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

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Message-ID: <20191014110911.GL12262@dragon>
Date:   Mon, 14 Oct 2019 19:09:12 +0800
From:   Shawn Guo <shawnguo@...nel.org>
To:     Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
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, Oct 14, 2019 at 12:00:25PM +0200, Nicolas Saenz Julienne wrote:
> 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 This series has been superseded by this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.

Okay, thanks for letting me know.  Dropped them.

Shawn