linux-kernel - [S390] cio: css_probe_device() must be called enabled.

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Message-ID: <20061026090201.GB16270@skybase>
Date:	Thu, 26 Oct 2006 11:02:01 +0200
From:	Martin Schwidefsky <schwidefsky@...ibm.com>
To:	linux-kernel@...r.kernel.org, cornelia.huck@...ibm.com
Subject: [S390] cio: css_probe_device() must be called enabled.

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

[S390] cio: css_probe_device() must be called enabled.

Move css_probe_device() behind giving up the lock for the old subchannel
in css_evaluate_known_subchannel() so we aren't disabled when we call it.

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

 drivers/s390/cio/css.c |    7 +++----
 1 files changed, 3 insertions(+), 4 deletions(-)

diff -urpN linux-2.6/drivers/s390/cio/css.c linux-2.6-patched/drivers/s390/cio/css.c
--- linux-2.6/drivers/s390/cio/css.c	2006-10-26 10:43:46.000000000 +0200
+++ linux-2.6-patched/drivers/s390/cio/css.c	2006-10-26 10:44:03.000000000 +0200
@@ -271,10 +271,6 @@ static int css_evaluate_known_subchannel
 		/* Reset intparm to zeroes. */
 		sch->schib.pmcw.intparm = 0;
 		cio_modify(sch);
-
-		/* Probe if necessary. */
-		if (action == UNREGISTER_PROBE)
-			ret = css_probe_device(sch->schid);
 		break;
 	case REPROBE:
 		device_trigger_reprobe(sch);
@@ -283,6 +279,9 @@ static int css_evaluate_known_subchannel
 		break;
 	}
 	spin_unlock_irqrestore(&sch->lock, flags);
+	/* Probe if necessary. */
+	if (action == UNREGISTER_PROBE)
+		ret = css_probe_device(sch->schid);
 
 	return ret;
 }
-
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