linux-kernel - Re: x86/dma conversion for v4.17-rc1 breaks sound / sst-acpi (commit 6e4bf5867783)

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Date:   Fri, 6 Apr 2018 16:52:39 +0200
From:   Dominik Brodowski <linux@...inikbrodowski.net>
To:     Christoph Hellwig <hch@....de>
Cc:     thomas.lendacky@....com, tglx@...utronix.de, dwmw2@...radead.org,
        joro@...tes.org, jdmason@...zu.us, konrad.wilk@...cle.com,
        torvalds@...ux-foundation.org, mulix@...ix.org,
        peterz@...radead.org, iommu@...ts.linux-foundation.org,
        mingo@...nel.org, linux-kernel@...r.kernel.org,
        lgirdwood@...il.com, broonie@...nel.org, perex@...ex.cz,
        tiwai@...e.com
Subject: Re: x86/dma conversion for v4.17-rc1 breaks sound / sst-acpi (commit
 6e4bf5867783)

On Fri, Apr 06, 2018 at 04:14:52PM +0200, Christoph Hellwig wrote:
> Hi Dominik,
> 
> can you try current Linus' master with the following hack applied and
> see if that works?
> 
> diff --git a/lib/swiotlb.c b/lib/swiotlb.c
> index 47aeb04c1997..32aacd0d56a8 100644
> --- a/lib/swiotlb.c
> +++ b/lib/swiotlb.c
> @@ -1087,6 +1087,6 @@ const struct dma_map_ops swiotlb_dma_ops = {
>  	.unmap_sg		= swiotlb_unmap_sg_attrs,
>  	.map_page		= swiotlb_map_page,
>  	.unmap_page		= swiotlb_unmap_page,
> -	.dma_supported		= swiotlb_dma_supported,
> +	.dma_supported		= dma_direct_supported,
>  };
>  #endif /* CONFIG_DMA_DIRECT_OPS */

Yes, it solves the issue.

Thanks,
	Dominik