cifs: return errors during session setup during reconnects

During reconnects, we check the return value from
cifs_negotiate_protocol, and have handlers for both success
and failures. But if that passes, and cifs_setup_session
returns any errors other than -EACCES, we do not handle
that. This fix adds a handler for that, so that we don't
go ahead and try a tree_connect on a failed session.

Signed-off-by: Shyam Prasad N <sprasad@microsoft.com>
Reviewed-by: Enzo Matsumiya <ematsumiya@suse.de>
Cc: stable@vger.kernel.org
Signed-off-by: Steve French <stfrench@microsoft.com>

fs/cifs/smb2pdu.c

@@ -288,6 +288,9 @@ smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon,
 			mutex_unlock(&ses->session_mutex);
 			rc = -EHOSTDOWN;
 			goto failed;
+		} else if (rc) {
+			mutex_unlock(&ses->session_mutex);
+			goto out;
 		}
 	} else {
 		mutex_unlock(&ses->session_mutex);