smb/server: fix return value of smb2_open()

In most error cases, error code is not returned in smb2_open(),
__process_request() will not print error message.

Fix this by returning the correct value at the end of smb2_open().
Signed-off-by: ChenXiaoSong <chenxiaosong@kylinos.cn>
Acked-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>

fs/smb/server/smb2pdu.c

@@ -3713,7 +3713,7 @@ int smb2_open(struct ksmbd_work *work)
 	kfree(name);
 	kfree(lc);
 
-	return 0;
+	return rc;
 }
 
 static int readdir_info_level_struct_sz(int info_level)