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| author | Jiasheng Jiang <jiasheng@iscas.ac.cn> | 2022-12-06 08:48:19 +0100 |
|---|---|---|
| committer | Dmitry Baryshkov <dmitry.baryshkov@linaro.org> | 2023-01-24 10:45:44 +0100 |
| commit | 13fcfcb2a9a4787fe4e49841d728f6f2e9fa6911 (patch) | |
| tree | 1230f0aef9a4791741c17d9818f91b5d85a08570 /drivers/gpu/drm/msm/disp/mdp5 | |
| parent | drm/msm/dpu: Add check for pstates (diff) | |
| download | linux-13fcfcb2a9a4787fe4e49841d728f6f2e9fa6911.tar.xz linux-13fcfcb2a9a4787fe4e49841d728f6f2e9fa6911.zip | |
drm/msm/mdp5: Add check for kzalloc
As kzalloc may fail and return NULL pointer,
it should be better to check the return value
in order to avoid the NULL pointer dereference.
Fixes: 1cff7440a86e ("drm/msm: Convert to using __drm_atomic_helper_crtc_reset() for reset.")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/514154/
Link: https://lore.kernel.org/r/20221206074819.18134-1-jiasheng@iscas.ac.cn
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Diffstat (limited to 'drivers/gpu/drm/msm/disp/mdp5')
| -rw-r--r-- | drivers/gpu/drm/msm/disp/mdp5/mdp5_crtc.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_crtc.c b/drivers/gpu/drm/msm/disp/mdp5/mdp5_crtc.c index e86421c69bd1..86036dd4e1e8 100644 --- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_crtc.c +++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_crtc.c @@ -1139,7 +1139,10 @@ static void mdp5_crtc_reset(struct drm_crtc *crtc) if (crtc->state) mdp5_crtc_destroy_state(crtc, crtc->state); - __drm_atomic_helper_crtc_reset(crtc, &mdp5_cstate->base); + if (mdp5_cstate) + __drm_atomic_helper_crtc_reset(crtc, &mdp5_cstate->base); + else + __drm_atomic_helper_crtc_reset(crtc, NULL); } static const struct drm_crtc_funcs mdp5_crtc_no_lm_cursor_funcs = { |