The return value of drm_atomic_get_crtc_state() needs to be checked. To avoid use of error pointer 'crtc_state' in case of the failure.

Cc: stable@vger.kernel.org Fixes: dd86dc2f9ae1 ("drm/sti: implement atomic_check for the planes") Signed-off-by: Ma Ke make24@iscas.ac.cn --- drivers/gpu/drm/sti/sti_gdp.c | 3 +++ 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/sti/sti_gdp.c b/drivers/gpu/drm/sti/sti_gdp.c index 43c72c2604a0..f046f5f7ad25 100644 --- a/drivers/gpu/drm/sti/sti_gdp.c +++ b/drivers/gpu/drm/sti/sti_gdp.c @@ -638,6 +638,9 @@ static int sti_gdp_atomic_check(struct drm_plane *drm_plane,

mixer = to_sti_mixer(crtc); crtc_state = drm_atomic_get_crtc_state(state, crtc); + if (IS_ERR(crtc_state)) + return PTR_ERR(crtc_state); + mode = &crtc_state->mode; dst_x = new_plane_state->crtc_x; dst_y = new_plane_state->crtc_y;