NFS: Add an asynchronous delegreturn operation for use in nfs_clear_inode

Otherwise, there is a potential deadlock if the last dput() from an NFSv4
close() or other asynchronous operation leads to nfs_clear_inode calling
the synchronous delegreturn.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 5d381cfbfe7e..3f332e54e760 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -1145,7 +1145,7 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
 void nfs4_clear_inode(struct inode *inode)
 {
         /* If we are holding a delegation, return it! */
-        nfs_inode_return_delegation(inode);
+        nfs_inode_return_delegation_noreclaim(inode);
         /* First call standard NFS clear_inode() code */
         nfs_clear_inode(inode);
 }