[PATCH v3 3/3] drm/i915: Use device wedged event

[Raag Jadav]

On Mon, Sep 02, 2024 at 02:22:21PM +0530, Aravind Iddamsetty wrote:
> 
> On 02/09/24 13:18, Raag Jadav wrote:
> > Now that we have device wedged event supported by DRM core, make use
> > of it. With this in place, userspace will be notified of wedged device
> > on gt reset failure.
> >
> > Signed-off-by: Raag Jadav <raag.jadav at intel.com>
> > ---
> >  drivers/gpu/drm/i915/gt/intel_reset.c | 2 ++
> >  1 file changed, 2 insertions(+)
> >
> > diff --git a/drivers/gpu/drm/i915/gt/intel_reset.c b/drivers/gpu/drm/i915/gt/intel_reset.c
> > index 735cd23a43c6..60d09ec536c4 100644
> > --- a/drivers/gpu/drm/i915/gt/intel_reset.c
> > +++ b/drivers/gpu/drm/i915/gt/intel_reset.c
> > @@ -1409,6 +1409,8 @@ static void intel_gt_reset_global(struct intel_gt *gt,
> >  
> >  	if (!test_bit(I915_WEDGED, &gt->reset.flags))
> >  		kobject_uevent_env(kobj, KOBJ_CHANGE, reset_done_event);
> > +	else
> > +		drm_dev_wedged(&gt->i915->drm);
> >  }
> rather than intel_gt_reset_global, __intel_get_set_wedged looks to be
> an appropriate place where actually the device is declared wedged and
> that would cover all call sites too.

Which is why it may be the appropriate place IMHO.
We'd want to make sure the device is _really_ unrecoverable when we
choose to send the event.

Raag