From c2ba444d1d871d3f6cd3bc5e7d8e19c48c8c02a4 Mon Sep 17 00:00:00 2001
From: Horst Hummel <horst.hummel@de.ibm.com>
Date: Wed, 1 Feb 2006 03:06:37 -0800
Subject: [PATCH] [PATCH] s390: dasd wait for clear i/o interrupt

The sleep_on function clears a running cqr without waiting for the related
interrupt.  This can lead to a panic at the time the interrupt is processed
because the related memory might already be freed.  Wait for clear-interrupt
and de-queue cqr prior to return.

Signed-off-by: Horst Hummel <horst.hummel@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
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