[Intel-gfx] [PATCH 3/6] 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 when the hang is first detected, and
after the reset processing has finished.

Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 drivers/gpu/drm/i915/i915_irq.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 13bb8d3..8b1146b 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);
 	}
 }
@@ -1540,6 +1542,8 @@ void i915_handle_error(struct drm_device *dev, bool wedged)
 		 */
 		for_each_ring(ring, dev_priv, i)
 			wake_up_all(&ring->irq_queue);
+
+		wake_up_all(&dev_priv->pending_flip_queue);
 	}
 
 	queue_work(dev_priv->wq, &dev_priv->gpu_error.work);
-- 
1.7.12.4