linux-kernel - Re: [PATCH V2 03/12] dtb: amd: Fix DMA ranges in device tree

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Message-ID: <56BBA80E.6090205@amd.com>
Date:	Thu, 11 Feb 2016 04:13:50 +0700
From:	Suravee Suthikulpanit <Suravee.Suthikulpanit@....com>
To:	Arnd Bergmann <arnd@...db.de>
CC:	<robh+dt@...nel.org>, <pawel.moll@....com>, <mark.rutland@....com>,
	<ijc+devicetree@...lion.org.uk>, <galak@...eaurora.org>,
	<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>, <arm@...nel.org>,
	<brijeshkumar.singh@....com>, <thomas.lendacky@....com>,
	<leo.duran@....com>
Subject: Re: [PATCH V2 03/12] dtb: amd: Fix DMA ranges in device tree

Hi Arnd,

On 2/9/16 21:57, Arnd Bergmann wrote:
> On Monday 08 February 2016 11:59:08 Suravee Suthikulpanit wrote:
>> From: Suravee Suthikulpanit <suravee.suthikulpanit@....com>
>>
>> Fix DMA ranges of smb0 and pcie0 nodes in AMD Seattle SOC.
>>
>> Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@....com>
>>
>
> This could use a changelog text to explain why it's broken and how the
> fix works.
>
> 	Arnd
>

So, I have not experience the breakage. However, IIUC, the GICv2m MSI 
frame is also considered DMA-able. So, I think it should be included in 
the dma-range specified here. Please let me know if my assumption is 
incorrect. Otherwise, I will include more description in the commit log 
in my next rev.

Thanks,
Suravee