Avoid kernel oops in some error paths calling drm_lastclose().

diff --git a/linux-core/drm_drv.c b/linux-core/drm_drv.c
index 0281178..79209db 100644 (file)
--- a/linux-core/drm_drv.c
+++ b/linux-core/drm_drv.c
@@ -163,11 +163,13 @@ int drm_lastclose(drm_device_t * dev)
                dev->unique_len = 0;
        }
 
-        list_for_each_entry_safe(pt, next, &dev->magicfree, head) {
-                list_del(&pt->head);
-                drm_ht_remove_item(&dev->magiclist, &pt->hash_item);
-                drm_free(pt, sizeof(*pt), DRM_MEM_MAGIC);
-        }
+       if (dev->magicfree.next) {
+               list_for_each_entry_safe(pt, next, &dev->magicfree, head) {
+                       list_del(&pt->head);
+                       drm_ht_remove_item(&dev->magiclist, &pt->hash_item);
+                       drm_free(pt, sizeof(*pt), DRM_MEM_MAGIC);
+               }
+       }
 
 
        /* Clear AGP information */