cifs: handle lease F_UNLCK requests properly

Currently any F_UNLCK request for a lease just gets back -EAGAIN. Allow
them to go immediately to generic_setlease instead.

Signed-off-by: Jeff Layton <jlayton@primarydata.com>
Signed-off-by: Steve French <smfrench@gmail.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 888398067420..0a4a4d7d407e 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -812,8 +812,9 @@ static int cifs_setlease(struct file *file, long arg, struct file_lock **lease)
         if (!(S_ISREG(inode->i_mode)))
                 return -EINVAL;
 
-        /* check if file is oplocked */
-        if (((arg == F_RDLCK) && CIFS_CACHE_READ(CIFS_I(inode))) ||
+        /* Check if file is oplocked if this is request for new lease */
+        if (arg == F_UNLCK ||
+            ((arg == F_RDLCK) && CIFS_CACHE_READ(CIFS_I(inode))) ||
             ((arg == F_WRLCK) && CIFS_CACHE_WRITE(CIFS_I(inode))))
                 return generic_setlease(file, arg, lease);
         else if (tlink_tcon(cfile->tlink)->local_lease &&