From: Thomas Gleixner <tglx@linutronix.de>
Date: Fri, 7 Nov 2008 12:18:30 +0000 (+0100)
Subject: genirq: keep affinities set from userspace across free/request_irq()
X-Git-Tag: v2.6.28-rc7~42^2~6
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f6d87f4bd259cf33e092cd1a8fde05f291c47af1;p=pandora-kernel.git

genirq: keep affinities set from userspace across free/request_irq()

Impact: preserve user-modified affinities on interrupts

Kumar Galak noticed that commit
18404756765c713a0be4eb1082920c04822ce588 (genirq: Expose default irq
affinity mask (take 3))

overrides an already set affinity setting across a free /
request_irq(). Happens e.g. with ifdown/ifup of a network device.

Change the logic to mark the affinities as set and keep them
intact. This also fixes the unlocked access to irq_desc in
irq_select_affinity() when called from irq_affinity_proc_write()

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

Reading git-diff-tree failed