smb: client: get rid of bounds check in SMB2_ioctl_init()

smb2_set_next_command() no longer squashes request iovs into a single
iov, so the bounds check can be dropped.

Cc: David Howells <dhowells@redhat.com>
Signed-off-by: Paulo Alcantara (Red Hat) <pc@manguebit.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

fs/smb/client/smb2pdu.c

@@ -3313,15 +3313,6 @@ SMB2_ioctl_init(struct cifs_tcon *tcon, struct TCP_Server_Info *server,
 		return rc;
 
 	if (indatalen) {
-		unsigned int len;
-
-		if (WARN_ON_ONCE(smb3_encryption_required(tcon) &&
-				 (check_add_overflow(total_len - 1,
-						     ALIGN(indatalen, 8), &len) ||
-				  len > MAX_CIFS_SMALL_BUFFER_SIZE))) {
-			cifs_small_buf_release(req);
-			return -EIO;
-		}
 		/*
 		 * indatalen is usually small at a couple of bytes max, so
 		 * just allocate through generic pool