Re: [PATCH v1 04/16] dma-iommu: Return error code from iommu_dma_map_sg()
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- To: Logan Gunthorpe <logang@xxxxxxxxxxxx>
- Subject: Re: [PATCH v1 04/16] dma-iommu: Return error code from iommu_dma_map_sg()
- From: Christoph Hellwig <hch@xxxxxx>
- Date: Fri, 16 Jul 2021 08:31:27 +0200
- Cc: linux-kernel@xxxxxxxxxxxxxxx, linux-alpha@xxxxxxxxxxxxxxx, linux-arm-kernel@xxxxxxxxxxxxxxxxxxx, linux-ia64@xxxxxxxxxxxxxxx, linux-mips@xxxxxxxxxxxxxxx, linuxppc-dev@xxxxxxxxxxxxxxxx, linux-s390@xxxxxxxxxxxxxxx, sparclinux@xxxxxxxxxxxxxxx, iommu@xxxxxxxxxxxxxxxxxxxxxxxxxx, linux-parisc@xxxxxxxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx, Christoph Hellwig <hch@xxxxxx>, Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>, Robin Murphy <robin.murphy@xxxxxxx>, Stephen Bates <sbates@xxxxxxxxxxxx>, Martin Oliveira <martin.oliveira@xxxxxxxxxxxxx>, Joerg Roedel <joro@xxxxxxxxxx>, Will Deacon <will@xxxxxxxxxx>
- In-reply-to: <20210715164544.6827-5-logang@deltatee.com>
- References: <20210715164544.6827-1-logang@deltatee.com> <20210715164544.6827-5-logang@deltatee.com>
- User-agent: Mutt/1.5.17 (2007-11-01)
Careful here. What do all these errors from the low-level code mean
here? I think we need to clearly standardize on what we actually
return from ->map_sg and possibly document what the callers expect and
can do, and enforce that only those error are reported.
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