drm/msm/mdp5: Add check for kzalloc
[ Upstream commit 13fcfcb2a9a4787fe4e49841d728f6f2e9fa6911 ]
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: 1cff7440a8
("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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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@ -1050,7 +1050,10 @@ static void mdp5_crtc_reset(struct drm_crtc *crtc)
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if (crtc->state)
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mdp5_crtc_destroy_state(crtc, crtc->state);
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__drm_atomic_helper_crtc_reset(crtc, &mdp5_cstate->base);
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if (mdp5_cstate)
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__drm_atomic_helper_crtc_reset(crtc, &mdp5_cstate->base);
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else
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__drm_atomic_helper_crtc_reset(crtc, NULL);
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drm_crtc_vblank_reset(crtc);
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}
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