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

[Doug Anderson]

Hi,

On Fri, Aug 21, 2026 at 10:06 AM Mayank Rungta <mrungta@xxxxxxxxxx> 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 <mrungta@xxxxxxxxxx>
> ---
> Testing:
> - Tested on an ARM64 SoC (Pixel platform running a 6.18-based kernel with
>   DPM watchdog enabled; Android 6.18 kernel has latest DPM changes
>   backported).
>
>  drivers/base/power/main.c | 25 ++++++++++++++++++++++---
>  1 file changed, 22 insertions(+), 3 deletions(-)

I reviewed this patch for Mayank before he sent it. It seems correct /
useful to me, so I'm happy with:

Reviewed-by: Douglas Anderson <dianders@xxxxxxxxxxxx>