NFS: Change initial mount authflavor only when server returns NFS4ERR_WRONGSEC

When attempting an initial mount, we should only attempt other
authflavors if AUTH_UNIX receives a NFS4ERR_WRONGSEC error.
This allows other errors to be passed back to userspace programs.

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index dfd1e6d..9bf41ea 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -2204,8 +2204,6 @@
 		goto out;
 	}
 	ret = nfs4_lookup_root(server, fhandle, info);
-	if (ret < 0)
-		ret = -EAGAIN;
 out:
 	return ret;
 }
@@ -2226,7 +2224,7 @@
 
 	for (i = 0; i < len; i++) {
 		status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
-		if (status == 0)
+		if (status != -EPERM)
 			break;
 	}
 	if (status == 0)