From: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Date: Wed, 6 Feb 2013 15:12:03 +0000 (+0100)
Subject: iucv: fix kernel panic at reboot
X-Git-Tag: v3.9-rc1~111^2~10
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c0048de29d207fe3407360c28a9025891506dd6a;p=pandora-kernel.git

iucv: fix kernel panic at reboot

The iucv base layer is initialized during the registration of the
first iucv handler.  If no handler is registered and the
iucv_reboot_event() notifier is called, a missing check can cause
a kernel panic in iucv_block_cpu().  To solve this issue, check the
IRQ masks invoke iucv_block_cpu() for enabled CPUs only.

Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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