From: Ursula Braun <braunu@de.ibm.com>
Date: Wed, 29 Aug 2007 09:26:52 +0000 (+0200)
Subject: qeth: ungrouping a device must not be interruptible
X-Git-Tag: v2.6.23-rc5~6^2~8
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d0a34f98d1da66a5b4e02171854e6c04c9916016;p=pandora-kernel.git

qeth: ungrouping a device must not be interruptible

Problem:
A recovery thread must not be active when device is removed.
In qeth_remove_device() an interruptible wait operation is used
to wait until a qeth recovery thread is finished. If a user really
interrupts the ungroup operation of a qeth device while a recovery
is running, cio and qeth are out of sync (device already removed
from cio, but kept in qeth). A following module unload of qeth
results in a kernel OOPS here.

Solution:
Do not allow interruption of ungroup operation to guarantee
finishing of a potentially running qeth recovery thread.

Signed-off-by: Ursula Braun <braunu@de.ibm.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
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