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@xxxxxxxxxxxxxxx
Fixes: dec92020671c ("drm: Use the state pointer directly in planes atomic_check")
Signed-off-by: Ma Ke <make24@xxxxxxxxxxx>
---
drivers/gpu/drm/sti/sti_cursor.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/sti/sti_cursor.c b/drivers/gpu/drm/sti/sti_cursor.c
index db0a1eb53532..e460f5ba2d87 100644
--- a/drivers/gpu/drm/sti/sti_cursor.c
+++ b/drivers/gpu/drm/sti/sti_cursor.c
@@ -200,6 +200,8 @@ static int sti_cursor_atomic_check(struct drm_plane *drm_plane,
return 0;
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;
--
2.25.1
