drm/msm/dpu: Fix memory leak in msm_mdss_parse_data_bus_icc_path

[ Upstream commit 45dac1352b55b1d8cb17f218936b2bc2bc1fb4ee ]

of_icc_get() alloc resources for path1, we should release it when not
need anymore. Early return when IS_ERR_OR_NULL(path0) may leak path1.
Defer getting path1 to fix this.

Fixes: b9364eed9232 ("drm/msm/dpu: Move min BW request and full BW disable back to mdss")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Patchwork: https://patchwork.freedesktop.org/patch/514264/
Link: https://lore.kernel.org/r/20221207065922.2086368-1-linmq006@gmail.com
Signed-off-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/gpu/drm/msm/msm_mdss.c b/drivers/gpu/drm/msm/msm_mdss.c
index e13c5c1..3b8d699 100644 (file)
--- a/drivers/gpu/drm/msm/msm_mdss.c
+++ b/drivers/gpu/drm/msm/msm_mdss.c
@@ -46,15 +46,17 @@ struct msm_mdss {
 static int msm_mdss_parse_data_bus_icc_path(struct device *dev,
                                            struct msm_mdss *msm_mdss)
 {
-       struct icc_path *path0 = of_icc_get(dev, "mdp0-mem");
-       struct icc_path *path1 = of_icc_get(dev, "mdp1-mem");
+       struct icc_path *path0;
+       struct icc_path *path1;
 
+       path0 = of_icc_get(dev, "mdp0-mem");
        if (IS_ERR_OR_NULL(path0))
                return PTR_ERR_OR_ZERO(path0);
 
        msm_mdss->path[0] = path0;
        msm_mdss->num_paths = 1;
 
+       path1 = of_icc_get(dev, "mdp1-mem");
        if (!IS_ERR_OR_NULL(path1)) {
                msm_mdss->path[1] = path1;
                msm_mdss->num_paths++;