linux-kernel - Re: [PATCH 1/2] dma-mapping: add a dma_ops

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Date:   Tue, 24 Mar 2020 08:52:25 +0100
From:   Christoph Hellwig <hch@....de>
To:     Alexey Kardashevskiy <aik@...abs.ru>
Cc:     Christoph Hellwig <hch@....de>, iommu@...ts.linux-foundation.org,
        linuxppc-dev@...ts.ozlabs.org, Lu Baolu <baolu.lu@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Joerg Roedel <joro@...tes.org>,
        Robin Murphy <robin.murphy@....com>,
        linux-kernel@...r.kernel.org,
        "Aneesh Kumar K.V" <aneesh.kumar@...ux.ibm.com>
Subject: Re: [PATCH 1/2] dma-mapping: add a dma_ops_bypass flag to struct
 device

On Tue, Mar 24, 2020 at 02:37:59PM +1100, Alexey Kardashevskiy wrote:
> dma_alloc_direct() and dma_map_direct() do the same thing now which is
> good, did I miss anything else?

dma_alloc_direct looks at coherent_dma_mask, dma_map_direct looks
at dma_mask.