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

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Date:	Wed, 10 Feb 2016 22:19:51 +0100
From:	Arnd Bergmann <arnd@...db.de>
To:	Suravee Suthikulpanit <Suravee.Suthikulpanit@....com>
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

On Thursday 11 February 2016 04:13:50 Suravee Suthikulpanit wrote:
> 
> 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.

No, I think this makes sense. Just put a more explanation into the changelog
when those things are not obvious from looking at the change.

	Arnd