From: Alex Hung <alex.hung@xxxxxxx>
[WHAT & HOW]
amdgpu_dm can pass a null stream to dc_is_stream_unchanged. It is
necessary to check for null before dereferencing them.
This fixes 1 FORWARD_NULL issue reported by Coverity.
Reviewed-by: Rodrigo Siqueira <rodrigo.siqueira@xxxxxxx>
Signed-off-by: Jerry Zuo <jerry.zuo@xxxxxxx>
Signed-off-by: Alex Hung <alex.hung@xxxxxxx>
---
drivers/gpu/drm/amd/display/dc/core/dc_resource.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
index bcb5267b5a6b..83aa3d8a997a 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
@@ -3241,6 +3241,8 @@ static bool are_stream_backends_same(
bool dc_is_stream_unchanged(
struct dc_stream_state *old_stream, struct dc_stream_state *stream)
{
+ if (!old_stream || !stream)
+ return false;
if (!are_stream_backends_same(old_stream, stream))
return false;
--
2.34.1
