linux-kernel - Re: [PATCH] soc: ti: reset irq affinity before freeing irq

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Date:	Thu, 27 Aug 2015 13:34:02 -0500
From:	Nathan Lynch <Nathan_Lynch@...tor.com>
To:	Murali Karicheri <m-karicheri2@...com>
CC:	<ssantosh@...nel.org>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH] soc: ti: reset irq affinity before freeing irq

On 08/27/2015 01:23 PM, Murali Karicheri wrote:
> On 08/27/2015 12:43 PM, Nathan Lynch wrote:
>> On 08/27/2015 10:51 AM, Murali Karicheri wrote:
>>> When using accumulator queue for rx side for network driver, following
>>> warning is seen when doing a reboot command from Linux console. This
>>> is because, affinity value is not reset before calling free_irq(). This
>>> patch fixes this.
>>>
>>> Deconfiguring network interfaces...
>>> [   55.176589] ------------[ cut here ]-----------
>>> [   55.181232] WARNING: CPU: 0 PID: 2081 at kernel/irq/manage.c:1370
>>> __free_irq+0x208/0x214
>>
>> The full content of the warning should be included in the commit
>> message; __free_irq has several potential sources of warning messages,
>> and line 1370 doesn't correspond to any of them in 4.2-rc8.
> 
> The log corresponds to 4.1.x kernel. Corresponding WARN_ONCE is
> 
> #ifdef CONFIG_SMP
>         /* make sure affinity_hint is cleaned up */
>         if (WARN_ON_ONCE(desc->affinity_hint))
>                 desc->affinity_hint = NULL;
> #endif
> 
> Which is line 1922. I can edit to make it 1922. Does that work?

Eh, I guess I wasn't thinking clearly about this clearly when I wrote
that.  (I somehow had the notion that WARN_ON... maybe printed more than
just the file and line number, but that is clearly mistaken.)  I think
your message is fine as is, sorry for the noise.

I don't think changing the line number will make it any easier on future
readers.

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