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From:   Linus Torvalds <torvalds@linux-foundation.org>
Date:   Fri, 30 Nov 2018 11:43:18 -0800
Message-ID: <CAHk-=wia7wykuDu-mzbhF+rL1M9FnJfnoidsvkz5TPMPHUep7g@mail.gmail.com>
Subject: Re: remove the ->mapping_error method from dma_map_ops V3
To:     Christoph Hellwig <hch@lst.de>
Cc:     iommu@lists.linux-foundation.org, jdmason@kudzu.us,
        joro@8bytes.org, David Woodhouse <dwmw2@infradead.org>,
        Marek Szyprowski <m.szyprowski@samsung.com>,
        robin.murphy@arm.com, "the arch/x86 maintainers" <x86@kernel.org>,
        linux-alpha@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        linux-ia64@vger.kernel.org, linux-parisc@vger.kernel.org,
        xen-devel@lists.xenproject.org, linux-arch@vger.kernel.org,
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On Fri, Nov 30, 2018 at 5:23 AM Christoph Hellwig <hch@lst.de> wrote:
>
> Error reporting for the dma_map_single and dma_map_page operations is
> currently a mess. [..]

I don't see anything objectionable there, but it's not like I checked
any of the context of the patches. For all I know there are odd corner
cases where some zero vs DMA_MAPPING_ERROR confusion lurks, but I
guess we'll find out..

So you can add my acked-by, fwiw.

                Linus