1 files changed, 7 insertions, 3 deletions

diff --git a/fs/sysfs/inode.c b/fs/sysfs/inode.c
index ccb7d722c558..4de5c6b89918 100644
--- a/fs/sysfs/inode.c
+++ b/fs/sysfs/inode.c
@@ -222,13 +222,17 @@ const unsigned char * sysfs_get_name(struct sysfs_dirent *sd)
 
 static inline void orphan_all_buffers(struct inode *node)
 {
-        struct sysfs_buffer_collection *set = node->i_private;
+        struct sysfs_buffer_collection *set;
         struct sysfs_buffer *buf;
 
         mutex_lock_nested(&node->i_mutex, I_MUTEX_CHILD);
-        if (node->i_private) {
-                list_for_each_entry(buf, &set->associates, associates)
+        set = node->i_private;
+        if (set) {
+                list_for_each_entry(buf, &set->associates, associates) {
+                        down(&buf->sem);
                         buf->orphaned = 1;
+                        up(&buf->sem);
+                }
         }
         mutex_unlock(&node->i_mutex);
 }