scsi: iscsi_tcp: Tell net when there's more data

If we have more data, set the MSG_SENDPAGE_NOTLAST in case we go down the
sendpage path.

Link: https://lore.kernel.org/r/20220616224557.115234-5-michael.christie@oracle.comReviewed-by: Lee Duncan <lduncan@suse.com>
Signed-off-by: Mike Christie <michael.christie@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/iscsi_tcp.c

@@ -306,7 +306,7 @@ static int iscsi_sw_tcp_xmit_segment(struct iscsi_tcp_conn *tcp_conn,
 		copy = segment->size - offset;
 
 		if (segment->total_copied + segment->size < segment->total_size)
-			flags |= MSG_MORE;
+			flags |= MSG_MORE | MSG_SENDPAGE_NOTLAST;
 
 		if (tcp_sw_conn->queue_recv)
 			flags |= MSG_DONTWAIT;