From: Thomas Gleixner <tglx@linutronix.de>
Date: Fri, 28 Jan 2011 07:47:15 +0000 (+0100)
Subject: genirq: Prevent irq storm on migration
X-Git-Tag: v2.6.37.1~148
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=212075b89babe1575a770e1b2bf958cf0dcf5bd2;p=pandora-kernel.git

genirq: Prevent irq storm on migration

commit f1a06390d013244e721372b3f9b66e39b6429c71 upstream.

move_native_irq() masks and unmasks the interrupt line
unconditionally, but the interrupt line might be masked due to a
threaded oneshot handler in progress. Unmasking the line in that case
can lead to interrupt storms. Observed on PREEMPT_RT.

Originally-from: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

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