[PATCH] drm/exynos: add error check routine in exynos_drm_open

[Seung-Woo Kim]

From: YoungJun Cho <yj44....@samsung.com>

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 at samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park at samsung.com>
---
 drivers/gpu/drm/exynos/exynos_drm_drv.c |    9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.c 
b/drivers/gpu/drm/exynos/exynos_drm_drv.c
index 2762373..ca2729a 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,
-- 
1.7.9.5