Re: [PATCH] PM: sleep: Add DPM watchdog to late/early/noirq phases

Tzung-Bi Shih <[email protected]>
Newsgroups org.kernel.vger.linux-pm,dev.linux.lists.driver-core,org.kernel.vger.linux-kernel
Message-ID <[email protected]> 
On Fri, Aug 21, 2026 at 10:06:48AM -0700, Mayank Rungta wrote:
> Extend the DPM watchdog to wrap device_suspend_late, device_suspend_noirq,
> device_resume_early, and device_resume_noirq callbacks. If a driver hangs
> during these transitions, the watchdog will fire and dump a stack trace
> to help identify the offending driver.
> 
> To prevent false-positive timeouts, the watchdog is set only after
> waiting for subordinate (during suspend) and superior (during resume)
> devices.
> 
> Signed-off-by: Mayank Rungta <[email protected]>

Reviewed-by: Tzung-Bi Shih <[email protected]>
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