From: Ursula Braun <braunu@de.ibm.com>
Date: Tue, 19 Feb 2008 14:29:35 +0000 (+0100)
Subject: [S390] qdio: FCP/SCSI write I/O stagnates on LPAR
X-Git-Tag: v2.6.25-rc3~121^2
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e5fa443ea05f71b5253818890c6d32174cbab36f;p=linux-2.6

[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: Ursula Braun <braunu@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---

diff --git a/drivers/s390/cio/qdio.c b/drivers/s390/cio/qdio.c
index cd9cfc1326..2b5bfb7c69 100644
--- a/drivers/s390/cio/qdio.c
+++ b/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;