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drm/msm: Fix null pointer dereference on pointer edp

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commit 2133c4fc8e1348dcb752f267a143fe2254613b34 upstream.

The initialization of pointer dev dereferences pointer edp before
edp is null checked, so there is a potential null pointer deference
issue. Fix this by only dereferencing edp after edp has been null
checked.

Addresses-Coverity: ("Dereference before null check")
Fixes: ab5b0107cc ("drm/msm: Initial add eDP support in msm drm driver (v5)")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20210929121857.213922-1-colin.king@canonical.com
Signed-off-by: Rob Clark <robdclark@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Colin Ian King 2021-09-29 13:18:57 +01:00 committed by Greg Kroah-Hartman
parent a7b45024f6
commit 91a340768b
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/msm/edp/edp_ctrl.c
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@ -1116,7 +1116,7 @@ void msm_edp_ctrl_power(struct edp_ctrl *ctrl, bool on)
int msm_edp_ctrl_init(struct msm_edp *edp)
{
struct edp_ctrl *ctrl = NULL;
struct device *dev = &edp->pdev->dev;
struct device *dev;
int ret;
if (!edp) {
@ -1124,6 +1124,7 @@ int msm_edp_ctrl_init(struct msm_edp *edp)
return -EINVAL;
}
dev = &edp->pdev->dev;
ctrl = devm_kzalloc(dev, sizeof(*ctrl), GFP_KERNEL);
if (!ctrl)
return -ENOMEM;