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

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Date:	Thu, 27 Aug 2015 17:43:47 -0400
From:	Murali Karicheri <m-karicheri2@...com>
To:	"santosh.shilimkar@...cle.com" <santosh.shilimkar@...cle.com>,
	Nathan Lynch <Nathan_Lynch@...tor.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 02:36 PM, santosh.shilimkar@...cle.com wrote:
> On 8/27/15 11:34 AM, Nathan Lynch wrote:
>> 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.
>>
> Right. Just leave the full call in the commit so that the context
> is captured.
>
>
Will do that and resend it

-- 
Murali Karicheri
Linux Kernel, Keystone
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