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drm/amd/display: fix dereferencing possible ERR_PTR()

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This patch fixes static checker warning caused by
"36cc549d5986: "drm/amd/display: disable CRTCs with
NULL FB on their primary plane (V2)"

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Shirish S <shirish.s@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Shirish S 2018-03-15 16:01:00 +05:30 committed by Alex Deucher
parent 219be9dda6
commit cd2d6c92a8
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
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@ -4794,6 +4794,9 @@ static int dm_atomic_check_plane_state_fb(struct drm_atomic_state *state,
return -EDEADLK;
crtc_state = drm_atomic_get_crtc_state(plane_state->state, crtc);
if (IS_ERR(crtc_state))
return PTR_ERR(crtc_state);
if (crtc->primary == plane && crtc_state->active) {
if (!plane_state->fb)
return -EINVAL;