[S390] qdio: FCP/SCSI write I/O stagnates on LPAR

If running on LPAR, qdio might overlook an incoming buffer in certain
scenarios. The patch makes sure that incoming buffers are detected
immediately in all situations.
Signed-off-by: NUrsula Braun <braunu@de.ibm.com>
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>

drivers/s390/cio/qdio.c

@@ -1215,9 +1215,6 @@ tiqdio_is_inbound_q_done(struct qdio_q *q)
 
 	if (!no_used)
 		return 1;
-	if (!q->siga_sync && !irq->is_qebsm)
-		/* we'll check for more primed buffers in qeth_stop_polling */
-		return 0;
 	if (irq->is_qebsm) {
 		count = 1;
 		start_buf = q->first_to_check;