linux-kernel - Re: [PATCH 12/34] powerpc/cell: move dma direct window setup out of dma

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Date:   Fri, 14 Dec 2018 17:42:33 +0100
From:   Christoph Hellwig <hch@....de>
To:     Michael Ellerman <mpe@...erman.id.au>
Cc:     Christoph Hellwig <hch@....de>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        linuxppc-dev@...ts.ozlabs.org, iommu@...ts.linux-foundation.org,
        linux-mm@...ck.org, linux-arch@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 12/34] powerpc/cell: move dma direct window setup out
 of dma_configure

On Sat, Dec 15, 2018 at 12:29:11AM +1100, Michael Ellerman wrote:
> I think the problem is that we don't want to set iommu_bypass_supported
> unless cell_iommu_fixed_mapping_init() succeeds.
> 
> Yep. This makes it work for me on cell on top of your v5.

Thanks, this looks good.  I've folded it with the slight change of moving
the iommu_bypass_supported setup into cell_iommu_fixed_mapping_init.