linux-kernel - Re: [PATCH 07/11] dts: arm64: layerscape: add dma-ranges property to qoric-mc node

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Message-ID: <f6262e61f858c6f50164416f4ea816e203c0704f.camel@suse.de>
Date:   Mon, 14 Oct 2019 12:00:25 +0200
From:   Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
To:     Shawn Guo <shawnguo@...nel.org>
Cc:     robh+dt@...nel.org, devicetree@...r.kernel.org,
        frowand.list@...il.com, linux-arm-kernel@...ts.infradead.org,
        linux-wireless@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, dmaengine@...r.kernel.org,
        etnaviv@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        xen-devel@...ts.xenproject.org, linux-tegra@...r.kernel.org,
        linux-media@...r.kernel.org, linux-pci@...r.kernel.org,
        Li Yang <leoyang.li@....com>, mbrugger@...e.com,
        robin.murphy@....com, f.fainelli@...il.com,
        james.quinlan@...adcom.com, wahrenst@....net,
        Mark Rutland <mark.rutland@....com>
Subject: Re: [PATCH 07/11] dts: arm64: layerscape: add dma-ranges property
 to qoric-mc node

On Mon, 2019-10-14 at 16:28 +0800, Shawn Guo wrote:
> On Tue, Sep 24, 2019 at 08:12:38PM +0200, Nicolas Saenz Julienne wrote:
> > qoriq-mc's dpmacs DMA configuration is inherited from their parent node,
> > which acts a bus in this regard. So far it maked all devices as
> > dma-coherent but no dma-ranges recommendation is made.
> > 
> > The truth is that the underlying interconnect has DMA constraints, so
> > add an empty dma-ranges in qoriq-mc's node in order for DT's DMA
> > configuration code to get the DMA constraints from it.
> > 
> > Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
> 
> Updated subject prefix as 'arm64: dts: ...', and applied the patch.

Hi Shawn,
these two patches are no longer needed. This series has been superseded by this
patch[1] 951d48855d ('of: Make of_dma_get_range() work on bus nodes', available
in linux-next) which fixed the issue directly in OF code.

Sorry for the noise.

Regards,
Nicolas

[1] https://lkml.org/lkml/2019/10/8/870


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