drm/amd/display: fix dereferencing possible ERR_PTR()
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>
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@ -4794,6 +4794,9 @@ static int dm_atomic_check_plane_state_fb(struct drm_atomic_state *state,
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return -EDEADLK;
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crtc_state = drm_atomic_get_crtc_state(plane_state->state, crtc);
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if (IS_ERR(crtc_state))
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return PTR_ERR(crtc_state);
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if (crtc->primary == plane && crtc_state->active) {
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if (!plane_state->fb)
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return -EINVAL;
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