linux-kernel - [S390] cio: no path after machine check.

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Message-ID: <20060830124124.GB22276@skybase>
Date:	Wed, 30 Aug 2006 14:41:24 +0200
From:	Martin Schwidefsky <schwidefsky@...ibm.com>
To:	linux-kernel@...r.kernel.org, peter.oberparleiter@...ibm.com
Subject: [S390] cio: no path after machine check.

From: Peter Oberparleiter <peter.oberparleiter@...ibm.com>

[S390] cio: no path after machine check.

Devices enter no-path state after disabling a channel path
via the SE even though another path has been reenabled at the SE.
The devices are set into no-path state before triggering path
verification even though other paths may have become available.
To fix this trigger path verification before setting a device into
no-path state.

Signed-off-by: Peter Oberparleiter <peter.oberparleiter@...ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@...ibm.com>
---

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

diff -urpN linux-2.6/drivers/s390/cio/chsc.c linux-2.6-patched/drivers/s390/cio/chsc.c
--- linux-2.6/drivers/s390/cio/chsc.c	2006-08-30 14:24:34.000000000 +0200
+++ linux-2.6-patched/drivers/s390/cio/chsc.c	2006-08-30 14:24:34.000000000 +0200
@@ -238,8 +238,6 @@ s390_subchannel_remove_chpid(struct devi
 	/* Check for single path devices. */
 	if (sch->schib.pmcw.pim == 0x80)
 		goto out_unreg;
-	if (sch->vpm == mask)
-		goto out_unreg;

 	if ((sch->schib.scsw.actl & SCSW_ACTL_DEVACT) &&
 	    (sch->schib.scsw.actl & SCSW_ACTL_SCHACT) &&
@@ -258,6 +256,8 @@ s390_subchannel_remove_chpid(struct devi
 	/* trigger path verification. */
 	if (sch->driver && sch->driver->verify)
 		sch->driver->verify(&sch->dev);
+	else if (sch->vpm == mask)
+		goto out_unreg;
 out_unlock:
 	spin_unlock_irq(&sch->lock);
 	return 0;
-
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