From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org,
Marek Szyprowski <m.szyprowski@samsung.com>,
Lukas Wunner <lukas@wunner.de>,
"Rafael J. Wysocki" <rafael.j.wysocki@intel.com>,
Andrew Lunn <andrew@lunn.ch>, Jakub Kicinski <kuba@kernel.org>
Subject: [PATCH 5.18 008/102] net: phy: Dont trigger state machine while in suspend
Date: Tue, 5 Jul 2022 13:57:34 +0200 [thread overview]
Message-ID: <20220705115618.651318174@linuxfoundation.org> (raw)
In-Reply-To: <20220705115618.410217782@linuxfoundation.org>
From: Lukas Wunner <lukas@wunner.de>
commit 1758bde2e4aa5ff188d53e7d9d388bbb7e12eebb upstream.
Upon system sleep, mdio_bus_phy_suspend() stops the phy_state_machine(),
but subsequent interrupts may retrigger it:
They may have been left enabled to facilitate wakeup and are not
quiesced until the ->suspend_noirq() phase. Unwanted interrupts may
hence occur between mdio_bus_phy_suspend() and dpm_suspend_noirq(),
as well as between dpm_resume_noirq() and mdio_bus_phy_resume().
Retriggering the phy_state_machine() through an interrupt is not only
undesirable for the reason given in mdio_bus_phy_suspend() (freezing it
midway with phydev->lock held), but also because the PHY may be
inaccessible after it's suspended: Accesses to USB-attached PHYs are
blocked once usb_suspend_both() clears the can_submit flag and PHYs on
PCI network cards may become inaccessible upon suspend as well.
Amend phy_interrupt() to avoid triggering the state machine if the PHY
is suspended. Signal wakeup instead if the attached net_device or its
parent has been configured as a wakeup source. (Those conditions are
identical to mdio_bus_phy_may_suspend().) Postpone handling of the
interrupt until the PHY has resumed.
Before stopping the phy_state_machine() in mdio_bus_phy_suspend(),
wait for a concurrent phy_interrupt() to run to completion. That is
necessary because phy_interrupt() may have checked the PHY's suspend
status before the system sleep transition commenced and it may thus
retrigger the state machine after it was stopped.
Likewise, after re-enabling interrupt handling in mdio_bus_phy_resume(),
wait for a concurrent phy_interrupt() to complete to ensure that
interrupts which it postponed are properly rerun.
The issue was exposed by commit 1ce8b37241ed ("usbnet: smsc95xx: Forward
PHY interrupts to PHY driver to avoid polling"), but has existed since
forever.
Fixes: 541cd3ee00a4 ("phylib: Fix deadlock on resume")
Link: https://lore.kernel.org/netdev/a5315a8a-32c2-962f-f696-de9a26d30091@samsung.com/
Reported-by: Marek Szyprowski <m.szyprowski@samsung.com>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: stable@vger.kernel.org # v2.6.33+
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/b7f386d04e9b5b0e2738f0125743e30676f309ef.1656410895.git.lukas@wunner.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/net/phy/phy.c | 23 +++++++++++++++++++++++
drivers/net/phy/phy_device.c | 23 +++++++++++++++++++++++
include/linux/phy.h | 6 ++++++
3 files changed, 52 insertions(+)
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -31,6 +31,7 @@
#include <linux/io.h>
#include <linux/uaccess.h>
#include <linux/atomic.h>
+#include <linux/suspend.h>
#include <net/netlink.h>
#include <net/genetlink.h>
#include <net/sock.h>
@@ -972,6 +973,28 @@ static irqreturn_t phy_interrupt(int irq
struct phy_driver *drv = phydev->drv;
irqreturn_t ret;
+ /* Wakeup interrupts may occur during a system sleep transition.
+ * Postpone handling until the PHY has resumed.
+ */
+ if (IS_ENABLED(CONFIG_PM_SLEEP) && phydev->irq_suspended) {
+ struct net_device *netdev = phydev->attached_dev;
+
+ if (netdev) {
+ struct device *parent = netdev->dev.parent;
+
+ if (netdev->wol_enabled)
+ pm_system_wakeup();
+ else if (device_may_wakeup(&netdev->dev))
+ pm_wakeup_dev_event(&netdev->dev, 0, true);
+ else if (parent && device_may_wakeup(parent))
+ pm_wakeup_dev_event(parent, 0, true);
+ }
+
+ phydev->irq_rerun = 1;
+ disable_irq_nosync(irq);
+ return IRQ_HANDLED;
+ }
+
mutex_lock(&phydev->lock);
ret = drv->handle_interrupt(phydev);
mutex_unlock(&phydev->lock);
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -277,6 +277,15 @@ static __maybe_unused int mdio_bus_phy_s
if (phydev->mac_managed_pm)
return 0;
+ /* Wakeup interrupts may occur during the system sleep transition when
+ * the PHY is inaccessible. Set flag to postpone handling until the PHY
+ * has resumed. Wait for concurrent interrupt handler to complete.
+ */
+ if (phy_interrupt_is_valid(phydev)) {
+ phydev->irq_suspended = 1;
+ synchronize_irq(phydev->irq);
+ }
+
/* We must stop the state machine manually, otherwise it stops out of
* control, possibly with the phydev->lock held. Upon resume, netdev
* may call phy routines that try to grab the same lock, and that may
@@ -314,6 +323,20 @@ static __maybe_unused int mdio_bus_phy_r
if (ret < 0)
return ret;
no_resume:
+ if (phy_interrupt_is_valid(phydev)) {
+ phydev->irq_suspended = 0;
+ synchronize_irq(phydev->irq);
+
+ /* Rerun interrupts which were postponed by phy_interrupt()
+ * because they occurred during the system sleep transition.
+ */
+ if (phydev->irq_rerun) {
+ phydev->irq_rerun = 0;
+ enable_irq(phydev->irq);
+ irq_wake_thread(phydev->irq, phydev);
+ }
+ }
+
if (phydev->attached_dev && phydev->adjust_link)
phy_start_machine(phydev);
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -571,6 +571,10 @@ struct macsec_ops;
* @mdix: Current crossover
* @mdix_ctrl: User setting of crossover
* @interrupts: Flag interrupts have been enabled
+ * @irq_suspended: Flag indicating PHY is suspended and therefore interrupt
+ * handling shall be postponed until PHY has resumed
+ * @irq_rerun: Flag indicating interrupts occurred while PHY was suspended,
+ * requiring a rerun of the interrupt handler after resume
* @interface: enum phy_interface_t value
* @skb: Netlink message for cable diagnostics
* @nest: Netlink nest used for cable diagnostics
@@ -625,6 +629,8 @@ struct phy_device {
/* Interrupts are enabled */
unsigned interrupts:1;
+ unsigned irq_suspended:1;
+ unsigned irq_rerun:1;
enum phy_state state;
next prev parent reply other threads:[~2022-07-05 12:24 UTC|newest]
Thread overview: 113+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-05 11:57 [PATCH 5.18 000/102] 5.18.10-rc1 review Greg Kroah-Hartman
2022-07-05 11:57 ` [PATCH 5.18 001/102] drm/amdgpu: fix adev variable used in amdgpu_device_gpu_recover() Greg Kroah-Hartman
2022-07-05 11:57 ` [PATCH 5.18 002/102] Revert "drm/amdgpu/display: set vblank_disable_immediate for DC" Greg Kroah-Hartman
2022-07-05 11:57 ` [PATCH 5.18 003/102] drm/amdgpu: To flush tlb for MMHUB of RAVEN series Greg Kroah-Hartman
2022-07-05 11:57 ` [PATCH 5.18 004/102] ksmbd: set the range of bytes to zero without extending file size in FSCTL_ZERO_DATA Greg Kroah-Hartman
2022-07-05 11:57 ` [PATCH 5.18 005/102] ksmbd: check invalid FileOffset and BeyondFinalZero " Greg Kroah-Hartman
2022-07-05 11:57 ` [PATCH 5.18 006/102] ksmbd: use vfs_llseek instead of dereferencing NULL Greg Kroah-Hartman
2022-07-05 11:57 ` [PATCH 5.18 007/102] ipv6: take care of disable_policy when restoring routes Greg Kroah-Hartman
2022-07-05 11:57 ` Greg Kroah-Hartman [this message]
2022-07-05 11:57 ` [PATCH 5.18 009/102] s390/archrandom: simplify back to earlier design and initialize earlier Greg Kroah-Hartman
2022-07-05 11:57 ` [PATCH 5.18 010/102] nvme-pci: add NVME_QUIRK_BOGUS_NID for ADATA XPG SX6000LNP (AKA SPECTRIX S40G) Greg Kroah-Hartman
2022-07-05 11:57 ` [PATCH 5.18 011/102] nvme-pci: add NVME_QUIRK_BOGUS_NID for ADATA IM2P33F8ABR1 Greg Kroah-Hartman
2022-07-05 11:57 ` [PATCH 5.18 012/102] nvdimm: Fix badblocks clear off-by-one error Greg Kroah-Hartman
2022-07-05 11:57 ` [PATCH 5.18 013/102] ceph: wait on async create before checking caps for syncfs Greg Kroah-Hartman
2022-07-05 11:57 ` [PATCH 5.18 014/102] parisc: Fix vDSO signal breakage on 32-bit kernel Greg Kroah-Hartman
2022-07-05 11:57 ` [PATCH 5.18 015/102] parisc/unaligned: Fix emulate_ldw() breakage Greg Kroah-Hartman
2022-07-05 11:57 ` [PATCH 5.18 016/102] powerpc/prom_init: Fix kernel config grep Greg Kroah-Hartman
2022-07-05 11:57 ` [PATCH 5.18 017/102] powerpc/book3e: Fix PUD allocation size in map_kernel_page() Greg Kroah-Hartman
2022-07-05 11:57 ` [PATCH 5.18 018/102] powerpc/bpf: Fix use of user_pt_regs in uapi Greg Kroah-Hartman
2022-07-05 11:57 ` [PATCH 5.18 019/102] cpufreq: amd-pstate: Add resume and suspend callbacks Greg Kroah-Hartman
2022-07-05 11:57 ` [PATCH 5.18 020/102] dm raid: fix accesses beyond end of raid member array Greg Kroah-Hartman
2022-07-05 11:57 ` [PATCH 5.18 021/102] dm raid: fix KASAN warning in raid5_add_disks Greg Kroah-Hartman
2022-07-05 11:57 ` [PATCH 5.18 022/102] SUNRPC: Fix READ_PLUS crasher Greg Kroah-Hartman
2022-07-05 11:57 ` [PATCH 5.18 023/102] net: rose: fix UAF bugs caused by timer handler Greg Kroah-Hartman
2022-07-05 11:57 ` [PATCH 5.18 024/102] net: usb: ax88179_178a: Fix packet receiving Greg Kroah-Hartman
2022-07-05 11:57 ` [PATCH 5.18 025/102] virtio-net: fix race between ndo_open() and virtio_device_ready() Greg Kroah-Hartman
2022-07-05 11:57 ` [PATCH 5.18 026/102] selftests/net: pass ipv6_args to udpgso_benchs IPv6 TCP test Greg Kroah-Hartman
2022-07-05 11:57 ` [PATCH 5.18 027/102] net: dsa: bcm_sf2: force pause link settings Greg Kroah-Hartman
2022-07-05 11:57 ` [PATCH 5.18 028/102] net: tun: unlink NAPI from device on destruction Greg Kroah-Hartman
2022-07-05 11:57 ` [PATCH 5.18 029/102] net: tun: stop NAPI when detaching queues Greg Kroah-Hartman
2022-07-05 11:57 ` [PATCH 5.18 030/102] net: fix IFF_TX_SKB_NO_LINEAR definition Greg Kroah-Hartman
2022-07-05 11:57 ` [PATCH 5.18 031/102] net: dp83822: disable false carrier interrupt Greg Kroah-Hartman
2022-07-05 11:57 ` [PATCH 5.18 032/102] net: dp83822: disable rx error interrupt Greg Kroah-Hartman
2022-07-05 11:57 ` [PATCH 5.18 033/102] RDMA/qedr: Fix reporting QP timeout attribute Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 034/102] RDMA/cm: Fix memory leak in ib_cm_insert_listen Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 035/102] linux/dim: Fix divide by 0 in RDMA DIM Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 036/102] net: usb: asix: do not force pause frames support Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 037/102] usbnet: fix memory allocation in helpers Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 038/102] mptcp: fix race on unaccepted mptcp sockets Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 039/102] selftests: mptcp: more stable diag tests Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 040/102] mptcp: fix conflict with <netinet/in.h> Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 041/102] selftests: mptcp: Initialize variables to quiet gcc 12 warnings Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 042/102] hwmon: (occ) Prevent power cap command overwriting poll response Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 043/102] net: ipv6: unexport __init-annotated seg6_hmac_net_init() Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 044/102] NFS: restore module put when manager exits Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 045/102] NFSD: restore EINVAL error translation in nfsd_commit() Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 046/102] NFSv4: Add an fattr allocation to _nfs4_discover_trunking() Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 047/102] vfs: fix copy_file_range() regression in cross-fs copies Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 048/102] caif_virtio: fix race between virtio_device_ready() and ndo_open() Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 049/102] io_uring: ensure that send/sendmsg and recv/recvmsg check sqe->ioprio Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 050/102] PM / devfreq: exynos-ppmu: Fix refcount leak in of_get_devfreq_events Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 051/102] lib/sbitmap: Fix invalid loop in __sbitmap_queue_get_batch() Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 052/102] vdpa/mlx5: Update Control VQ callback information Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 053/102] s390: remove unneeded select BUILD_BIN2C Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 054/102] netfilter: nft_dynset: restore set element counter when failing to update Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 055/102] net/dsa/hirschmann: Add missing of_node_get() in hellcreek_led_setup() Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 056/102] net/sched: act_api: Notify user space if any actions were flushed before error Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 057/102] net: asix: fix "cant send until first packet is send" issue Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 058/102] net: bonding: fix possible NULL deref in rlb code Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 059/102] net: phy: ax88772a: fix lost pause advertisement configuration Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 060/102] selftests net: fix kselftest net fatal error Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 061/102] net: bonding: fix use-after-free after 802.3ad slave unbind Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 062/102] net: dsa: felix: fix race between reading PSFP stats and port stats Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 063/102] powerpc/memhotplug: Add add_pages override for PPC Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 064/102] platform/x86: thinkpad_acpi: Fix a memory leak of EFCH MMIO resource Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 065/102] platform/x86: ideapad-laptop: Add Ideapad 5 15ITL05 to ideapad_dytc_v4_allow_table[] Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 066/102] nfc: nfcmrvl: Fix irq_of_parse_and_map() return value Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 067/102] NFC: nxp-nci: Dont issue a zero length i2c_master_read() Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 068/102] tipc: move bc link creation back to tipc_node_create Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 069/102] epic100: fix use after free on rmmod Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 070/102] cpufreq: qcom-hw: Dont do lmh things without a throttle interrupt Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 071/102] tcp: add a missing nf_reset_ct() in 3WHS handling Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 072/102] nvmet-tcp: fix regression in data_digest calculation Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 073/102] ACPI: video: Change how we determine if brightness key-presses are handled Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 074/102] tunnels: do not assume mac header is set in skb_tunnel_check_pmtu() Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 075/102] fanotify: refine the validation checks on non-dir inode mask Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 076/102] nvmet: add a clear_ids attribute for passthru targets Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 077/102] ipv6/sit: fix ipip6_tunnel_get_prl return value Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 078/102] ipv6: fix lockdep splat in in6_dump_addrs() Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 079/102] mlxsw: spectrum_router: Fix rollback in tunnel next hop init Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 080/102] net: tun: avoid disabling NAPI twice Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 081/102] cifs: fix minor compile warning Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 082/102] drm/msm/dpu: Increment vsync_cnt before waking up userspace Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 083/102] platform/x86: ideapad-laptop: Add allow_v4_dytc module parameter Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 084/102] drm/i915/gem: add missing else Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 085/102] drm/i915/dgfx: Disable d3cold at gfx root port Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 086/102] drm/msm/gem: Fix error return on fence id alloc fail Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 087/102] drivers: cpufreq: Add missing of_node_put() in qoriq-cpufreq.c Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 088/102] platform/x86: panasonic-laptop: de-obfuscate button codes Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 089/102] platform/x86: panasonic-laptop: sort includes alphabetically Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 090/102] platform/x86: panasonic-laptop: revert "Resolve hotkey double trigger bug" Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 091/102] platform/x86: panasonic-laptop: dont report duplicate brightness key-presses Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 092/102] platform/x86: panasonic-laptop: filter out duplicate volume up/down/mute keypresses Greg Kroah-Hartman
2022-07-05 11:58 ` [PATCH 5.18 093/102] drm/fourcc: fix integer type usage in uapi header Greg Kroah-Hartman
2022-07-05 11:59 ` [PATCH 5.18 094/102] net: sparx5: Add handling of host MDB entries Greg Kroah-Hartman
2022-07-05 11:59 ` [PATCH 5.18 095/102] net: sparx5: mdb add/del handle non-sparx5 devices Greg Kroah-Hartman
2022-07-05 11:59 ` [PATCH 5.18 096/102] hwmon: (ibmaem) dont call platform_device_del() if platform_device_add() fails Greg Kroah-Hartman
2022-07-05 11:59 ` [PATCH 5.18 097/102] xen/blkfront: fix leaking data in shared pages Greg Kroah-Hartman
2022-07-05 11:59 ` [PATCH 5.18 098/102] xen/netfront: " Greg Kroah-Hartman
2022-07-05 11:59 ` [PATCH 5.18 099/102] xen/netfront: force data bouncing when backend is untrusted Greg Kroah-Hartman
2022-07-05 11:59 ` [PATCH 5.18 100/102] xen/blkfront: " Greg Kroah-Hartman
2022-07-05 11:59 ` [PATCH 5.18 101/102] xen-netfront: restore __skb_queue_tail() positioning in xennet_get_responses() Greg Kroah-Hartman
2022-07-05 11:59 ` [PATCH 5.18 102/102] xen/arm: Fix race in RB-tree based P2M accounting Greg Kroah-Hartman
2022-07-05 14:35 ` [PATCH 5.18 000/102] 5.18.10-rc1 review Jon Hunter
2022-07-05 17:06 ` Justin Forbes
2022-07-05 17:31 ` Fenil Jain
2022-07-05 18:55 ` Florian Fainelli
2022-07-05 20:57 ` Ron Economos
2022-07-06 6:17 ` Naresh Kamboju
2022-07-06 9:39 ` Rudi Heitbaum
2022-07-06 10:13 ` Sudip Mukherjee (Codethink)
2022-07-06 13:45 ` Guenter Roeck
2022-07-06 23:52 ` Shuah Khan
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