watchdog: da9062: fix suspend/resume handling of HW_RUNNING watchdog

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da9062_wdt_suspend() and da9062_wdt_resume() only check watchdog_active(),
when the watchdog is left running by the driver sets
WDOG_HW_RUNNING in da9062_wdt_probe() but userspace never opens the
device, so WDOG_ACTIVE remains cleared, the wdt_disable() will not be
executed in da9062_wdt_suspend. In this case, the suspend callback is
a no-op and the watchdog keeps counting during system suspend,
leading to an unexpected system reset.
Check WDOG_HW_RUNNING and wdt->wdd，can fix this issue.

Fixes: f6c98b0838 ("watchdog: da9062: add power management ops")
Cs: stable@vger.kernel.org
Signed-off-by: Li Jun <lijun01@kylinos.cn>
Link: https://patch.msgid.link/20260914062353.582205-1-lijun01@kylinos.cn
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

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Li Jun 2026-09-14 14:23:53 +08:00 • committed by Guenter Roeck

parent 22737cfced

commit 5071122bf5

1 changed files with 2 additions and 2 deletions

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drivers/watchdog/da9062_wdt.c

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