NFSv4: nfs_inode_evict_delegation() should set NFS_DELEGATION_RETURNING

In particular, the pnfs return-on-close code will check for that flag,
so ensure we set it appropriately.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>

fs/nfs/delegation.c

@@ -607,6 +607,7 @@ void nfs_inode_evict_delegation(struct inode *inode)
 
 	delegation = nfs_inode_detach_delegation(inode);
 	if (delegation != NULL) {
+		set_bit(NFS_DELEGATION_RETURNING, &delegation->flags);
 		set_bit(NFS_DELEGATION_INODE_FREEING, &delegation->flags);
 		nfs_do_return_delegation(inode, delegation, 1);
 		nfs_free_delegation(delegation);