[Intel-gfx] [PATCH v2 1/3] drm/i915: Wake up pending_flip_queue as part of reset handling

[ville.syrjala at linux.intel.com]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

Someone may be waiting for a flip that will never complete due to a GPU
reset. Wake up all such waiters after the GPU reset processing has
finished.

v2: Dropped the wake_up_all() from i915_handle_error() since
    we no longer wait for pending flips with struct_mutex held.

Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 drivers/gpu/drm/i915/i915_irq.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 2cd97d1..672816a 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -915,6 +915,8 @@ static void i915_error_work_func(struct work_struct *work)
 		for_each_ring(ring, dev_priv, i)
 			wake_up_all(&ring->irq_queue);
 
+		wake_up_all(&dev_priv->pending_flip_queue);
+
 		wake_up_all(&dev_priv->gpu_error.reset_queue);
 	}
 }
-- 
1.7.12.4