video: exynos_dp: add missing of_node_put()

of_find_node_by_name() returns a node pointer with refcount incremented,
use of_node_put() on it when done.

of_find_node_by_name() will call of_node_put() against the node pass to
from parameter, thus we also need to call of_node_get(from) before calling
of_find_node_by_name().

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Ajay Kumar <ajaykumar.rs@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 13 insertions, 6 deletions

diff --git a/drivers/video/exynos/exynos_dp_core.c b/drivers/video/exynos/exynos_dp_core.c
index 2d0d144add1b..68385a05cee6 100644
--- a/drivers/video/exynos/exynos_dp_core.c
+++ b/drivers/video/exynos/exynos_dp_core.c
@@ -965,10 +965,11 @@ static struct exynos_dp_platdata *exynos_dp_dt_parse_pdata(struct device *dev)
 
 static int exynos_dp_dt_parse_phydata(struct exynos_dp_device *dp)
 {
-        struct device_node *dp_phy_node;
+        struct device_node *dp_phy_node = of_node_get(dp->dev->of_node);
         u32 phy_base;
+        int ret = 0;
 
-        dp_phy_node = of_find_node_by_name(dp->dev->of_node, "dptx-phy");
+        dp_phy_node = of_find_node_by_name(dp_phy_node, "dptx-phy");
         if (!dp_phy_node) {
                 dev_err(dp->dev, "could not find dptx-phy node\n");
                 return -ENODEV;
@@ -976,22 +977,28 @@ static int exynos_dp_dt_parse_phydata(struct exynos_dp_device *dp)
 
         if (of_property_read_u32(dp_phy_node, "reg", &phy_base)) {
                 dev_err(dp->dev, "faild to get reg for dptx-phy\n");
-                return -EINVAL;
+                ret = -EINVAL;
+                goto err;
         }
 
         if (of_property_read_u32(dp_phy_node, "samsung,enable-mask",
                                 &dp->enable_mask)) {
                 dev_err(dp->dev, "faild to get enable-mask for dptx-phy\n");
-                return -EINVAL;
+                ret = -EINVAL;
+                goto err;
         }
 
         dp->phy_addr = ioremap(phy_base, SZ_4);
         if (!dp->phy_addr) {
                 dev_err(dp->dev, "failed to ioremap dp-phy\n");
-                return -ENOMEM;
+                ret = -ENOMEM;
+                goto err;
         }
 
-        return 0;
+err:
+        of_node_put(dp_phy_node);
+
+        return ret;
 }
 
 static void exynos_dp_phy_init(struct exynos_dp_device *dp)