linux-kernel - [S390] cio: Call cancel_halt

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Message-ID: <20070305224249.GK22630@skybase>
Date:	Mon, 5 Mar 2007 23:42:49 +0100
From:	Martin Schwidefsky <schwidefsky@...ibm.com>
To:	linux-kernel@...r.kernel.org, linux-s390@...r.kernel.org
Cc:	cornelia.huck@...ibm.com
Subject: [S390] cio: Call cancel_halt_clear even when actl == 0.

From: Cornelia Huck <cornelia.huck@...ibm.com>

[S390] cio: Call cancel_halt_clear even when actl == 0.

The subchannel may just be status pending, even with actl == 0. We
must go through the cancel_halt_clear procedure to put the subchannel
into a defined state.

Signed-off-by: Cornelia Huck <cornelia.huck@...ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@...ibm.com>
---

 drivers/s390/cio/device_fsm.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff -urpN linux-2.6/drivers/s390/cio/device_fsm.c linux-2.6-patched/drivers/s390/cio/device_fsm.c
--- linux-2.6/drivers/s390/cio/device_fsm.c	2007-03-05 22:51:58.000000000 +0100
+++ linux-2.6-patched/drivers/s390/cio/device_fsm.c	2007-03-05 22:51:58.000000000 +0100
@@ -144,8 +144,8 @@ ccw_device_cancel_halt_clear(struct ccw_
 	ret = stsch(sch->schid, &sch->schib);
 	if (ret || !sch->schib.pmcw.dnv)
 		return -ENODEV; 
-	if (!sch->schib.pmcw.ena || sch->schib.scsw.actl == 0)
-		/* Not operational or no activity -> done. */
+	if (!sch->schib.pmcw.ena)
+		/* Not operational -> done. */
 		return 0;
 	/* Stage 1: cancel io. */
 	if (!(sch->schib.scsw.actl & SCSW_ACTL_HALT_PEND) &&
-
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