Re: [BUG] mutex deadlock of dpm_resume() in low memory situation

[Rafael J. Wysocki]

On Wed, Dec 27, 2023 at 7:58 PM Rafael J. Wysocki <rjw@xxxxxxxxxxxxx> wrote:
>
> On Wednesday, December 27, 2023 7:39:20 PM CET Rafael J. Wysocki wrote:
> > On Wednesday, December 27, 2023 5:08:40 PM CET Greg KH wrote:
> > > On Wed, Dec 27, 2023 at 05:42:50PM +0900, Youngmin Nam wrote:
> > > > Could you look into this issue ?
> > >
> > > Can you submit a patch that resolves the issue for you, as you have a
> > > way to actually test this out?  That would be the quickest way to get it
> > > resolved, and to help confirm that this is even an issue at all.
> >
> > Something like the appended patch should be sufficient to address this AFAICS.
> >
> > I haven't tested it yet (will do so shortly), so all of the usual disclaimers
> > apply.
> >
> > I think that it can be split into 2 patches, but for easier testing here
> > it goes in one piece.
>
> Well, please scratch this, it will not handle "async" devices properly.

This

https://lore.kernel.org/linux-pm/6019796.lOV4Wx5bFT@kreacher/

should address the issue properly (it has been lightly tested).

Please give it a go and let me know if it works for you (on top of 6.7-rc7).