From mboxrd@z Thu Jan  1 00:00:00 1970
From: Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>
Subject: Re: [PATCH 06/44] iommu/dma: don't rely on DMA_ERROR_CODE
Date: Fri, 16 Jun 2017 10:37:00 +0200
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To: Robin Murphy <robin.murphy-5wv7dgnIgG8@public.gmane.org>
Cc: linux-mips-6z/3iImG2C8G8FEW9MqTrA@public.gmane.org, linux-samsung-soc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-ia64-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-c6x-dev-jPsnJVOj+W6hPH1hqNUYSQ@public.gmane.org, linux-s390-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-sh-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-hexagon-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-xtensa-PjhNF2WwrV/0Sa2dR60CXw@public.gmane.org, x86-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org, dmaengine-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, openrisc-cunTk1MwBs9a3B2Vnqf2dGD2FQJk+8+b@public.gmane.org, netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, sparclinux-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, xen-devel-GuqFBffKawtpuQazS67q72D2FQJk+8+b@public.gmane.org, linuxppc-dev-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org, Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org

On Thu, Jun 08, 2017 at 02:59:07PM +0100, Robin Murphy wrote:
> Hi Christoph,
> 
> On 08/06/17 14:25, Christoph Hellwig wrote:
> > DMA_ERROR_CODE is not a public API and will go away soon.  dma dma-iommu
> > driver already implements a proper ->mapping_error method, so it's only
> > using the value internally.  Add a new local define using the value
> > that arm64 which is the only current user of dma-iommu.
> 
> It would be fine to just use 0, since dma-iommu already makes sure that
> that will never be allocated for a valid DMA address.

I'll change it to 0.

> Otherwise, looks good!

Can you give me a formal ACK or Reviewed-by: ?