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drm/sti: avoid potential dereference of error pointers in sti_hqvdp_atomic_check

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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: dd86dc2f9a ("drm/sti: implement atomic_check for the planes")
Signed-off-by: Ma Ke <make24@iscas.ac.cn>
Link: https://patchwork.freedesktop.org/patch/msgid/20240913090926.2023716-1-make24@iscas.ac.cn
Signed-off-by: Alain Volmat <alain.volmat@foss.st.com>
This commit is contained in:
Ma Ke 2024-09-13 17:09:26 +08:00 committed by Alain Volmat
parent 87054ec004
commit c1ab40a1fd
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/sti/sti_hqvdp.c
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@ -1037,6 +1037,9 @@ static int sti_hqvdp_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;