drm/amdgpu: Fix null pointer issue in amdgpu_cs_wait_any_fence

The array[first] may be null when the fence has already been signaled. BUG: SWDEV-136239 Signed-off-by: Emily Deng <[email protected]> Reviewed-by: Christian König <[email protected]> Signed-off-by: Alex Deucher <[email protected]>
cail · Nov 9, 2017 · cdadab8 · cdadab8
1 parent ab6613b
commit cdadab8
Showing 1 changed file with 5 additions and 2 deletions.
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
@@ -1497,8 +1497,11 @@ static int amdgpu_cs_wait_any_fence(struct amdgpu_device *adev,
 	memset(wait, 0, sizeof(*wait));
 	wait->out.status = (r > 0);
 	wait->out.first_signaled = first;
-	/* set return value 0 to indicate success */
-	r = array[first]->error;
+
+	if (array[first])
+		r = array[first]->error;
+	else
+		r = 0;
 
 err_free_fence_array:
 	for (i = 0; i < fence_count; i++)