nfsd: simplify nfs4_put_deleg_lease calls

Every single caller gets the file out of the delegation, so let's do
that once in nfs4_put_deleg_lease.

Plus we'll need it there for other reasons.
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>

fs/nfsd/nfs4state.c

@@ -875,9 +875,10 @@ nfs4_inc_and_copy_stateid(stateid_t *dst, struct nfs4_stid *stid)
 	spin_unlock(&stid->sc_lock);
 }
 
-static void nfs4_put_deleg_lease(struct nfs4_file *fp)
+static void nfs4_put_deleg_lease(struct nfs4_delegation *dp)
 {
 	struct file *filp = NULL;
+	struct nfs4_file *fp = dp->dl_stid.sc_file;
 
 	WARN_ON_ONCE(!fp->fi_delegees);
 
@@ -992,7 +993,7 @@ static void destroy_delegation(struct nfs4_delegation *dp)
 	spin_unlock(&state_lock);
 	if (unhashed) {
 		put_clnt_odstate(dp->dl_clnt_odstate);
-		nfs4_put_deleg_lease(dp->dl_stid.sc_file);
+		nfs4_put_deleg_lease(dp);
 		nfs4_put_stid(&dp->dl_stid);
 	}
 }
@@ -1004,7 +1005,7 @@ static void revoke_delegation(struct nfs4_delegation *dp)
 	WARN_ON(!list_empty(&dp->dl_recall_lru));
 
 	put_clnt_odstate(dp->dl_clnt_odstate);
-	nfs4_put_deleg_lease(dp->dl_stid.sc_file);
+	nfs4_put_deleg_lease(dp);
 
 	if (clp->cl_minorversion == 0)
 		nfs4_put_stid(&dp->dl_stid);
@@ -1916,7 +1917,7 @@ __destroy_client(struct nfs4_client *clp)
 		dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru);
 		list_del_init(&dp->dl_recall_lru);
 		put_clnt_odstate(dp->dl_clnt_odstate);
-		nfs4_put_deleg_lease(dp->dl_stid.sc_file);
+		nfs4_put_deleg_lease(dp);
 		nfs4_put_stid(&dp->dl_stid);
 	}
 	while (!list_empty(&clp->cl_revoked)) {
@@ -7287,7 +7288,7 @@ nfs4_state_shutdown_net(struct net *net)
 		dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
 		list_del_init(&dp->dl_recall_lru);
 		put_clnt_odstate(dp->dl_clnt_odstate);
-		nfs4_put_deleg_lease(dp->dl_stid.sc_file);
+		nfs4_put_deleg_lease(dp);
 		nfs4_put_stid(&dp->dl_stid);
 	}