drm/exynos: add error check routine in exynos_drm_open

When the exynos_drm_subdrv_open() returns error, the file_priv
should be released and file->driver_priv set to NULL.

Signed-off-by: YoungJun Cho <yj44.cho@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

1 files changed, 8 insertions, 1 deletions

diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.c b/drivers/gpu/drm/exynos/exynos_drm_drv.c
index 276237348d1e..ca2729a85129 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_drv.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_drv.c
@@ -155,6 +155,7 @@ static int exynos_drm_unload(struct drm_device *dev)
 static int exynos_drm_open(struct drm_device *dev, struct drm_file *file)
 {
         struct drm_exynos_file_private *file_priv;
+        int ret;
 
         file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL);
         if (!file_priv)
@@ -162,7 +163,13 @@ static int exynos_drm_open(struct drm_device *dev, struct drm_file *file)
 
         file->driver_priv = file_priv;
 
-        return exynos_drm_subdrv_open(dev, file);
+        ret = exynos_drm_subdrv_open(dev, file);
+        if (ret) {
+                kfree(file_priv);
+                file->driver_priv = NULL;
+        }
+
+        return ret;
 }
 
 static void exynos_drm_preclose(struct drm_device *dev,