[Intel-gfx] [PATCH] drm/i915: Filter wake_flags passed to default_wake_function

[Matthew Auld]

On 23/07/2020 20:51, Chris Wilson wrote:
> The flags passed to the wait_entry.func are passed onwards to
> try_to_wake_up(), which has a very particular interpretation for its
> wake_flags. In particular, beyond the published WF_SYNC, it has a few
> internal flags as well. Since we passed the fence->error down the chain
> via the flags argument, these ended up in the default_wake_function
> confusing the kernel/sched.
> 
> Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/2110
> Fixes: ef4688497512 ("drm/i915: Propagate fence errors")
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
> Cc: Matthew Auld <matthew.auld at intel.com>
> Cc: <stable at vger.kernel.org> # v5.4+

Reviewed-by: Matthew Auld <matthew.auld at intel.com>