[PATCH v2 1/2] drm/nouveau: Fix WARN_ON in nouveau_fence_context_kill()

[Danilo Krummrich]

On Tue, Apr 15, 2025 at 02:19:00PM +0200, Philipp Stanner wrote:
> Nouveau is mostly designed in a way that it's expected that fences only
> ever get signaled through nouveau_fence_signal(). However, in at least
> one other place, nouveau_fence_done(), can signal fences, too. If that
> happens (race) a signaled fence remains in the pending list for a while,
> until it gets removed by nouveau_fence_update().
> 
> Should nouveau_fence_context_kill() run in the meantime, this would be
> a bug because the function would attempt to set an error code on an
> already signaled fence.
> 
> Have nouveau_fence_context_kill() check for a fence being signaled.
> 
> Cc: <stable at vger.kernel.org> # v5.10+
> Fixes: ea13e5abf807 ("drm/nouveau: signal pending fences when channel has been killed")
> Suggested-by: Christian König <christian.koenig at amd.com>
> Signed-off-by: Philipp Stanner <phasta at kernel.org>

Applied to drm-misc-fixes, thanks!