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drm/msm/dpu: Add check for pstates

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[ Upstream commit 93340e10b9c5fc86730d149636e0aa8b47bb5a34 ]

As kzalloc may fail and return NULL pointer,
it should be better to check pstates
in order to avoid the NULL pointer dereference.

Fixes: 25fdd5933e ("drm/msm: Add SDM845 DPU support")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Patchwork: https://patchwork.freedesktop.org/patch/514160/
Link: https://lore.kernel.org/r/20221206080236.43687-1-jiasheng@iscas.ac.cn
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jiasheng Jiang
2022-12-06 16:02:36 +08:00
committed by Greg Kroah-Hartman
parent 31f2f8de0e
commit e9743b3052
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
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@@ -834,6 +834,8 @@ static int dpu_crtc_atomic_check(struct drm_crtc *crtc,
struct drm_rect crtc_rect = { 0 };
pstates = kzalloc(sizeof(*pstates) * DPU_STAGE_MAX * 4, GFP_KERNEL);
if (!pstates)
return -ENOMEM;
if (!state->enable || !state->active) {
DPU_DEBUG("crtc%d -> enable %d, active %d, skip atomic_check\n",