linux-kernel - Re: [RFC PATCH v6 3/3] arm: fix a migrating irq bug when hotplug cpu

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Message-ID: <20151013192824.GL32532@n2100.arm.linux.org.uk>
Date:	Tue, 13 Oct 2015 20:28:24 +0100
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Yang Yingliang <yangyingliang@...wei.com>
Cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Jiang Liu <jiang.liu@...ux.intel.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Marc Zyngier <marc.zyngier@....com>,
	Mark Rutland <mark.rutland@....com>,
	Will Deacon <will.deacon@....com>,
	Hanjun Guo <hanjun.guo@...aro.org>
Subject: Re: [RFC PATCH v6 3/3] arm: fix a migrating irq bug when hotplug cpu

On Thu, Sep 24, 2015 at 05:32:15PM +0800, Yang Yingliang wrote:
> When cpu is disabled, all irqs will be migratged to another cpu.
> In some cases, a new affinity is different, the old affinity need
> to be updated and if irq_set_affinity's return value is IRQ_SET_MASK_OK_DONE,
> the old affinity can not be updated. Fix it by using irq_do_set_affinity.
> 
> And migrating interrupts is a core code matter, so use the generic
> function irq_migrate_all_off_this_cpu() to migrate interrupts in
> kernel/irq/migration.c.

Please can you put this patch in the patch system so I don't forget it
(it's taken tglx prompting and quite a long time to find this in my
mailbox already.)

See http:/www.arm.linux.org.uk/developer/patches/

Thanks.

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