linux-kernel - Re: [patch 5/5] irqchip: armanda: Sanitize set_irq

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Date:	Thu, 24 Apr 2014 18:04:41 +0200
From:	Gregory CLEMENT <gregory.clement@...e-electrons.com>
To:	Thomas Gleixner <tglx@...utronix.de>
CC:	Jason Cooper <jason@...edaemon.net>,
	LKML <linux-kernel@...r.kernel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...e.hu>
Subject: Re: [patch 5/5] irqchip: armanda: Sanitize set_irq_affinity()

Hi Thomas,

On 18/03/2014 22:04, Gregory CLEMENT wrote:
> On 18/03/2014 21:55, Thomas Gleixner wrote:
>> On Tue, 18 Mar 2014, Gregory CLEMENT wrote:
>>> On 07/03/2014 18:17, Thomas Gleixner wrote:
>>>> It might be the readback of the routing register. I don't have the
>>>> datasheet of this.
>>>
>>> Sorry for the delay, I was on vacation without the hardware to test it.
>>>
>>> Indeed it was the readback of the routing register. (Unfortunately the
>>> datasheet was not yet publicly available :(  ). In your patch by replacing
>>> the line:
>>>
>>> writel(mask, main_int_base + ARMADA_370_XP_INT_SOURCE_CTL(hwirq));
>>>
>>> by the following ones:
>>>
>>> reg = readl(main_int_base + ARMADA_370_XP_INT_SOURCE_CTL(hwirq));
>>> reg = (reg & (~ARMADA_370_XP_INT_SOURCE_CPU_MASK)) | mask;
>>> writel(reg, main_int_base + ARMADA_370_XP_INT_SOURCE_CTL(hwirq));
>>>
>>> with
>>> #define ARMADA_370_XP_INT_SOURCE_CPU_MASK	0xF
>>>
>>> Then it worked.
>>>
>>> About masking with the online CPU in the original code, the purpose
>>> was to allow sharing the SoC with an other OS by doing AMP. This feature
>>> is part of the Marvell version of the kernel.
>>> The idea was to bring this latter in the vanilla kernel, but I am not sure
>>> that all the part needed for AMP are acceptable for mainline. So I can add
>>> it back later when we will need it.
>>
>> Right.
>>
>> So are you ok with that patch (including your change) ? If you send me
>> tested/acked-by i'll route it for 3.15
> 
> With the change I included you can add my
> 
> Acked-by: Gregory CLEMENT <gregory.clement@...e-electrons.com>
> Tested-by: Gregory CLEMENT <gregory.clement@...e-electrons.com>
> 

I have just noticed that this patch was not merged in 3.15.
Actually it is not in the core/irq branch of tip.git with
the other patches of the same series.
Is there any reason for this?

Thanks,

Gregory


-- 
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
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