Patch '5edb0c9b Fix deadlock with display during hanged ring recovery'
was accidentaly removed during one of DALs code merges.
Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@xxxxxxx>
---
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 19 +++++++++++++------
1 file changed, 13 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 0648794..27e0383 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -5138,14 +5138,21 @@ static void amdgpu_dm_commit_planes(struct drm_atomic_state *state,
*/
abo = gem_to_amdgpu_bo(fb->obj[0]);
r = amdgpu_bo_reserve(abo, true);
- if (unlikely(r != 0)) {
+ if (unlikely(r != 0))
DRM_ERROR("failed to reserve buffer before flip\n");
- WARN_ON(1);
- }
- /* Wait for all fences on this FB */
- WARN_ON(reservation_object_wait_timeout_rcu(abo->tbo.resv, true, false,
- MAX_SCHEDULE_TIMEOUT) < 0);
+ /*
+ * Wait for all fences on this FB. Do limited wait to avoid
+ * deadlock during GPU reset when this fence will not signal
+ * but we hold reservation lock for the BO.
+ */
+ r = reservation_object_wait_timeout_rcu(abo->tbo.resv,
+ true, false,
+ msecs_to_jiffies(5000));
+ if (unlikely(r == 0))
+ DRM_ERROR("Waiting for fences timed out.");
+
+
amdgpu_bo_get_tiling_flags(abo, &tiling_flags);
--
2.7.4
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