linux-kernel - Re: [Bugfix] x86, irq: Fix a regression caused by commit b5dc8e6c21e7

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Date:	Sun, 9 Aug 2015 22:11:44 +0800
From:	Jiang Liu <jiang.liu@...ux.intel.com>
To:	Alexander Holler <holler@...oftware.de>,
	Thomas Gleixner <tglx@...utronix.de>,
	Mark Rustad <mark.d.rustad@...el.com>,
	Alex Deucher <alexdeucher@...il.com>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org
Cc:	Tony Luck <tony.luck@...el.com>, linux-kernel@...r.kernel.org
Subject: Re: [Bugfix] x86, irq: Fix a regression caused by commit b5dc8e6c21e7

On 2015/8/9 18:14, Alexander Holler wrote:
> Am 09.08.2015 um 10:15 schrieb Jiang Liu:
>> Alex Deucher, Mark Rustad and Alexander Holler reported a regression
>> with the latest v4.2-rc4 kernel, which breaks some SATA controllers.
>> With multi-MSI capable SATA controllers, only the first port works,
>> all other ports times out when executing SATA commands. This regression
>> bisects to 52f518a3a7c2 ("x86/MSI: Use hierarchical irqdomains to manage
>> MSI interrupts"), but it's not the root cause, it just triggers a bug
>> caused by b5dc8e6c21e7 ("x86/irq: Use hierarchical irqdomain to manage
>> CPU interrupt vectors").
>>
>> With this patch applied, the affected SATA controllers work as expected.
>>
>> Signed-off-by: Jiang Liu <jiang.liu@...ux.intel.com>
>> Reported-by: Alex Deucher <alexdeucher@...il.com>
>> Reported-by: Mark Rustad <mrustad@...il.com>
>> Reported-by: Alexander Holler <holler@...oftware.de>
>> ---
>> Hi Alex, Mark and Alexandler,
>>     Sorry for the long delay to root cause this regression, it's
>> really annoying. Could you please help test this patch against the
>> latest v4.2-rcx?
> 
> Works. Thanks.
> 
> Tested-by: Alexander Holler <holler@...oftware.de>
Thanks, Alexander!
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