From: Frank Pavlic <pavlic@de.ibm.com>
Date: Thu, 12 May 2005 18:35:57 +0000 (+0200)
Subject: [PATCH] s390: set online race in the lcs driver
X-Git-Tag: v2.6.12-rc6~145^2~4^2~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b5f9d55b64a5c7193f8965c90ba62244ea3180b2;p=pandora-kernel.git

[PATCH] s390: set online race in the lcs driver

[patch 3/10] s390: set online race in the lcs driver.

From: Michael Holzheu <holzheu@de.ibm.com>

There is a race between lcs_stopcard() and lcs_open_device() which
can lead to the error 'lcs: Error in starting channel, rc=-16'.
lcs_open_device() is invoked when 'ifconfig up' is called due to a
hotplug event, which is caused by register_netdev(). In parallel
lcs_stopcard() is executed. Both functions are sending lcs commands.
The second invocation fails with -EBUSY (-16) as return value.
Move invocation of register_netdev() after invocation of lcs_stopcard
to avoid the race.

Signed-off-by: Frank Pavlic <pavlic@de.ibm.com>
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