linux-kernel - Re: Bug#989778: Regression in at least 5.10.y and mainline: Firewire audio interface fails to work properly (when booted under Xen)

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Date:   Wed, 23 Jun 2021 20:50:05 +0200
From:   Salvatore Bonaccorso <carnil@...ian.org>
To:     Robin Murphy <robin.murphy@....com>,
        989778-maintonly@...s.debian.org
Cc:     小太 <nospam@...a.moe>,
        Jianxiong Gao <jxgao@...gle.com>,
        Christoph Hellwig <hch@....de>,
        Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
        linux-kernel@...r.kernel.org, iommu@...ts.linux-foundation.org,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        xen-devel@...ts.xenproject.org
Subject: Re: Bug#989778: Regression in at least 5.10.y and mainline: Firewire
 audio interface fails to work properly (when booted under Xen)

Hi Robin,

On Mon, Jun 14, 2021 at 02:29:08PM +0100, Robin Murphy wrote:
> On 2021-06-13 07:29, Salvatore Bonaccorso wrote:
> > A user in Debian reported the above issue, which was reproducible with
> > 5.13-rc5 and 5.10.y as packaged in Debian and found that 85a5a6875ca9
> > ("swiotlb: don't modify orig_addr in swiotlb_tbl_sync_single") that
> > introduced the issue.
> 
> Sounds like it's probably the same thing as being discussed over here:
> 
> https://lore.kernel.org/linux-iommu/2e899de2-4b69-c4b6-33a6-09fb8949d2fd@nxp.com/

Thanks for the pointer, it seems that now it has been fixed upstream
with 5f89468e2f06 ("swiotlb: manipulate orig_addr when tlb_addr has
offset").

Regards,
Salvatore