Re: [PATCH v1 0/3] PM: sleep: Fix possible device suspend-resume deadlocks

Rafael J. Wysocki
2024-01-02T13:18:55Z

On Wed, Dec 27, 2023 at 9:41 PM Rafael J. Wysocki <rjw@rjwysocki.net> wrote:
>
> Hi Everyone,
>
> As reported here
>
> https://lore.kernel.org/linux-pm/ZYvjiqX6EsL15moe@perf/
>
> the device suspend-resume code running during system-wide PM transitions
> deadlock on low memory, because it attempts to acquire a mutex that's
> already held by it in those cases.
>
> This series addresses the issue by changing the resume code behavior
> to directly run the device PM functions synchronously if they cannot
> be scheduled for asynchronous executions (patch [3/3]).
>
> For this purpose, the async code is rearranged (patch [1/3]) and a
> new variant of async_schedule_dev() is introduced (patch [2/3]).

Given the lack of negative feedback, I've queued up this series for 6.8-rc1.

Please let me know if there are any issues with that.

Thanks!