drm/radeon: don't leave fence blocked process on failed GPU reset

[linux-imx.git] / drivers / gpu / drm / radeon / radeon_fence.c

diff --git a/drivers/gpu/drm/radeon/radeon_fence.c b/drivers/gpu/drm/radeon/radeon_fence.c
index 410a975a8eec8f7e042a608cfcea0d7c274f1932..a9b0fa5608ebdedd5e643b048dd5129c90fa0c87 100644 (file)
--- a/drivers/gpu/drm/radeon/radeon_fence.c
+++ b/drivers/gpu/drm/radeon/radeon_fence.c
@@ -868,6 +868,25 @@ void radeon_fence_driver_fini(struct radeon_device *rdev)
        mutex_unlock(&rdev->ring_lock);
 }
 
+/**
+ * radeon_fence_driver_force_completion - force all fence waiter to complete
+ *
+ * @rdev: radeon device pointer
+ *
+ * In case of GPU reset failure make sure no process keep waiting on fence
+ * that will never complete.
+ */
+void radeon_fence_driver_force_completion(struct radeon_device *rdev)
+{
+       int ring;
+
+       for (ring = 0; ring < RADEON_NUM_RINGS; ring++) {
+               if (!rdev->fence_drv[ring].initialized)
+                       continue;
+               radeon_fence_write(rdev, rdev->fence_drv[ring].sync_seq[ring], ring);
+       }
+}
+
 
 /*
  * Fence debugfs