From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>, stable@vger.kernel.org, Chris Packham <chris.packham@alliedtelesis.co.nz>, Joakim Tjernlund <Joakim.Tjernlund@infinera.com>, linux-mtd@lists.infradead.org, Fabio Bettoni <fbettoni@gmail.com>, Felix Fietkau <nbd@nbd.name>, Hauke Mehrtens <hauke@hauke-m.de>, Tokunori Ikegami <ikegami.t@gmail.com>, Vignesh Raghavendra <vigneshr@ti.com> Subject: [PATCH 4.4 06/99] mtd: cfi_cmdset_0002: Use chip_good() to retry in do_write_oneword() Date: Thu, 3 Oct 2019 17:52:29 +0200 [thread overview] Message-ID: <20191003154255.205877418@linuxfoundation.org> (raw) In-Reply-To: <20191003154252.297991283@linuxfoundation.org> From: Tokunori Ikegami <ikegami.t@gmail.com> commit 37c673ade35c707d50583b5b25091ff8ebdeafd7 upstream. As reported by the OpenWRT team, write requests sometimes fail on some platforms. Currently to check the state chip_ready() is used correctly as described by the flash memory S29GL256P11TFI01 datasheet. Also chip_good() is used to check if the write is succeeded and it was implemented by the commit fb4a90bfcd6d8 ("[MTD] CFI-0002 - Improve error checking"). But actually the write failure is caused on some platforms and also it can be fixed by using chip_good() to check the state and retry instead. Also it seems that it is caused after repeated about 1,000 times to retry the write one word with the reset command. By using chip_good() to check the state to be done it can be reduced the retry with reset. It is depended on the actual flash chip behavior so the root cause is unknown. Cc: Chris Packham <chris.packham@alliedtelesis.co.nz> Cc: Joakim Tjernlund <Joakim.Tjernlund@infinera.com> Cc: linux-mtd@lists.infradead.org Cc: stable@vger.kernel.org Reported-by: Fabio Bettoni <fbettoni@gmail.com> Signed-off-by: Felix Fietkau <nbd@nbd.name> Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> Signed-off-by: Tokunori Ikegami <ikegami.t@gmail.com> [vigneshr@ti.com: Fix a checkpatch warning] Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- drivers/mtd/chips/cfi_cmdset_0002.c | 18 ++++++++++++------ 1 file changed, 12 insertions(+), 6 deletions(-) --- a/drivers/mtd/chips/cfi_cmdset_0002.c +++ b/drivers/mtd/chips/cfi_cmdset_0002.c @@ -1626,29 +1626,35 @@ static int __xipram do_write_oneword(str continue; } - if (time_after(jiffies, timeo) && !chip_ready(map, adr)){ + /* + * We check "time_after" and "!chip_good" before checking + * "chip_good" to avoid the failure due to scheduling. + */ + if (time_after(jiffies, timeo) && !chip_good(map, adr, datum)) { xip_enable(map, chip, adr); printk(KERN_WARNING "MTD %s(): software timeout\n", __func__); xip_disable(map, chip, adr); + ret = -EIO; break; } - if (chip_ready(map, adr)) + if (chip_good(map, adr, datum)) break; /* Latency issues. Drop the lock, wait a while and retry */ UDELAY(map, chip, adr, 1); } + /* Did we succeed? */ - if (!chip_good(map, adr, datum)) { + if (ret) { /* reset on all failures. */ map_write( map, CMD(0xF0), chip->start ); /* FIXME - should have reset delay before continuing */ - if (++retry_cnt <= MAX_RETRIES) + if (++retry_cnt <= MAX_RETRIES) { + ret = 0; goto retry; - - ret = -EIO; + } } xip_enable(map, chip, adr); op_done:
WARNING: multiple messages have this Message-ID (diff)
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> To: linux-kernel@vger.kernel.org Cc: Tokunori Ikegami <ikegami.t@gmail.com>, Vignesh Raghavendra <vigneshr@ti.com>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, stable@vger.kernel.org, Joakim Tjernlund <Joakim.Tjernlund@infinera.com>, Chris Packham <chris.packham@alliedtelesis.co.nz>, linux-mtd@lists.infradead.org, Hauke Mehrtens <hauke@hauke-m.de>, Fabio Bettoni <fbettoni@gmail.com>, Felix Fietkau <nbd@nbd.name> Subject: [PATCH 4.4 06/99] mtd: cfi_cmdset_0002: Use chip_good() to retry in do_write_oneword() Date: Thu, 3 Oct 2019 17:52:29 +0200 [thread overview] Message-ID: <20191003154255.205877418@linuxfoundation.org> (raw) In-Reply-To: <20191003154252.297991283@linuxfoundation.org> From: Tokunori Ikegami <ikegami.t@gmail.com> commit 37c673ade35c707d50583b5b25091ff8ebdeafd7 upstream. As reported by the OpenWRT team, write requests sometimes fail on some platforms. Currently to check the state chip_ready() is used correctly as described by the flash memory S29GL256P11TFI01 datasheet. Also chip_good() is used to check if the write is succeeded and it was implemented by the commit fb4a90bfcd6d8 ("[MTD] CFI-0002 - Improve error checking"). But actually the write failure is caused on some platforms and also it can be fixed by using chip_good() to check the state and retry instead. Also it seems that it is caused after repeated about 1,000 times to retry the write one word with the reset command. By using chip_good() to check the state to be done it can be reduced the retry with reset. It is depended on the actual flash chip behavior so the root cause is unknown. Cc: Chris Packham <chris.packham@alliedtelesis.co.nz> Cc: Joakim Tjernlund <Joakim.Tjernlund@infinera.com> Cc: linux-mtd@lists.infradead.org Cc: stable@vger.kernel.org Reported-by: Fabio Bettoni <fbettoni@gmail.com> Signed-off-by: Felix Fietkau <nbd@nbd.name> Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> Signed-off-by: Tokunori Ikegami <ikegami.t@gmail.com> [vigneshr@ti.com: Fix a checkpatch warning] Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- drivers/mtd/chips/cfi_cmdset_0002.c | 18 ++++++++++++------ 1 file changed, 12 insertions(+), 6 deletions(-) --- a/drivers/mtd/chips/cfi_cmdset_0002.c +++ b/drivers/mtd/chips/cfi_cmdset_0002.c @@ -1626,29 +1626,35 @@ static int __xipram do_write_oneword(str continue; } - if (time_after(jiffies, timeo) && !chip_ready(map, adr)){ + /* + * We check "time_after" and "!chip_good" before checking + * "chip_good" to avoid the failure due to scheduling. + */ + if (time_after(jiffies, timeo) && !chip_good(map, adr, datum)) { xip_enable(map, chip, adr); printk(KERN_WARNING "MTD %s(): software timeout\n", __func__); xip_disable(map, chip, adr); + ret = -EIO; break; } - if (chip_ready(map, adr)) + if (chip_good(map, adr, datum)) break; /* Latency issues. Drop the lock, wait a while and retry */ UDELAY(map, chip, adr, 1); } + /* Did we succeed? */ - if (!chip_good(map, adr, datum)) { + if (ret) { /* reset on all failures. */ map_write( map, CMD(0xF0), chip->start ); /* FIXME - should have reset delay before continuing */ - if (++retry_cnt <= MAX_RETRIES) + if (++retry_cnt <= MAX_RETRIES) { + ret = 0; goto retry; - - ret = -EIO; + } } xip_enable(map, chip, adr); op_done: ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/
next prev parent reply other threads:[~2019-10-03 15:57 UTC|newest] Thread overview: 107+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-10-03 15:52 [PATCH 4.4 00/99] 4.4.195-stable review Greg Kroah-Hartman 2019-10-03 15:52 ` [PATCH 4.4 01/99] Revert "Bluetooth: validate BLE connection interval updates" Greg Kroah-Hartman 2019-10-03 15:52 ` [PATCH 4.4 02/99] HID: prodikeys: Fix general protection fault during probe Greg Kroah-Hartman 2019-10-03 15:52 ` [PATCH 4.4 03/99] HID: lg: make transfer buffers DMA capable Greg Kroah-Hartman 2019-10-03 15:52 ` [PATCH 4.4 04/99] HID: logitech: Fix general protection fault caused by Logitech driver Greg Kroah-Hartman 2019-10-03 15:52 ` [PATCH 4.4 05/99] HID: hidraw: Fix invalid read in hidraw_ioctl Greg Kroah-Hartman 2019-10-03 15:52 ` Greg Kroah-Hartman [this message] 2019-10-03 15:52 ` [PATCH 4.4 06/99] mtd: cfi_cmdset_0002: Use chip_good() to retry in do_write_oneword() Greg Kroah-Hartman 2019-10-03 15:52 ` [PATCH 4.4 07/99] crypto: talitos - fix missing break in switch statement Greg Kroah-Hartman 2019-10-03 15:52 ` [PATCH 4.4 08/99] [PATCH stable 4.4 net] net: rds: Fix NULL ptr use in rds_tcp_kill_sock Greg Kroah-Hartman 2019-10-03 15:52 ` [PATCH 4.4 09/99] ASoC: fsl: Fix of-node refcount unbalance in fsl_ssi_probe_from_dt() Greg Kroah-Hartman 2019-10-03 15:52 ` [PATCH 4.4 10/99] ALSA: hda - Add laptop imic fixup for ASUS M9V laptop Greg Kroah-Hartman 2019-10-03 15:52 ` [PATCH 4.4 11/99] mac80211: Print text for disassociation reason Greg Kroah-Hartman 2019-10-03 15:52 ` [PATCH 4.4 12/99] mac80211: handle deauthentication/disassociation from TDLS peer Greg Kroah-Hartman 2019-10-03 15:52 ` [PATCH 4.4 13/99] locking/lockdep: Add debug_locks check in __lock_downgrade() Greg Kroah-Hartman 2019-10-03 15:52 ` [PATCH 4.4 14/99] irqchip/gic-v3-its: Fix LPI release for Multi-MSI devices Greg Kroah-Hartman 2019-10-03 15:52 ` [PATCH 4.4 15/99] f2fs: check all the data segments against all node ones Greg Kroah-Hartman 2019-10-03 15:52 ` [PATCH 4.4 16/99] Revert "f2fs: avoid out-of-range memory access" Greg Kroah-Hartman 2019-10-03 15:52 ` [PATCH 4.4 17/99] f2fs: fix to do sanity check on segment bitmap of LFS curseg Greg Kroah-Hartman 2019-10-03 15:52 ` [PATCH 4.4 18/99] drm: Flush output polling on shutdown Greg Kroah-Hartman 2019-10-03 15:52 ` [PATCH 4.4 19/99] Bluetooth: btrtl: Additional Realtek 8822CE Bluetooth devices Greg Kroah-Hartman 2019-10-03 15:52 ` [PATCH 4.4 20/99] arcnet: provide a buffer big enough to actually receive packets Greg Kroah-Hartman 2019-10-03 15:52 ` [PATCH 4.4 21/99] cdc_ncm: fix divide-by-zero caused by invalid wMaxPacketSize Greg Kroah-Hartman 2019-10-03 15:52 ` [PATCH 4.4 22/99] net/phy: fix DP83865 10 Mbps HDX loopback disable function Greg Kroah-Hartman 2019-10-03 15:52 ` [PATCH 4.4 23/99] openvswitch: change type of UPCALL_PID attribute to NLA_UNSPEC Greg Kroah-Hartman 2019-10-03 15:52 ` [PATCH 4.4 24/99] sch_netem: fix a divide by zero in tabledist() Greg Kroah-Hartman 2019-10-03 15:52 ` [PATCH 4.4 25/99] skge: fix checksum byte order Greg Kroah-Hartman 2019-10-03 15:52 ` [PATCH 4.4 26/99] usbnet: ignore endpoints with invalid wMaxPacketSize Greg Kroah-Hartman 2019-10-03 15:52 ` [PATCH 4.4 27/99] usbnet: sanity checking of packet sizes and device mtu Greg Kroah-Hartman 2019-10-03 15:52 ` [PATCH 4.4 28/99] mISDN: enforce CAP_NET_RAW for raw sockets Greg Kroah-Hartman 2019-10-03 15:52 ` [PATCH 4.4 29/99] appletalk: " Greg Kroah-Hartman 2019-10-03 15:52 ` [PATCH 4.4 30/99] ax25: " Greg Kroah-Hartman 2019-10-03 15:52 ` [PATCH 4.4 31/99] ieee802154: " Greg Kroah-Hartman 2019-10-03 15:52 ` [PATCH 4.4 32/99] nfc: " Greg Kroah-Hartman 2019-10-03 15:52 ` [PATCH 4.4 33/99] ALSA: hda: Flush interrupts on disabling Greg Kroah-Hartman 2019-10-03 15:52 ` [PATCH 4.4 34/99] ASoC: sgtl5000: Fix charge pump source assignment Greg Kroah-Hartman 2019-10-03 15:52 ` [PATCH 4.4 35/99] dmaengine: bcm2835: Print error in case setting DMA mask fails Greg Kroah-Hartman 2019-10-03 15:52 ` [PATCH 4.4 36/99] leds: leds-lp5562 allow firmware files up to the maximum length Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 37/99] media: dib0700: fix link error for dibx000_i2c_set_speed Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 38/99] media: hdpvr: Add device num check and handling Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 39/99] sched/fair: Fix imbalance due to CPU affinity Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 40/99] sched/core: Fix CPU controller for !RT_GROUP_SCHED Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 41/99] x86/reboot: Always use NMI fallback when shutdown via reboot vector IPI fails Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 42/99] x86/apic: Soft disable APIC before initializing it Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 43/99] ALSA: hda - Show the fatal CORB/RIRB error more clearly Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 44/99] ALSA: i2c: ak4xxx-adda: Fix a possible null pointer dereference in build_adc_controls() Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 45/99] media: iguanair: add sanity checks Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 46/99] base: soc: Export soc_device_register/unregister APIs Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 47/99] ALSA: usb-audio: Skip bSynchAddress endpoint check if it is invalid Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 48/99] ia64:unwind: fix double free for mod->arch.init_unw_table Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 49/99] md: dont call spare_active in md_reap_sync_thread if all member devices cant work Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 50/99] md: dont set In_sync if array is frozen Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 51/99] efi: cper: print AER info of PCIe fatal error Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 52/99] media: gspca: zero usb_buf on error Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 53/99] dmaengine: iop-adma: use correct printk format strings Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 54/99] media: omap3isp: Dont set streaming state on random subdevs Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 55/99] net: lpc-enet: fix printk format strings Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 56/99] media: radio/si470x: kill urb on error Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 57/99] media: hdpvr: add terminating 0 at end of string Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 58/99] media: saa7146: add cleanup in hexium_attach() Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 59/99] media: cpia2_usb: fix memory leaks Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 60/99] media: saa7134: fix terminology around saa7134_i2c_eeprom_md7134_gate() Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 61/99] media: ov9650: add a sanity check Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 62/99] ACPI / CPPC: do not require the _PSD method Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 63/99] libtraceevent: Change users plugin directory Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 64/99] ACPI: custom_method: fix memory leaks Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 65/99] hwmon: (acpi_power_meter) Change log level for unsafe software power cap Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 66/99] md/raid1: fail run raid1 array when active disk less than one Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 67/99] dmaengine: ti: edma: Do not reset reserved paRAM slots Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 68/99] kprobes: Prohibit probing on BUG() and WARN() address Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 69/99] ASoC: dmaengine: Make the pcm->name equal to pcm->id if the name is not set Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 70/99] mmc: sdhci: Fix incorrect switch to HS mode Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 71/99] libertas: Add missing sentinel at end of if_usb.c fw_table Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 72/99] media: ttusb-dec: Fix info-leak in ttusb_dec_send_command() Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 73/99] ALSA: hda/realtek - Blacklist PC beep for Lenovo ThinkCentre M73/93 Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 74/99] btrfs: extent-tree: Make sure we only allocate extents from block groups with the same type Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 75/99] media: omap3isp: Set device on omap3isp subdevs Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 76/99] ALSA: firewire-tascam: handle error code when getting current source of clock Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 77/99] ALSA: firewire-tascam: check intermediate state of clock status and retry Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 78/99] printk: Do not lose last line in kmsg buffer dump Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 79/99] fuse: fix missing unlock_page in fuse_writepage() Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 80/99] parisc: Disable HP HSC-PCI Cards to prevent kernel crash Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 81/99] KVM: x86: always stop emulation on page fault Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 82/99] KVM: x86: set ctxt->have_exception in x86_decode_insn() Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 83/99] KVM: x86: Manually calculate reserved bits when loading PDPTRS Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 84/99] media: sn9c20x: Add MSI MS-1039 laptop to flip_dmi_table Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 85/99] ASoC: Intel: Fix use of potentially uninitialized variable Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 86/99] ARM: zynq: Use memcpy_toio instead of memcpy on smp bring-up Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 87/99] alarmtimer: Use EOPNOTSUPP instead of ENOTSUPP Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 88/99] md/raid6: Set R5_ReadError when there is read failure on parity disk Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 89/99] cfg80211: Purge frame registrations on iftype change Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 90/99] /dev/mem: Bail out upon SIGKILL Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 91/99] ext4: fix punch hole for inline_data file systems Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 92/99] quota: fix wrong condition in is_quota_modification() Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 93/99] hwrng: core - dont wait on add_early_randomness() Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 94/99] i2c: riic: Clear NACK in tend isr Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 95/99] CIFS: Fix oplock handling for SMB 2.1+ protocols Greg Kroah-Hartman 2019-10-03 15:53 ` [PATCH 4.4 96/99] ovl: filter of trusted xattr results in audit Greg Kroah-Hartman 2019-10-03 15:54 ` [PATCH 4.4 97/99] Btrfs: fix use-after-free when using the tree modification log Greg Kroah-Hartman 2019-10-03 15:54 ` [PATCH 4.4 98/99] btrfs: Relinquish CPUs in btrfs_compare_trees Greg Kroah-Hartman 2019-10-03 15:54 ` [PATCH 4.4 99/99] Btrfs: fix race setting up and completing qgroup rescan workers Greg Kroah-Hartman 2019-10-03 23:53 ` [PATCH 4.4 00/99] 4.4.195-stable review shuah 2019-10-04 6:41 ` kernelci.org bot 2019-10-04 7:36 ` Jon Hunter 2019-10-04 7:36 ` Jon Hunter 2019-10-04 15:02 ` Dan Rue 2019-10-04 22:55 ` Guenter Roeck
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