[Nouveau] nouveau lockdep deadlock report with 5.18-rc6

[Lyude Paul]

On Fri, 2022-05-20 at 13:46 +0200, Computer Enthusiastic wrote:
> Hello,
> 
> Il giorno mer 18 mag 2022 alle ore 19:42 Lyude Paul <lyude at redhat.com>
> ha scritto:
> > 
> > On Tue, 2022-05-17 at 13:10 +0200, Hans de Goede wrote:
> > > Hi All,
> > > I just noticed the below lockdep possible deadlock report with a 5.18-
> > > rc6
> > > kernel on a Dell Latitude E6430 laptop with the following nvidia GPU:
> > > [..]
> I hope not to be off topic in regard to kernel version, otherwise I
> apologize in advance.
> 
> I would like to report that I'm constantly observing a similar, but
> somehow different, lockdep warning (see [1]) in kernels 5.16 and 5.17
> (compiled with lockdep debugging features) every time I activate the
> Suspend To Ram (regardless if STR succeeds or not).

You may be on the right track actually, as so far my investigation has shown
that this bug definitely would have been present around those kernel versions
as well. Trying to come up with a solution for this

> 
> Thanks.
> 
> [1]
> https://gitlab.freedesktop.org/xorg/driver/xf86-video-nouveau/-/issues/547#note_1361411
> 

-- 
Cheers,
 Lyude Paul (she/her)
 Software Engineer at Red Hat