both in the fatal error path and during normal
disconnection from the front end.

The sequencing during shutdown is critical to ensure that: a)
vif->netbk doesn't become unexpectedly NULL; and b) the net device/vif
is not freed.

1. Mark as unschedulable (netif_carrier_off()).
2. Synchronously cancel the timer.
3. Remove the vif from the schedule list.
4. Remove it from it netback thread group.
5. Wait for vif->refcnt to become 0.

Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Reported-by: Christopher S. Aker <caker@theshore.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/net/xen-netback/interface.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/net/xen-netback/interface.c b/drivers/net/xen-netback/interface.c
index b8c5193..221f426 100644
--- a/drivers/net/xen-netback/interface.c
+++ b/drivers/net/xen-netback/interface.c
@@ -132,6 +132,7 @@ static void xenvif_up(struct xenvif *vif)
 static void xenvif_down(struct xenvif *vif)
 {
 	disable_irq(vif->irq);
+	del_timer_sync(&vif->credit_timeout);
 	xen_netbk_deschedule_xenvif(vif);
 	xen_netbk_remove_xenvif(vif);
 }
@@ -363,8 +364,6 @@ void xenvif_disconnect(struct xenvif *vif)
 	atomic_dec(&vif->refcnt);
 	wait_event(vif->waiting_to_free, atomic_read(&vif->refcnt) == 0);
 
-	del_timer_sync(&vif->credit_timeout);
-
 	if (vif->irq)
 		unbind_from_irqhandler(vif->irq, vif);
 
-- 
1.8.1.2

[PATCH 129/139] net: fix a compile error when SOCK_REFCNT_DEBUG is enabled

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Ying Xue <ying.xue@windriver.com>

commit dec34fb0f5b7873de45132a84a3af29e61084a6b upstream.

When SOCK_REFCNT_DEBUG is enabled, below build error is met:

kernel/sysctl_binary.o: In function `sk_refcnt_debug_release':
include/net/sock.h:1025: multiple definition of `sk_refcnt_debug_release'
kernel/sysctl.o:include/net/sock.h:1025: first defined here
kernel/audit.o: In function `sk_refcnt_debug_release':
include/net/sock.h:1025: multiple definition of `sk_refcnt_debug_release'
kernel/sysctl.o:include/net/sock.h:1025: first defined here
make[1]: *** [kernel/built-in.o] Error 1
make: *** [kernel] Error 2

So we decide to make sk_refcnt_debug_release static to eliminate
the error.

Signed-off-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 include/net/sock.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/net/sock.h b/include/net/sock.h
index 5de6557..5e904e6 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -979,7 +979,7 @@ static inline void sk_refcnt_debug_dec(struct sock *sk)
 	       sk->sk_prot->name, sk, atomic_read(&sk->sk_prot->socks));
 }
 
-inline void sk_refcnt_debug_release(const struct sock *sk)
+static inline void sk_refcnt_debug_release(const struct sock *sk)
 {
 	if (atomic_read(&sk->sk_refcnt) != 1)
 		printk(KERN_DEBUG "Destruction of the %s socket %p delayed, refcnt=%d\n",
-- 
1.8.1.2

[PATCH 130/139] ipv4: fix a bug in ping_err().

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Li Wei <lw@cn.fujitsu.com>

commit b531ed61a2a2a77eeb2f7c88b49aa5ec7d9880d8 upstream.

We should get 'type' and 'code' from the outer ICMP header.

Signed-off-by: Li Wei <lw@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 net/ipv4/ping.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/ipv4/ping.c b/net/ipv4/ping.c
index 2c00e8b..79db4e5 100644
--- a/net/ipv4/ping.c
+++ b/net/ipv4/ping.c
@@ -328,8 +328,8 @@ void ping_err(struct sk_buff *skb, u32 info)
 	struct iphdr *iph = (struct iphdr *)skb->data;
 	struct icmphdr *icmph = (struct icmphdr *)(skb->data+(iph->ihl<<2));
 	struct inet_sock *inet_sock;
-	int type = icmph->type;
-	int code = icmph->code;
+	int type = icmp_hdr(skb)->type;
+	int code = icmp_hdr(skb)->code;
 	struct net *net = dev_net(skb->dev);
 	struct sock *sk;
 	int harderr;
-- 
1.8.1.2

[PATCH 131/139] ipv6: use a stronger hash for tcp

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Eric Dumazet <edumazet@google.com>

commit 08dcdbf6a7b9d14c2302c5bd0c5390ddf122f664 upstream.

It looks like its possible to open thousands of TCP IPv6
sessions on a server, all landing in a single slot of TCP hash
table. Incoming packets have to lookup sockets in a very
long list.

We should hash all bits from foreign IPv6 addresses, using
a salt and hash mix, not a simple XOR.

inet6_ehashfn() can also separately use the ports, instead
of xoring them.

Reported-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Yuchung Cheng <ycheng@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 include/net/inet6_hashtables.h |  8 ++++----
 include/net/inet_sock.h        |  1 +
 include/net/ipv6.h             | 12 ++++++++++++
 net/ipv4/af_inet.c             |  9 +++++++--
 4 files changed, 24 insertions(+), 6 deletions(-)

diff --git a/include/net/inet6_hashtables.h b/include/net/inet6_hashtables.h
index 00cbb43..2da45ce 100644
--- a/include/net/inet6_hashtables.h
+++ b/include/net/inet6_hashtables.h
@@ -28,16 +28,16 @@
 
 struct inet_hashinfo;
 
-/* I have no idea if this is a good hash for v6 or not. -DaveM */
 static inline unsigned int inet6_ehashfn(struct net *net,
 				const struct in6_addr *laddr, const u16 lport,
 				const struct in6_addr *faddr, const __be16 fport)
 {
-	u32 ports = (lport ^ (__force u16)fport);
+	u32 ports = (((u32)lport) << 16) | (__force u32)fport;
 
 	return jhash_3words((__force u32)laddr->s6_addr32[3],
-			    (__force u32)faddr->s6_addr32[3],
-			    ports, inet_ehash_secret + net_hash_mix(net));
+			    ipv6_addr_jhash(faddr),
+			    ports,
+			    inet_ehash_secret + net_hash_mix(net));
 }
 
 static inline int inet6_sk_ehashfn(const struct sock *sk)
diff --git a/include/net/inet_sock.h b/include/net/inet_sock.h
index ae17e13..8cd2e1d 100644
--- a/include/net/inet_sock.h
+++ b/include/net/inet_sock.h
@@ -202,6 +202,7 @@ static inline void inet_sk_copy_descendant(struct sock *sk_to,
 extern int inet_sk_rebuild_header(struct sock *sk);
 
 extern u32 inet_ehash_secret;
+extern u32 ipv6_hash_secret;
 extern void build_ehash_secret(void);
 
 static inline unsigned int inet_ehashfn(struct net *net,
diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index aecf884..c11fa5d 100644
--- a/include/net/ipv6.h
+++ b/include/net/ipv6.h
@@ -15,6 +15,7 @@
 
 #include <linux/ipv6.h>
 #include <linux/hardirq.h>
+#include <linux/jhash.h>
 #include <net/if_inet6.h>
 #include <net/ndisc.h>
 #include <net/flow.h>
@@ -395,6 +396,17 @@ static inline bool ipv6_addr_any(const struct in6_addr *a)
 		a->s6_addr32[2] | a->s6_addr32[3]) == 0;
 }
 
+/* more secured version of ipv6_addr_hash() */
+static inline u32 ipv6_addr_jhash(const struct in6_addr *a)
+{
+	u32 v = (__force u32)a->s6_addr32[0] ^ (__force u32)a->s6_addr32[1];
+
+	return jhash_3words(v,
+			    (__force u32)a->s6_addr32[2],
+			    (__force u32)a->s6_addr32[3],
+			    ipv6_hash_secret);
+}
+
 static inline bool ipv6_addr_loopback(const struct in6_addr *a)
 {
 	return (a->s6_addr32[0] | a->s6_addr32[1] |
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index c8f7aee..57b3024 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -227,8 +227,12 @@ EXPORT_SYMBOL(inet_listen);
 u32 inet_ehash_secret __read_mostly;
 EXPORT_SYMBOL(inet_ehash_secret);
 
+u32 ipv6_hash_secret __read_mostly;
+EXPORT_SYMBOL(ipv6_hash_secret);
+
 /*
- * inet_ehash_secret must be set exactly once
+ * inet_ehash_secret must be set exactly once, and to a non nul value
+ * ipv6_hash_secret must be set exactly once.
  */
 void build_ehash_secret(void)
 {
@@ -238,7 +242,8 @@ void build_ehash_secret(void)
 		get_random_bytes(&rnd, sizeof(rnd));
 	} while (rnd == 0);
 
-	cmpxchg(&inet_ehash_secret, 0, rnd);
+	if (cmpxchg(&inet_ehash_secret, 0, rnd) == 0)
+		get_random_bytes(&ipv6_hash_secret, sizeof(ipv6_hash_secret));
 }
 EXPORT_SYMBOL(build_ehash_secret);
 
-- 
1.8.1.2

[PATCH 132/139] sock_diag: Fix out-of-bounds access to sock_diag_handlers[]

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Mathias Krause <minipli@googlemail.com>

commit 6e601a53566d84e1ffd25e7b6fe0b6894ffd79c0 upstream.

Userland can send a netlink message requesting SOCK_DIAG_BY_FAMILY
with a family greater or equal then AF_MAX -- the array size of
sock_diag_handlers[]. The current code does not test for this
condition therefore is vulnerable to an out-of-bound access opening
doors for a privilege escalation.

Signed-off-by: Mathias Krause <minipli@googlemail.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 net/core/sock_diag.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/net/core/sock_diag.c b/net/core/sock_diag.c
index 5fd1467..964a92c 100644
--- a/net/core/sock_diag.c
+++ b/net/core/sock_diag.c
@@ -126,6 +126,9 @@ static int __sock_diag_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
 	if (nlmsg_len(nlh) < sizeof(*req))
 		return -EINVAL;
 
+	if (req->sdiag_family >= AF_MAX)
+		return -EINVAL;
+
 	hndl = sock_diag_lock_handler(req->sdiag_family);
 	if (hndl == NULL)
 		err = -ENOENT;
-- 
1.8.1.2

[PATCH 133/139] ARM: 7635/1: versatile: fix the PCI IRQ regression

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Linus Walleij <linus.walleij@linaro.org>

commit e3e92a7be6936dff1de80e66b0b683d54e9e02d8 upstream.

The PCI IRQs were regressing due to two things:

- The PCI glue layer was using an hard-coded IRQ 27 offset.
  This caused the immediate regression.

- The SIC IRQ mask was inverted (i.e. a bit was indeed set to
  one for each valid IRQ on the SIC, but accidentally inverted
  in the init call). This has been around forever, but we have
  been saved by some other forgiving code that would reserve
  IRQ descriptors in this range, as the versatile is
  non-sparse.

When the IRQs were bumped up 32 steps so as to avoid using IRQ
zero and avoid touching the 16 legacy IRQs, things broke.

Introduce an explicit valid mask for the IRQs that are active
on the PIC/SIC, and pass that. Use the BIT() macro from
<linux/bitops.h> to make sure we hit the right bits, readily
defined in <mach/platform.h>.

Reported-by: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 arch/arm/mach-versatile/core.c | 15 ++++++++++++++-
 arch/arm/mach-versatile/pci.c  | 11 ++++++-----
 2 files changed, 20 insertions(+), 6 deletions(-)

diff --git a/arch/arm/mach-versatile/core.c b/arch/arm/mach-versatile/core.c
index cd8ea35..88070ab 100644
--- a/arch/arm/mach-versatile/core.c
+++ b/arch/arm/mach-versatile/core.c
@@ -35,6 +35,7 @@
 #include <linux/gfp.h>
 #include <linux/clkdev.h>
 #include <linux/mtd/physmap.h>
+#include <linux/bitops.h>
 
 #include <asm/irq.h>
 #include <asm/leds.h>
@@ -66,16 +67,28 @@
 #define VA_VIC_BASE		__io_address(VERSATILE_VIC_BASE)
 #define VA_SIC_BASE		__io_address(VERSATILE_SIC_BASE)
 
+/* These PIC IRQs are valid in each configuration */
+#define PIC_VALID_ALL	BIT(SIC_INT_KMI0) | BIT(SIC_INT_KMI1) | \
+			BIT(SIC_INT_SCI3) | BIT(SIC_INT_UART3) | \
+			BIT(SIC_INT_CLCD) | BIT(SIC_INT_TOUCH) | \
+			BIT(SIC_INT_KEYPAD) | BIT(SIC_INT_DoC) | \
+			BIT(SIC_INT_USB) | BIT(SIC_INT_PCI0) | \
+			BIT(SIC_INT_PCI1) | BIT(SIC_INT_PCI2) | \
+			BIT(SIC_INT_PCI3)
 #if 1
 #define IRQ_MMCI0A	IRQ_VICSOURCE22
 #define IRQ_AACI	IRQ_VICSOURCE24
 #define IRQ_ETH		IRQ_VICSOURCE25
 #define PIC_MASK	0xFFD00000
+#define PIC_VALID	PIC_VALID_ALL
 #else
 #define IRQ_MMCI0A	IRQ_SIC_MMCI0A
 #define IRQ_AACI	IRQ_SIC_AACI
 #define IRQ_ETH		IRQ_SIC_ETH
 #define PIC_MASK	0
+#define PIC_VALID	PIC_VALID_ALL | BIT(SIC_INT_MMCI0A) | \
+			BIT(SIC_INT_MMCI1A) | BIT(SIC_INT_AACI) | \
+			BIT(SIC_INT_ETH)
 #endif
 
 /* Lookup table for finding a DT node that represents the vic instance */
@@ -103,7 +116,7 @@ void __init versatile_init_irq(void)
 					      VERSATILE_SIC_BASE);
 
 	fpga_irq_init(VA_SIC_BASE, "SIC", IRQ_SIC_START,
-		IRQ_VICSOURCE31, ~PIC_MASK, np);
+		IRQ_VICSOURCE31, PIC_VALID, np);
 
 	/*
 	 * Interrupts on secondary controller from 0 to 8 are routed to
diff --git a/arch/arm/mach-versatile/pci.c b/arch/arm/mach-versatile/pci.c
index e95bf84..af94887 100644
--- a/arch/arm/mach-versatile/pci.c
+++ b/arch/arm/mach-versatile/pci.c
@@ -23,6 +23,7 @@
 #include <linux/io.h>
 
 #include <mach/hardware.h>
+#include <mach/irqs.h>
 #include <asm/irq.h>
 #include <asm/mach/pci.h>
 
@@ -341,12 +342,12 @@ static int __init versatile_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
 	int irq;
 
 	/* slot,  pin,	irq
-	 *  24     1     27
-	 *  25     1     28
-	 *  26     1     29
-	 *  27     1     30
+	 *  24     1     IRQ_SIC_PCI0
+	 *  25     1     IRQ_SIC_PCI1
+	 *  26     1     IRQ_SIC_PCI2
+	 *  27     1     IRQ_SIC_PCI3
 	 */
-	irq = 27 + ((slot - 24 + pin - 1) & 3);
+	irq = IRQ_SIC_PCI0 + ((slot - 24 + pin - 1) & 3);
 
 	return irq;
 }
-- 
1.8.1.2

[PATCH 134/139] net: fix infinite loop in __skb_recv_datagram()

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Eric Dumazet <edumazet@google.com>

commit 77c1090f94d1b0b5186fb13a1b71b47b1343f87f upstream.

Tommi was fuzzing with trinity and reported the following problem :

commit 3f518bf745 (datagram: Add offset argument to __skb_recv_datagram)
missed that a raw socket receive queue can contain skbs with no payload.

We can loop in __skb_recv_datagram() with MSG_PEEK mode, because
wait_for_packet() is not prepared to skip these skbs.

[   83.541011] INFO: rcu_sched detected stalls on CPUs/tasks: {}
(detected by 0, t=26002 jiffies, g=27673, c=27672, q=75)
[   83.541011] INFO: Stall ended before state dump start
[  108.067010] BUG: soft lockup - CPU#0 stuck for 22s! [trinity-child31:2847]
...
[  108.067010] Call Trace:
[  108.067010]  [<ffffffff818cc103>] __skb_recv_datagram+0x1a3/0x3b0
[  108.067010]  [<ffffffff818cc33d>] skb_recv_datagram+0x2d/0x30
[  108.067010]  [<ffffffff819ed43d>] rawv6_recvmsg+0xad/0x240
[  108.067010]  [<ffffffff818c4b04>] sock_common_recvmsg+0x34/0x50
[  108.067010]  [<ffffffff818bc8ec>] sock_recvmsg+0xbc/0xf0
[  108.067010]  [<ffffffff818bf31e>] sys_recvfrom+0xde/0x150
[  108.067010]  [<ffffffff81ca4329>] system_call_fastpath+0x16/0x1b

Reported-by: Tommi Rantala <tt.rantala@gmail.com>
Tested-by: Tommi Rantala <tt.rantala@gmail.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Pavel Emelyanov <xemul@parallels.com>
Acked-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 net/core/datagram.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/core/datagram.c b/net/core/datagram.c
index ae6acf6..064151a 100644
--- a/net/core/datagram.c
+++ b/net/core/datagram.c
@@ -187,7 +187,7 @@ struct sk_buff *__skb_recv_datagram(struct sock *sk, unsigned int flags,
 		skb_queue_walk(queue, skb) {
 			*peeked = skb->peeked;
 			if (flags & MSG_PEEK) {
-				if (*off >= skb->len) {
+				if (*off >= skb->len && skb->len) {
 					*off -= skb->len;
 					continue;
 				}
-- 
1.8.1.2

[PATCH 135/139] staging: vt6656: Fix URB submitted while active warning.

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Malcolm Priestley <tvboxspy@gmail.com>

commit ae5943de8c8c4438cbac5cda599ff0b88c224468 upstream.

This error happens because PIPEnsControlOut and PIPEnsControlIn unlock the
spin lock for delay, letting in another thread.

The patch moves the current MP_SET_FLAG to before filling
of sUsbCtlRequest for pControlURB and clears it in event of failing.

Any thread calling either function while fMP_CONTROL_READS or fMP_CONTROL_WRITES
flags set will return STATUS_FAILURE.

Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/staging/vt6656/usbpipe.c | 28 ++++++++++++++++++++--------
 1 file changed, 20 insertions(+), 8 deletions(-)

diff --git a/drivers/staging/vt6656/usbpipe.c b/drivers/staging/vt6656/usbpipe.c
index c612ab5..f759352 100644
--- a/drivers/staging/vt6656/usbpipe.c
+++ b/drivers/staging/vt6656/usbpipe.c
@@ -168,6 +168,11 @@ int PIPEnsControlOut(
     if (pDevice->Flags & fMP_CONTROL_WRITES)
         return STATUS_FAILURE;
 
+	if (pDevice->Flags & fMP_CONTROL_READS)
+		return STATUS_FAILURE;
+
+	MP_SET_FLAG(pDevice, fMP_CONTROL_WRITES);
+
 	pDevice->sUsbCtlRequest.bRequestType = 0x40;
 	pDevice->sUsbCtlRequest.bRequest = byRequest;
 	pDevice->sUsbCtlRequest.wValue = cpu_to_le16p(&wValue);
@@ -182,12 +187,13 @@ int PIPEnsControlOut(
 
 	ntStatus = usb_submit_urb(pDevice->pControlURB, GFP_ATOMIC);
 	if (ntStatus != 0) {
-		DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"control send request submission failed: %d\n", ntStatus);
+		DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO
+			"control send request submission failed: %d\n",
+				ntStatus);
+		MP_CLEAR_FLAG(pDevice, fMP_CONTROL_WRITES);
 		return STATUS_FAILURE;
 	}
-	else {
-	    MP_SET_FLAG(pDevice, fMP_CONTROL_WRITES);
-	}
+
 	spin_unlock_irq(&pDevice->lock);
     for (ii = 0; ii <= USB_CTL_WAIT; ii ++) {
 
@@ -227,6 +233,11 @@ int PIPEnsControlIn(
     if (pDevice->Flags & fMP_CONTROL_READS)
 	return STATUS_FAILURE;
 
+	if (pDevice->Flags & fMP_CONTROL_WRITES)
+		return STATUS_FAILURE;
+
+	MP_SET_FLAG(pDevice, fMP_CONTROL_READS);
+
 	pDevice->sUsbCtlRequest.bRequestType = 0xC0;
 	pDevice->sUsbCtlRequest.bRequest = byRequest;
 	pDevice->sUsbCtlRequest.wValue = cpu_to_le16p(&wValue);
@@ -240,10 +251,11 @@ int PIPEnsControlIn(
 
 	ntStatus = usb_submit_urb(pDevice->pControlURB, GFP_ATOMIC);
 	if (ntStatus != 0) {
-		DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"control request submission failed: %d\n", ntStatus);
-	}else {
-		MP_SET_FLAG(pDevice, fMP_CONTROL_READS);
-    }
+		DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO
+			"control request submission failed: %d\n", ntStatus);
+		MP_CLEAR_FLAG(pDevice, fMP_CONTROL_READS);
+		return STATUS_FAILURE;
+	}
 
 	spin_unlock_irq(&pDevice->lock);
     for (ii = 0; ii <= USB_CTL_WAIT; ii ++) {
-- 
1.8.1.2

[PATCH 136/139] vlan: adjust vlan_set_encap_proto() for its callers

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Cong Wang <amwang@redhat.com>

commit da8c87241c26aac81a64c7e4d21d438a33018f4e upstream.

There are two places to call vlan_set_encap_proto():
vlan_untag() and __pop_vlan_tci().

vlan_untag() assumes skb->data points after mac addr, otherwise
the following code

        vhdr = (struct vlan_hdr *) skb->data;
        vlan_tci = ntohs(vhdr->h_vlan_TCI);
        __vlan_hwaccel_put_tag(skb, vlan_tci);

        skb_pull_rcsum(skb, VLAN_HLEN);

won't be correct. But __pop_vlan_tci() assumes points _before_
mac addr.

In vlan_set_encap_proto(), it looks for some magic L2 value
after mac addr:

        rawp = skb->data;
        if (*(unsigned short *) rawp == 0xFFFF)
	...

Therefore __pop_vlan_tci() is obviously wrong.

A quick fix is avoiding using skb->data in vlan_set_encap_proto(),
use 'vhdr+1' is always correct in both cases.

Cc: David S. Miller <davem@davemloft.net>
Cc: Jesse Gross <jesse@nicira.com>
Signed-off-by: Cong Wang <amwang@redhat.com>
Acked-by: Jesse Gross <jesse@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 include/linux/if_vlan.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/include/linux/if_vlan.h b/include/linux/if_vlan.h
index 561e130..9b0c614 100644
--- a/include/linux/if_vlan.h
+++ b/include/linux/if_vlan.h
@@ -327,7 +327,7 @@ static inline void vlan_set_encap_proto(struct sk_buff *skb,
 					struct vlan_hdr *vhdr)
 {
 	__be16 proto;
-	unsigned char *rawp;
+	unsigned short *rawp;
 
 	/*
 	 * Was a VLAN packet, grab the encapsulated protocol, which the layer
@@ -340,8 +340,8 @@ static inline void vlan_set_encap_proto(struct sk_buff *skb,
 		return;
 	}
 
-	rawp = skb->data;
-	if (*(unsigned short *) rawp == 0xFFFF)
+	rawp = (unsigned short *)(vhdr + 1);
+	if (*rawp == 0xFFFF)
 		/*
 		 * This is a magic hack to spot IPX packets. Older Novell
 		 * breaks the protocol design and runs IPX over 802.3 without
-- 
1.8.1.2

[PATCH 137/139] gpio/ich: Add missing spinlock init

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jean Delvare <khali@linux-fr.org>

commit d39a948fef2446cfac3749bbfcfdd536335c3764 upstream.

As reported by CONFIG_DEBUG_SPINLOCK=y.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Peter Tyser <ptyser@xes-inc.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/gpio/gpio-ich.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpio/gpio-ich.c b/drivers/gpio/gpio-ich.c
index b7c0651..230814d 100644
--- a/drivers/gpio/gpio-ich.c
+++ b/drivers/gpio/gpio-ich.c
@@ -328,6 +328,7 @@ static int __devinit ichx_gpio_probe(struct platform_device *pdev)
 		return -ENODEV;
 	}
 
+	spin_lock_init(&ichx_priv.lock);
 	res_base = platform_get_resource(pdev, IORESOURCE_IO, ICH_RES_GPIO);
 	if (!res_base || !res_base->start || !res_base->end)
 		return -ENODEV;
-- 
1.8.1.2

[PATCH 138/139] staging: comedi: ni_labpc: set up command4 register *after* command3

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Ian Abbott <abbotti@mev.co.uk>

Commit 22056e2b46246d97ff0f7c6e21a77b8daa07f02c upstream.

Tuomas <tvainikk _at_ gmail _dot_ com> reported problems getting
meaningful output from a Lab-PC+ in differential mode for AI cmds, but
AI insn reads gave correct readings.  He tracked it down to two
problems, one of which is addressed by this patch.

It seems that writing to the command3 register after writing to the
command4 register in `labpc_ai_cmd()` messes up the differential
reference bit setting in the command4 register.  Set up the command4
register after the command3 register (as in `labpc_ai_rinsn()`) to avoid
the problem.

Thanks to Tuomas for suggesting the fix.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/staging/comedi/drivers/ni_labpc.c | 31 ++++++++++++++++---------------
 1 file changed, 16 insertions(+), 15 deletions(-)

diff --git a/drivers/staging/comedi/drivers/ni_labpc.c b/drivers/staging/comedi/drivers/ni_labpc.c
index 5334977..5b2b966 100644
--- a/drivers/staging/comedi/drivers/ni_labpc.c
+++ b/drivers/staging/comedi/drivers/ni_labpc.c
@@ -1275,21 +1275,6 @@ static int labpc_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
 		devpriv->write_byte(devpriv->command1_bits,
 				    dev->iobase + COMMAND1_REG);
 	}
-	/*  setup any external triggering/pacing (command4 register) */
-	devpriv->command4_bits = 0;
-	if (cmd->convert_src != TRIG_EXT)
-		devpriv->command4_bits |= EXT_CONVERT_DISABLE_BIT;
-	/* XXX should discard first scan when using interval scanning
-	 * since manual says it is not synced with scan clock */
-	if (labpc_use_continuous_mode(cmd) == 0) {
-		devpriv->command4_bits |= INTERVAL_SCAN_EN_BIT;
-		if (cmd->scan_begin_src == TRIG_EXT)
-			devpriv->command4_bits |= EXT_SCAN_EN_BIT;
-	}
-	/*  single-ended/differential */
-	if (aref == AREF_DIFF)
-		devpriv->command4_bits |= ADC_DIFF_BIT;
-	devpriv->write_byte(devpriv->command4_bits, dev->iobase + COMMAND4_REG);
 
 	devpriv->write_byte(cmd->chanlist_len,
 			    dev->iobase + INTERVAL_COUNT_REG);
@@ -1369,6 +1354,22 @@ static int labpc_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
 		devpriv->command3_bits &= ~ADC_FNE_INTR_EN_BIT;
 	devpriv->write_byte(devpriv->command3_bits, dev->iobase + COMMAND3_REG);
 
+	/*  setup any external triggering/pacing (command4 register) */
+	devpriv->command4_bits = 0;
+	if (cmd->convert_src != TRIG_EXT)
+		devpriv->command4_bits |= EXT_CONVERT_DISABLE_BIT;
+	/* XXX should discard first scan when using interval scanning
+	 * since manual says it is not synced with scan clock */
+	if (labpc_use_continuous_mode(cmd) == 0) {
+		devpriv->command4_bits |= INTERVAL_SCAN_EN_BIT;
+		if (cmd->scan_begin_src == TRIG_EXT)
+			devpriv->command4_bits |= EXT_SCAN_EN_BIT;
+	}
+	/*  single-ended/differential */
+	if (aref == AREF_DIFF)
+		devpriv->command4_bits |= ADC_DIFF_BIT;
+	devpriv->write_byte(devpriv->command4_bits, dev->iobase + COMMAND4_REG);
+
 	/*  startup acquisition */
 
 	/*  command2 reg */
-- 
1.8.1.2

[PATCH 139/139] staging: comedi: ni_labpc: correct differential channel sequence for AI commands

[Luis Henriques]

3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Ian Abbott <abbotti@mev.co.uk>

Commit 4c4bc25d0fa6beaf054c0b4c3b324487f266c820 upstream.

Tuomas <tvainikk _at_ gmail _dot_ com> reported problems getting
meaningful output from a Lab-PC+ in differential mode for AI cmds, but
AI insn reads gave correct readings.  He tracked it down to two
problems, one of which is addressed by this patch.

It seems the setting of the channel bits for particular scanning modes
was incorrect for differential mode.  (Only half the number of channels
are available in differential mode; comedi refers to them as channels 0,
1, 2 and 3, but the hardware documentation refers to them as channels 0,
2, 4 and 6.)  In differential mode, the setting of the channel enable
bits in the command1 register should depend on whether the scan enable
bit is set.  Effectively, we need to double the comedi channel number
when the scan enable bit is not set in differential mode.  The scan
enable bit gets set when the AI scan mode is `MODE_MULT_CHAN_UP` or
`MODE_MULT_CHAN_DOWN`, and gets cleared when the AI scan mode is
`MODE_SINGLE_CHAN` or `MODE_SINGLE_CHAN_INTERVAL`.  The existing test
for whether the comedi channel number needs to be doubled in
differential mode is incorrect in `labpc_ai_cmd()`.  This patch corrects
the test.

Thanks to Tuomas for suggesting the fix.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/staging/comedi/drivers/ni_labpc.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/comedi/drivers/ni_labpc.c b/drivers/staging/comedi/drivers/ni_labpc.c
index 5b2b966..1e472ba 100644
--- a/drivers/staging/comedi/drivers/ni_labpc.c
+++ b/drivers/staging/comedi/drivers/ni_labpc.c
@@ -1259,7 +1259,9 @@ static int labpc_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
 	else
 		channel = CR_CHAN(cmd->chanlist[0]);
 	/* munge channel bits for differential / scan disabled mode */
-	if (labpc_ai_scan_mode(cmd) != MODE_SINGLE_CHAN && aref == AREF_DIFF)
+	if ((labpc_ai_scan_mode(cmd) == MODE_SINGLE_CHAN ||
+	     labpc_ai_scan_mode(cmd) == MODE_SINGLE_CHAN_INTERVAL) &&
+	    aref == AREF_DIFF)
 		channel *= 2;
 	devpriv->command1_bits |= ADC_CHAN_BITS(channel);
 	devpriv->command1_bits |= thisboard->ai_range_code[range];
-- 
1.8.1.2