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drm/i915: Make the lock for pageflips interruptible

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As we take the struct_mutex lock to access the command-stream, there is
a possibility that we may need to wait for a GPU hang and so should make
the lock both interruptible and error-checking.

References: https://bugs.freedesktop.org/show_bug.cgi?id=50069
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Chris Wilson 2012-05-23 11:13:58 +01:00 committed by Daniel Vetter
parent a4f32fc3a3
commit 79158103bf
1 changed files with 4 additions and 1 deletions
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5
drivers/gpu/drm/i915/intel_display.c
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@ -6486,7 +6486,9 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc,
intel_fb = to_intel_framebuffer(fb);
obj = intel_fb->obj;
mutex_lock(&dev->struct_mutex);
ret = i915_mutex_lock_interruptible(dev);
if (ret)
goto cleanup;
/* Reference the objects for the scheduled work. */
drm_gem_object_reference(&work->old_fb_obj->base);
@ -6521,6 +6523,7 @@ cleanup_pending:
drm_gem_object_unreference(&obj->base);
mutex_unlock(&dev->struct_mutex);
cleanup:
spin_lock_irqsave(&dev->event_lock, flags);
intel_crtc->unpin_work = NULL;
spin_unlock_irqrestore(&dev->event_lock, flags);