[Freedreno] [PATCH] drm/msm: Fix null pointer dereference on pointer edp

[Colin King]

From: Colin Ian King <colin.k...@canonical.com>

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: ab5b0107ccf3 ("drm/msm: Initial add eDP support in msm drm driver (v5)")
Signed-off-by: Colin Ian King <colin.k...@canonical.com>
---
 drivers/gpu/drm/msm/edp/edp_ctrl.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/edp/edp_ctrl.c 
b/drivers/gpu/drm/msm/edp/edp_ctrl.c
index 4fb397ee7c84..fe1366b4c49f 100644
--- a/drivers/gpu/drm/msm/edp/edp_ctrl.c
+++ b/drivers/gpu/drm/msm/edp/edp_ctrl.c
@@ -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;
-- 
2.32.0