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Message-Id: <20230814090616.1853263-1-Meng.Li@windriver.com>
Date: Mon, 14 Aug 2023 17:06:16 +0800
From: Meng Li <Meng.Li@...driver.com>
To: wim@...ux-watchdog.org, linux@...ck-us.net,
linux-watchdog@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, meng.li@...driver.com
Subject: [v2][PATCH] watchdog: core: stop watchdog when executing poweroff command
From: Meng Li <meng.li@...driver.com>
On some platforms, for example, Intel SoC FPGA platform, the watchdog
is started in u-boot, and so kernel will create a timer and work to
keep watchdog alive. But when user executes commands "poweroff" or
"shutdown -h", the system is reset when watchdog triggers timeout even
if WDOG_STOP_ON_REBOOT is set in watchdog driver. The root cause is
that the watchdog is not stopped properly because the SYS_POWER_OFF case
is not supported in notify callback function. So, add this case to stop
watchdog when executing poweroff command.
Signed-off-by: Meng Li <Meng.Li@...driver.com>
---
v2:
- fix typos in commit log
---
drivers/watchdog/watchdog_core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/watchdog/watchdog_core.c b/drivers/watchdog/watchdog_core.c
index d4c5a736fdcb..5b55ccae06d4 100644
--- a/drivers/watchdog/watchdog_core.c
+++ b/drivers/watchdog/watchdog_core.c
@@ -161,7 +161,7 @@ static int watchdog_reboot_notifier(struct notifier_block *nb,
struct watchdog_device *wdd;
wdd = container_of(nb, struct watchdog_device, reboot_nb);
- if (code == SYS_DOWN || code == SYS_HALT) {
+ if (code == SYS_DOWN || code == SYS_HALT || code == SYS_POWER_OFF) {
if (watchdog_hw_running(wdd)) {
int ret;
--
2.17.1
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