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drm/msm/mdp5: Add check for kzalloc

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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>
This commit is contained in:
Jiasheng Jiang
2022-12-06 15:48:19 +08:00
committed by Dmitry Baryshkov
parent 93340e10b9
commit 13fcfcb2a9
1 changed files with 4 additions and 1 deletions
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5
drivers/gpu/drm/msm/disp/mdp5/mdp5_crtc.c
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@@ -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 = {