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| author |   Jiasheng Jiang <jiasheng@iscas.ac.cn> | 2022-12-06 16:05:17 +0800 |
|---|---|---|
| committer |   Dmitry Baryshkov <dmitry.baryshkov@linaro.org> | 2023-01-24 10:24:07 +0200 |
| commit | c96988b7d99327bb08bd9efd29a203b22cd88ace (patch) | |
| tree | fa32162ba5a064030f5d644b775cafc5d19aa497 /drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c | |
| parent | drm/msm/dpu: fix sm8450 CTL configuration (diff) | |
| download | wireguard-linux-c96988b7d99327bb08bd9efd29a203b22cd88ace.tar.xz wireguard-linux-c96988b7d99327bb08bd9efd29a203b22cd88ace.zip | |
drm/msm/dpu: Add check for cstate
As kzalloc may fail and return NULL pointer,
it should be better to check cstate
in order to avoid the NULL pointer dereference
in __drm_atomic_helper_crtc_reset.
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: Abhinav Kumar <quic_abhinavk@quicinc.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/514163/
Link: https://lore.kernel.org/r/20221206080517.43786-1-jiasheng@iscas.ac.cn
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Diffstat (limited to '')
| -rw-r--r-- | drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c index 41819039dd5e..175d2557e43c 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c @@ -968,7 +968,10 @@ static void dpu_crtc_reset(struct drm_crtc *crtc) if (crtc->state) dpu_crtc_destroy_state(crtc, crtc->state); - __drm_atomic_helper_crtc_reset(crtc, &cstate->base); + if (cstate) + __drm_atomic_helper_crtc_reset(crtc, &cstate->base); + else + __drm_atomic_helper_crtc_reset(crtc, NULL); } /** |