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drm/msm/dpu: invalid parameter check in dpu_setup_dspp_pcc

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[ Upstream commit 170b22234d ]

The function performs a check on the "ctx" input parameter, however, it
is used before the check.

Initialize the "base" variable after the sanity check to avoid a
possible NULL pointer dereference.

Fixes: 4259ff7ae5 ("drm/msm/dpu: add support for pcc color block in dpu driver")
Addresses-Coverity-ID: 1493866 ("Null pointer dereference")
Signed-off-by: José Expósito <jose.exposito89@gmail.com>
Link: https://lore.kernel.org/r/20220109192431.135949-1-jose.exposito89@gmail.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
José Expósito 2022-01-09 20:24:31 +01:00 committed by Greg Kroah-Hartman
parent 0b7d8db87d
commit 93a6e920d8
1 changed files with 9 additions and 2 deletions
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11
drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dspp.c
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@ -26,9 +26,16 @@ static void dpu_setup_dspp_pcc(struct dpu_hw_dspp *ctx,
struct dpu_hw_pcc_cfg *cfg) struct dpu_hw_pcc_cfg *cfg)
{ {
u32 base = ctx->cap->sblk->pcc.base; u32 base;
if (!ctx || !base) { if (!ctx) {
DRM_ERROR("invalid ctx %pK\n", ctx);
return;
}
base = ctx->cap->sblk->pcc.base;
if (!base) {
DRM_ERROR("invalid ctx %pK pcc base 0x%x\n", ctx, base); DRM_ERROR("invalid ctx %pK pcc base 0x%x\n", ctx, base);
return; return;
} }