drm/exynos: Fix (more) freeing issues in exynos_drm_drv.c

The following commit [0] fixed a use-after-free, but left the subdrv open
in the error path.

[0] commit 6ca605f
drm/exynos: Fix freeing issues in exynos_drm_drv.c

Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Acked-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

drivers/gpu/drm/exynos/exynos_drm_drv.c

@@ -172,20 +172,24 @@ static int exynos_drm_open(struct drm_device *dev, struct drm_file *file)
 
  ret = exynos_drm_subdrv_open(dev, file);
  if (ret)
- goto out;
+ goto err_file_priv_free;
 
  anon_filp = anon_inode_getfile("exynos_gem", &exynos_drm_gem_fops,
  NULL, 0);
  if (IS_ERR(anon_filp)) {
  ret = PTR_ERR(anon_filp);
- goto out;
+ goto err_subdrv_close;
  }
 
  anon_filp->f_mode = FMODE_READ | FMODE_WRITE;
  file_priv->anon_filp = anon_filp;
 
  return ret;
-out:
+
+err_subdrv_close:
+ exynos_drm_subdrv_close(dev, file);
+
+err_file_priv_free:
  kfree(file_priv);
  file->driver_priv = NULL;
  return ret;