Commit c96988b7 authored by 蒋家盛's avatar 蒋家盛 Committed by Dmitry Baryshkov
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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: 1cff7440 ("drm/msm: Convert to using __drm_atomic_helper_crtc_reset() for reset.")
Signed-off-by: default avatarJiasheng Jiang <jiasheng@iscas.ac.cn>
Reviewed-by: default avatarAbhinav Kumar <quic_abhinavk@quicinc.com>
Reviewed-by: default avatarDmitry 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: default avatarDmitry Baryshkov <dmitry.baryshkov@linaro.org>
parent 6c021d77

drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c

+4 −1
Original line number Diff line number Diff line
@@ -968,7 +968,10 @@ static void dpu_crtc_reset(struct drm_crtc *crtc) 
	if (crtc->state)

		dpu_crtc_destroy_state(crtc, crtc->state);



	if (cstate)

		__drm_atomic_helper_crtc_reset(crtc, &cstate->base);

	else

		__drm_atomic_helper_crtc_reset(crtc, NULL);

}



/**