smb3: Add debug message later in smb2/smb3 reconnect path

As we reset credits later in the reconnect path, useful
to have optional (cifsFYI) debug message.
Signed-off-by: NSteve French <stfrench@microsoft.com>
Reviewed-by: NPavel Shilovsky <pshilov@microsoft.com>

fs/cifs/connect.c

@@ -347,7 +347,7 @@ cifs_reconnect(struct TCP_Server_Info *server)
 	server->maxBuf = 0;
 	server->max_read = 0;
 
-	cifs_dbg(FYI, "Reconnecting tcp session\n");
+	cifs_dbg(FYI, "Mark tcp session as need reconnect\n");
 	trace_smb3_reconnect(server->CurrentMid, server->hostname);
 
 	/* before reconnecting the tcp session, mark the smb session (uid)

fs/cifs/smb2ops.c

@@ -113,6 +113,9 @@ smb2_set_credits(struct TCP_Server_Info *server, const int val)
 	if (val == 1)
 		server->reconnect_instance++;
 	spin_unlock(&server->req_lock);
+	/* don't log while holding the lock */
+	if (val == 1)
+		cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n");
 }
 
 static int *