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drm/i915: Mark the overlay active only if we got ring space 

After the GPU has wedged we can't turn on the overlay anymore. Only mark
it as active if we succeed in allocating ring space. This prevents a
WARN (previous;y a BUG) during driver unload if we attempted to use the
overlay after the GPU had already wedged.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Ville Syrjälä 2015-03-31 10:37:24 +03:00 committed by Daniel Vetter
parent 209c2a5ec1
commit 1c7c4301ee
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/drm/i915/intel_overlay.c
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@ -242,14 +242,14 @@ static int intel_overlay_on(struct intel_overlay *overlay)
int ret;
WARN_ON(overlay->active);
overlay->active = true;
WARN_ON(IS_I830(dev) && !(dev_priv->quirks & QUIRK_PIPEA_FORCE));
ret = intel_ring_begin(ring, 4);
if (ret)
return ret;
overlay->active = true;
intel_ring_emit(ring, MI_OVERLAY_FLIP | MI_OVERLAY_ON);
intel_ring_emit(ring, overlay->flip_addr | OFC_UPDATE);
intel_ring_emit(ring, MI_WAIT_FOR_EVENT | MI_WAIT_FOR_OVERLAY_FLIP);