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linux-stable/drivers/watchdog
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Sai Prakash Ranjan 8442ef6f11 watchdog: qcom: Move suspend/resume to suspend_late/resume_early 
During suspend/resume usecases and tests, it is common to see issues
such as lockups either in suspend path or resume path because of the
bugs in the corresponding device driver pm handling code. In such cases,
it is important that watchdog is active to make sure that we either
receive a watchdog pretimeout notification or a bite causing reset
instead of a hang causing us to hard reset the machine.

There are good reasons as to why we need this because:

* We can have a watchdog pretimeout governor set to panic in which
  case we can have a backtrace which would help identify the issue
  with the particular driver and cause a normal reboot.

* Even in case where there is no pretimeout support, a watchdog
  bite is still useful because some firmware has debug support to dump
  CPU core context on watchdog bite for post-mortem analysis.

* One more usecase which comes to mind is of warm reboot. In case we
  hard reset the target, a cold reboot could be induced resulting in
  lose of ddr contents thereby losing all the debug info.

Currently, the watchdog pm callback just invokes the usual suspend
and resume callback which do not have any special ordering in the
sense that a watchdog can be suspended before the buggy device driver
suspend callback and watchdog resume can happen after the buggy device
driver resume callback. This would mean that the watchdog will not be
active when the buggy driver cause the lockups thereby hanging the
system. So to make sure this doesn't happen, move the watchdog pm to
use late/early system pm callbacks which will ensure that the watchdog
is suspended late and resumed early so that it can catch such issues.

Signed-off-by: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Link: https://lore.kernel.org/r/20210310202004.1436-1-saiprakash.ranjan@codeaurora.org
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
2021-06-21 08:49:12 +02:00
..
acquirewdt.c compat_ioctl: move WDIOC handling into wdt drivers 2019-10-23 17:23:46 +02:00
advantechwdt.c watchdog: Use fallthrough pseudo-keyword 2020-08-05 18:42:53 +02:00
alim1535_wdt.c watchdog: Use fallthrough pseudo-keyword 2020-08-05 18:42:53 +02:00
alim7101_wdt.c watchdog: Use fallthrough pseudo-keyword 2020-08-05 18:42:53 +02:00
ar7_wdt.c watchdog: Use fallthrough pseudo-keyword 2020-08-05 18:42:53 +02:00
arm_smc_wdt.c watchdog: Add new arm_smc_wdt watchdog driver 2020-05-25 08:55:46 +02:00
armada_37xx_wdt.c treewide: change my e-mail address, fix my name 2021-04-09 14:54:23 -07:00
asm9260_wdt.c
aspeed_wdt.c watchdog: aspeed: fix hardware timeout calculation 2021-06-21 08:49:04 +02:00
at91rm9200_wdt.c compat_ioctl: move WDIOC handling into wdt drivers 2019-10-23 17:23:46 +02:00
at91sam9_wdt.c
at91sam9_wdt.h watchdog: sama5d4_wdt: addition of sam9x60 compatible watchdog 2020-01-27 15:55:44 +01:00
ath79_wdt.c watchdog: Use fallthrough pseudo-keyword 2020-08-05 18:42:53 +02:00
bcm47xx_wdt.c
bcm63xx_wdt.c remove ioremap_nocache and devm_ioremap_nocache 2020-01-06 09:45:59 +01:00
bcm2835_wdt.c
bcm7038_wdt.c watchdog: bcm7038_wdt: add big endian support 2021-06-21 08:49:09 +02:00
bcm_kona_wdt.c watchdog: bcm_kona_wdt: Use correct return value for bcm_kona_wdt_probe() 2020-08-05 18:42:46 +02:00
bd9576_wdt.c wdt: Support wdt on ROHM BD9576MUF and BD9573MUF 2021-03-10 10:58:44 +00:00
bd70528_wdt.c watchdog: bd70528: Trivial function documentation fix 2019-11-18 19:53:41 +01:00
booke_wdt.c watchdog: fix syntactic kernel-doc issues 2021-06-21 08:49:09 +02:00
cadence_wdt.c watchdog: cadence: Simplify with dev_err_probe() 2020-10-14 15:02:24 +02:00
cpu5wdt.c module: remove never implemented MODULE_SUPPORTED_DEVICE 2021-03-17 13:16:18 -07:00
cpwd.c module: remove never implemented MODULE_SUPPORTED_DEVICE 2021-03-17 13:16:18 -07:00
da9052_wdt.c
da9055_wdt.c
da9062_wdt.c watchdog: da9062: No need to ping manually before setting timeout 2020-05-25 08:55:44 +02:00
da9063_wdt.c watchdog: da9063: Make use of pre-configured timeout during probe 2020-05-25 08:55:43 +02:00
davinci_wdt.c watchdog: davinci: Simplify with dev_err_probe() 2020-10-14 15:02:25 +02:00
diag288_wdt.c watchdog: diag288_wdt: Remove leftover includes from conversion to watchdog API 2019-09-17 08:59:01 +02:00
digicolor_wdt.c watchdog: digicolor_wdt: Remove unused variable in dc_wdt_probe 2019-07-15 08:49:11 +02:00
dw_wdt.c watchdog: dw_wdt: Fix duplicate included linux/kernel.h 2021-06-21 08:48:59 +02:00
ebc-c384_wdt.c watchdog: convert remaining drivers to use SPDX license identifier 2019-07-08 20:35:11 +02:00
ep93xx_wdt.c
eurotechwdt.c watchdog: fix syntactic kernel-doc issues 2021-06-21 08:49:09 +02:00
f71808e_wdt.c watchdog: Use fallthrough pseudo-keyword 2020-08-05 18:42:53 +02:00
ftwdt010_wdt.c
gef_wdt.c watchdog: Use fallthrough pseudo-keyword 2020-08-05 18:42:53 +02:00
geodewdt.c watchdog: geodewdt: remove unneeded break 2020-12-13 16:17:41 +01:00
gpio_wdt.c
hpwdt.c watchdog/hpwdt: New PCI IDs 2021-06-21 08:49:00 +02:00
i6300esb.c
ib700wdt.c watchdog: Use fallthrough pseudo-keyword 2020-08-05 18:42:53 +02:00
ibmasr.c compat_ioctl: move WDIOC handling into wdt drivers 2019-10-23 17:23:46 +02:00
ie6xx_wdt.c watchdog: ie6xx_wdt: Use spinlock_t instead of struct spinlock 2019-07-08 20:46:48 +02:00
imgpdc_wdt.c
imx2_wdt.c watchdog: imx2_wdt: avoid to ping before resume back 2021-06-21 08:48:59 +02:00
imx7ulp_wdt.c watchdog: imx7ulp: Watchdog should continue running for wait/stop mode 2020-10-14 15:02:26 +02:00
imx_sc_wdt.c watchdog: imx_sc_wdt: Fix reboot on crash 2020-05-25 08:55:40 +02:00
indydog.c compat_ioctl: move WDIOC handling into wdt drivers 2019-10-23 17:23:46 +02:00
intel-mid_wdt.c watchdog: intel-mid_wdt: Postpone IRQ handler registration till SCU is ready 2021-01-25 20:05:32 +02:00
iop_wdt.c compat_ioctl: move WDIOC handling into wdt drivers 2019-10-23 17:23:46 +02:00
it87_wdt.c watchdog: it87_wdt: remove useless function 2021-06-21 08:49:04 +02:00
it8712f_wdt.c watchdog: it8712f_wdt: remove definition of DEBUG 2021-02-07 14:41:18 +01:00
iTCO_vendor.h watchdog: iTCO_wdt: Export vendorsupport 2020-03-10 10:20:27 +01:00
iTCO_vendor_support.c watchdog: iTCO_wdt: Export vendorsupport 2020-03-10 10:20:27 +01:00
iTCO_wdt.c watchdog: iTCO_wdt: use dev_*() instead of pr_*() for logging 2020-12-17 06:55:14 +01:00
ixp4xx_wdt.c watchdog: Use fallthrough pseudo-keyword 2020-08-05 18:42:53 +02:00
jz4740_wdt.c watchdog: jz4740: Fix return value check in jz4740_wdt_probe() 2021-06-21 08:49:11 +02:00
Kconfig watchdog: Remove MV64x60 watchdog driver 2021-06-21 08:49:11 +02:00
keembay_wdt.c watchdog: keembay: Typo corrections and other blank operations 2021-06-21 08:48:57 +02:00
kempld_wdt.c
lantiq_wdt.c
loongson1_wdt.c
lpc18xx_wdt.c watchdog: Fix possible use-after-free by calling del_timer_sync() 2021-06-21 08:49:03 +02:00
m54xx_wdt.c watchdog: Use fallthrough pseudo-keyword 2020-08-05 18:42:53 +02:00
machzwd.c watchdog: Use fallthrough pseudo-keyword 2020-08-05 18:42:53 +02:00
Makefile watchdog: Remove MV64x60 watchdog driver 2021-06-21 08:49:11 +02:00
max63xx_wdt.c
max77620_wdt.c
mei_wdt.c watchdog: fix syntactic kernel-doc issues 2021-06-21 08:49:09 +02:00
mena21_wdt.c
menf21bmc_wdt.c
menz69_wdt.c drivers: mcb: use symbol namespaces 2019-11-03 19:54:53 +01:00
meson_gxbb_wdt.c watchdog: meson: Fix the wrong value of left time 2019-11-05 16:58:12 +01:00
meson_wdt.c watchdog: meson_wdt: Use device_get_match_data() helper 2021-06-21 08:49:05 +02:00
mixcomwd.c compat_ioctl: move WDIOC handling into wdt drivers 2019-10-23 17:23:46 +02:00
mlx_wdt.c watchdog: mlx-wdt: support new watchdog type with longer timeout period 2020-08-05 18:42:45 +02:00
moxart_wdt.c
mpc8xxx_wdt.c watchdog: convert comma to semicolon 2020-12-17 21:58:46 +01:00
mt7621_wdt.c
mtk_wdt.c watchdog: mtk: support pre-timeout when the bark irq is available 2021-06-21 08:49:10 +02:00
mtx-1_wdt.c watchdog: mtx-1: drop au1000.h header file 2021-06-21 08:48:58 +02:00
ni903x_wdt.c
nic7018_wdt.c
npcm_wdt.c watchdog: npcm: Add support for WPCM450 2021-04-09 14:11:24 +09:30
nv_tco.c watchdog: Replace HTTP links with HTTPS ones 2020-08-05 18:43:01 +02:00
nv_tco.h watchdog: Replace HTTP links with HTTPS ones 2020-08-05 18:43:01 +02:00
octeon-wdt-main.c watchdog: fix syntactic kernel-doc issues 2021-06-21 08:49:09 +02:00
octeon-wdt-nmi.S
of_xilinx_wdt.c watchdog: of_xilinx_wdt: Skip printing pointer value 2021-06-21 08:49:08 +02:00
omap_wdt.c watchdog: Fix runtime PM imbalance on error 2020-05-25 08:55:46 +02:00
omap_wdt.h watchdog: convert remaining drivers to use SPDX license identifier 2019-07-08 20:35:11 +02:00
orion_wdt.c watchdog: Fix a typo in the file orion_wdt.c 2021-06-21 08:49:12 +02:00
pc87413_wdt.c watchdog: fix syntactic kernel-doc issues 2021-06-21 08:49:09 +02:00
pcwd.c isa: Make the remove callback for isa drivers return void 2021-01-26 07:42:27 +01:00
pcwd_pci.c watchdog: Use fallthrough pseudo-keyword 2020-08-05 18:42:53 +02:00
pcwd_usb.c watchdog: pcwd_usb: Avoid GFP_ATOMIC where it is not needed 2020-10-14 15:02:22 +02:00
pic32-dmt.c
pic32-wdt.c
pika_wdt.c compat_ioctl: move WDIOC handling into wdt drivers 2019-10-23 17:23:46 +02:00
pm8916_wdt.c watchdog: pm8916_wdt: Add system sleep callbacks 2020-03-18 11:10:09 +01:00
pnx4008_wdt.c watchdog: pnx4008_wdt: allow compile-testing 2019-09-16 22:10:05 +02:00
pretimeout_noop.c
pretimeout_panic.c
qcom-wdt.c watchdog: qcom: Move suspend/resume to suspend_late/resume_early 2021-06-21 08:49:12 +02:00
rave-sp-wdt.c
rc32434_wdt.c watchdog: Use fallthrough pseudo-keyword 2020-08-05 18:42:53 +02:00
rdc321x_wdt.c drivers: watchdog: rdc321x_wdt: Fix race condition bugs 2020-10-14 15:02:21 +02:00
renesas_wdt.c watchdog: renesas_wdt: add grace period before rebooting 2021-02-07 14:41:22 +01:00
retu_wdt.c watchdog: retu_wdt: Clean-up by using managed work init 2021-03-23 15:22:40 +01:00
riowd.c module: remove never implemented MODULE_SUPPORTED_DEVICE 2021-03-17 13:16:18 -07:00
rn5t618_wdt.c watchdog: rn5t618_wdt: fix module aliases 2019-12-30 15:58:29 +01:00
rt2880_wdt.c
rtd119x_wdt.c
rti_wdt.c watchdog: rti-wdt: fix reference leak in rti_wdt_probe 2020-12-13 16:17:40 +01:00
rza_wdt.c
s3c2410_wdt.c
sa1100_wdt.c watchdog: Use fallthrough pseudo-keyword 2020-08-05 18:42:53 +02:00
sama5d4_wdt.c watchdog: sama5d4_wdt: addition of sam9x60 compatible watchdog 2020-01-27 15:55:44 +01:00
sb_wdog.c watchdog: Use fallthrough pseudo-keyword 2020-08-05 18:42:53 +02:00
sbc60xxwdt.c watchdog: Fix possible use-after-free in wdt_startup() 2021-06-21 08:48:59 +02:00
sbc7240_wdt.c watchdog: Use fallthrough pseudo-keyword 2020-08-05 18:42:53 +02:00
sbc8360.c watchdog: convert remaining drivers to use SPDX license identifier 2019-07-08 20:35:11 +02:00
sbc_epx_c3.c compat_ioctl: move WDIOC handling into wdt drivers 2019-10-23 17:23:46 +02:00
sbc_fitpc2_wdt.c watchdog: sbc_fitpc2_wdt: add __user annotations 2020-12-13 16:17:41 +01:00
sbsa_gwdt.c watchdog: sbsa: Support architecture version 1 2021-06-21 08:48:58 +02:00
sc520_wdt.c watchdog: sc520_wdt: Fix possible use-after-free in wdt_turnoff() 2021-06-21 08:49:02 +02:00
sc1200wdt.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
sch311x_wdt.c watchdog: Use fallthrough pseudo-keyword 2020-08-05 18:42:53 +02:00
scx200_wdt.c watchdog: scx200_wdt: Use fallthrough pseudo-keyword 2020-08-05 18:42:54 +02:00
shwdt.c
sl28cpld_wdt.c watchdog: sl28cpld_wdt: Fix a typo 2021-06-21 08:49:08 +02:00
smsc37b787_wdt.c watchdog: Use fallthrough pseudo-keyword 2020-08-05 18:42:53 +02:00
softdog.c watchdog: softdog: Add options 'soft_reboot_cmd' and 'soft_active_on_boot' 2020-08-05 18:43:02 +02:00
sp805_wdt.c watchdog: sp805: Fix kernel doc description 2021-06-21 08:49:01 +02:00
sp5100_tco.c watchdog: sp5100_tco: Enable watchdog on Family 17h devices if disabled 2020-10-14 15:22:57 +02:00
sp5100_tco.h watchdog: sp5100: Fix definition of EFCH_PM_DECODEEN3 2020-10-14 15:22:57 +02:00
sprd_wdt.c watchdog: sprd: change to use usleep_range() instead of busy loop 2020-12-13 16:17:39 +01:00
st_lpc_wdt.c
stm32_iwdg.c watchdog: stm32_iwdg: don't print an error on probe deferral 2020-12-13 16:17:39 +01:00
stmp3xxx_rtc_wdt.c
stpmic1_wdt.c
sun4v_wdt.c
sunxi_wdt.c watchdog: sunxi_wdt: fix improper error exit code 2020-08-05 18:42:46 +02:00
tegra_wdt.c
tqmx86_wdt.c
ts72xx_wdt.c
ts4800_wdt.c
twl4030_wdt.c
txx9wdt.c
uniphier_wdt.c
ux500_wdt.c
via_wdt.c
visconti_wdt.c watchdog: Add Toshiba Visconti watchdog driver 2020-10-14 15:22:58 +02:00
w83627hf_wdt.c watchdog: w83627hf_wdt: Fix support NCT6116D 2019-12-30 15:58:23 +01:00
w83877f_wdt.c watchdog: Fix possible use-after-free by calling del_timer_sync() 2021-06-21 08:49:03 +02:00
w83977f_wdt.c watchdog: Use fallthrough pseudo-keyword 2020-08-05 18:42:53 +02:00
wafer5823wdt.c watchdog: Use fallthrough pseudo-keyword 2020-08-05 18:42:53 +02:00
watchdog_core.c watchdog: stop wdd when watchdog hw running in reboot_notifier 2021-02-07 14:41:21 +01:00
watchdog_core.h watchdog: convert remaining drivers to use SPDX license identifier 2019-07-08 20:35:11 +02:00
watchdog_dev.c watchdog: Use sysfs_emit() and sysfs_emit_at() in "show" functions 2021-06-21 08:49:03 +02:00
watchdog_pretimeout.c watchdog: Use sysfs_emit() and sysfs_emit_at() in "show" functions 2021-06-21 08:49:03 +02:00
watchdog_pretimeout.h
wd501p.h watchdog: convert remaining drivers to use SPDX license identifier 2019-07-08 20:35:11 +02:00
wdat_wdt.c watchdog: wdat_wdg: fix typo 2021-06-21 08:49:09 +02:00
wdrtas.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
wdt.c watchdog: fix syntactic kernel-doc issues 2021-06-21 08:49:09 +02:00
wdt285.c watchdog: Use fallthrough pseudo-keyword 2020-08-05 18:42:53 +02:00
wdt977.c watchdog: Use fallthrough pseudo-keyword 2020-08-05 18:42:53 +02:00
wdt_pci.c watchdog: fix syntactic kernel-doc issues 2021-06-21 08:49:09 +02:00
wm831x_wdt.c watchdog: wm831x_wdt: Remove GPIO handling 2020-03-18 11:15:24 +01:00
wm8350_wdt.c
xen_wdt.c
ziirave_wdt.c watchdog: Use sysfs_emit() and sysfs_emit_at() in "show" functions 2021-06-21 08:49:03 +02:00