drm/msm/mdp: add timeout for irq wait

Make things recover a bit more gracefully if we get stuck with no vblank
irq ever coming.

Signed-off-by: Rob Clark <robdclark@gmail.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/gpu/drm/msm/mdp/mdp_kms.c b/drivers/gpu/drm/msm/mdp/mdp_kms.c
index 3be48f7c36be..03455b64a245 100644
--- a/drivers/gpu/drm/msm/mdp/mdp_kms.c
+++ b/drivers/gpu/drm/msm/mdp/mdp_kms.c
@@ -101,7 +101,8 @@ void mdp_irq_wait(struct mdp_kms *mdp_kms, uint32_t irqmask)
                 .count = 1,
         };
         mdp_irq_register(mdp_kms, &wait.irq);
-        wait_event(wait_event, (wait.count <= 0));
+        wait_event_timeout(wait_event, (wait.count <= 0),
+                        msecs_to_jiffies(100));
         mdp_irq_unregister(mdp_kms, &wait.irq);
 }