3 files changed, 16 insertions, 2 deletions

diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 460d87b7cda0..fae765dac934 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -835,13 +835,21 @@ cifs_posix_lock_set(struct file *file, struct file_lock *flock)
         if ((flock->fl_flags & FL_POSIX) == 0)
                 return rc;
 
+try_again:
         mutex_lock(&cinode->lock_mutex);
         if (!cinode->can_cache_brlcks) {
                 mutex_unlock(&cinode->lock_mutex);
                 return rc;
         }
-        rc = posix_lock_file_wait(file, flock);
+
+        rc = posix_lock_file(file, flock, NULL);
         mutex_unlock(&cinode->lock_mutex);
+        if (rc == FILE_LOCK_DEFERRED) {
+                rc = wait_event_interruptible(flock->fl_wait, !flock->fl_next);
+                if (!rc)
+                        goto try_again;
+                locks_delete_block(flock);
+        }
         return rc;
 }
 
diff --git a/fs/locks.c b/fs/locks.c
index 637694bf3a03..0d68f1f81799 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -510,12 +510,13 @@ static void __locks_delete_block(struct file_lock *waiter)
 
 /*
  */
-static void locks_delete_block(struct file_lock *waiter)
+void locks_delete_block(struct file_lock *waiter)
 {
         lock_flocks();
         __locks_delete_block(waiter);
         unlock_flocks();
 }
+EXPORT_SYMBOL(locks_delete_block);
 
 /* Insert waiter into blocker's block list.
  * We use a circular list so that processes can be easily woken up in
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 135693e79f2b..528611843ba0 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1215,6 +1215,7 @@ extern int vfs_setlease(struct file *, long, struct file_lock **);
 extern int lease_modify(struct file_lock **, int);
 extern int lock_may_read(struct inode *, loff_t start, unsigned long count);
 extern int lock_may_write(struct inode *, loff_t start, unsigned long count);
+extern void locks_delete_block(struct file_lock *waiter);
 extern void lock_flocks(void);
 extern void unlock_flocks(void);
 #else /* !CONFIG_FILE_LOCKING */
@@ -1359,6 +1360,10 @@ static inline int lock_may_write(struct inode *inode, loff_t start,
         return 1;
 }
 
+static inline void locks_delete_block(struct file_lock *waiter)
+{
+}
+
 static inline void lock_flocks(void)
 {
 }