drm: avoid kernel oops in some error paths calling drm_lastclose
Signed-off-by: Dave Airlie <airlied@linux.ie>
diff --git a/drivers/char/drm/drm_drv.c b/drivers/char/drm/drm_drv.c
index f9ecc84..654b95c 100644
--- a/drivers/char/drm/drm_drv.c
+++ b/drivers/char/drm/drm_drv.c
@@ -155,10 +155,12 @@
del_timer(&dev->timer);
/* Clear pid list */
- 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 */