The "plane_state" pointer was access before checking if it was NULL.
Avoid a possible NULL pointer dereference by accessing the plane address after the check.
Addresses-Coverity-ID: 1493892 ("Dereference before null check") Fixes: 3f68c01be9a22 ("drm/amd/display: add cyan_skillfish display support") Signed-off-by: José Expósito jose.exposito89@gmail.com Reviewed-by: Harry Wentland harry.wentland@amd.com
---
v2:
- Fix coverity report ID
- Add Reviewed-by tag (thanks to Harry Wentland) --- drivers/gpu/drm/amd/display/dc/dcn201/dcn201_hwseq.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/display/dc/dcn201/dcn201_hwseq.c b/drivers/gpu/drm/amd/display/dc/dcn201/dcn201_hwseq.c index cfd09b3f705e..fe22530242d2 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn201/dcn201_hwseq.c +++ b/drivers/gpu/drm/amd/display/dc/dcn201/dcn201_hwseq.c @@ -134,11 +134,12 @@ void dcn201_update_plane_addr(const struct dc *dc, struct pipe_ctx *pipe_ctx) PHYSICAL_ADDRESS_LOC addr; struct dc_plane_state *plane_state = pipe_ctx->plane_state; struct dce_hwseq *hws = dc->hwseq; - struct dc_plane_address uma = plane_state->address; + struct dc_plane_address uma;
if (plane_state == NULL) return;
+ uma = plane_state->address; addr_patched = patch_address_for_sbs_tb_stereo(pipe_ctx, &addr);
plane_address_in_gpu_space_to_uma(hws, &uma);