6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Ma Ke <make24@xxxxxxxxxxx>
commit e965e771b069421c233d674c3c8cd8c7f7245f42 upstream.
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: dd86dc2f9ae1 ("drm/sti: implement atomic_check for the planes")
Signed-off-by: Ma Ke <make24@xxxxxxxxxxx>
Acked-by: Alain Volmat <alain.volmat@xxxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20240909063359.1197065-1-make24@xxxxxxxxxxx
Signed-off-by: Alain Volmat <alain.volmat@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/sti/sti_gdp.c | 3 +++
1 file changed, 3 insertions(+)
--- 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 d
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;
