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drm/amd/display: Fix potential nullptr error 

[Why]
Fix surface/plane potential nullptr

[How]
add null check

Signed-off-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Reviewed-by: Aric Cyr <Aric.Cyr@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Bhawanpreet Lakha 2018-10-09 13:47:34 -04:00 committed by Alex Deucher
parent 3384521a79
commit 4f7129112c
1 changed files with 6 additions and 0 deletions
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6
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
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@ -5313,6 +5313,12 @@ enum surface_update_type dm_determine_update_type_for_commit(struct dc *dc, stru
struct dc_stream_update stream_update; struct dc_stream_update stream_update;
enum surface_update_type update_type = UPDATE_TYPE_FAST; enum surface_update_type update_type = UPDATE_TYPE_FAST;
if (!updates || !surface) {
DRM_ERROR("Plane or surface update failed to allocate");
/* Set type to FULL to avoid crashing in DC*/
update_type = UPDATE_TYPE_FULL;
goto ret;
}
for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) { for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
new_dm_crtc_state = to_dm_crtc_state(new_crtc_state); new_dm_crtc_state = to_dm_crtc_state(new_crtc_state);