From: Ville Syrjälä <[email protected]>

If there's a blocking vblank wait in progress while the vblank interrupt
gets disabled, the current code will just let the vblank wait time out.
Instead make it return immediately when vblank interrupts get disabled.

Signed-off-by: Ville Syrjälä <[email protected]>
Signed-off-by: Daniel Vetter <[email protected]>
---
 drivers/gpu/drm/drm_irq.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c
index 90c59a8c820f..13d671ed3421 100644
--- a/drivers/gpu/drm/drm_irq.c
+++ b/drivers/gpu/drm/drm_irq.c
@@ -1189,6 +1189,7 @@ int drm_wait_vblank(struct drm_device *dev, void *data,
        DRM_WAIT_ON(ret, dev->vblank[crtc].queue, 3 * HZ,
                    (((drm_vblank_count(dev, crtc) -
                       vblwait->request.sequence) <= (1 << 23)) ||
+                    !dev->vblank[crtc].enabled ||
                     !dev->irq_enabled));
 
        if (ret != -EINTR) {
-- 
1.8.3.1

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