linux-kernel - Re: [PATCH v9 03/14] swiotlb: Set dev->dma_io_tlb

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Message-ID: <20210614062015.GC28343@lst.de>
Date:   Mon, 14 Jun 2021 08:20:15 +0200
From:   Christoph Hellwig <hch@....de>
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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Subject: Re: [PATCH v9 03/14] swiotlb: Set dev->dma_io_tlb_mem to the
 swiotlb pool used

On Fri, Jun 11, 2021 at 11:33:15PM +0800, Claire Chang wrote:
> I'm not sure if this would break arch/x86/pci/sta2x11-fixup.c
> swiotlb_late_init_with_default_size is called here
> https://elixir.bootlin.com/linux/v5.13-rc5/source/arch/x86/pci/sta2x11-fixup.c#L60

It will.  It will also break all non-OF devices.  I think you need to
initialize the initial pool in device_initialize, which covers all devices.