linux-kernel - Re: [PATCH v7 05/15] swiotlb: Add a new get_io_tlb

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Message-ID: <YKvLc9onyqdsINP7@0xbeefdead.lan>
Date:   Mon, 24 May 2021 11:51:15 -0400
From:   Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
To:     Claire Chang <tientzu@...omium.org>
Cc:     Rob Herring <robh+dt@...nel.org>, mpe@...erman.id.au,
        Joerg Roedel <joro@...tes.org>, Will Deacon <will@...nel.org>,
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        sstabellini@...nel.org, Robin Murphy <robin.murphy@....com>,
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Subject: Re: [PATCH v7 05/15] swiotlb: Add a new get_io_tlb_mem getter

On Tue, May 18, 2021 at 02:51:52PM +0800, Claire Chang wrote:
> Still keep this function because directly using dev->dma_io_tlb_mem
> will cause issues for memory allocation for existing devices. The pool
> can't support atomic coherent allocation so we need to distinguish the
> per device pool and the default pool in swiotlb_alloc.

This above should really be rolled in the commit. You can prefix it by
"The reason it was done this way was because directly using .."