Merge branch 'master' into export-slabh

[mv-sheeva.git] / drivers / gpu / drm / drm_fops.c

diff --git a/drivers/gpu/drm/drm_fops.c b/drivers/gpu/drm/drm_fops.c
index 0d55552e13029c3c14c1f582915d92df394c73db..9d532d7fdf59a8e551233c1c44ef730eb22778ca 100644 (file)
--- a/drivers/gpu/drm/drm_fops.c
+++ b/drivers/gpu/drm/drm_fops.c
@@ -141,14 +141,16 @@ int drm_open(struct inode *inode, struct file *filp)
                spin_unlock(&dev->count_lock);
        }
 out:
-       mutex_lock(&dev->struct_mutex);
-       if (minor->type == DRM_MINOR_LEGACY) {
-               BUG_ON((dev->dev_mapping != NULL) &&
-                       (dev->dev_mapping != inode->i_mapping));
-               if (dev->dev_mapping == NULL)
-                       dev->dev_mapping = inode->i_mapping;
+       if (!retcode) {
+               mutex_lock(&dev->struct_mutex);
+               if (minor->type == DRM_MINOR_LEGACY) {
+                       if (dev->dev_mapping == NULL)
+                               dev->dev_mapping = inode->i_mapping;
+                       else if (dev->dev_mapping != inode->i_mapping)
+                               retcode = -ENODEV;
+               }
+               mutex_unlock(&dev->struct_mutex);
        }
-       mutex_unlock(&dev->struct_mutex);
 
        return retcode;
 }