Bug#989778: Regression in at least 5.10.y and mainline: Firewire audio interface fails to work properly (when booted under Xen)
- To: Robin Murphy <robin.murphy@arm.com>, 989778-maintonly@bugs.debian.org
- Cc: 小太 <nospam@kota.moe>, Jianxiong Gao <jxgao@google.com>, Christoph Hellwig <hch@lst.de>, Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, Marek Szyprowski <m.szyprowski@samsung.com>, xen-devel@lists.xenproject.org
- Subject: Bug#989778: Regression in at least 5.10.y and mainline: Firewire audio interface fails to work properly (when booted under Xen)
- From: Salvatore Bonaccorso <carnil@debian.org>
- Date: Wed, 23 Jun 2021 20:50:05 +0200
- Message-id: <[🔎] YNOCXe1cuNDNAB+Z@eldamar.lan>
- Reply-to: Salvatore Bonaccorso <carnil@debian.org>, 989778-maintonly@bugs.debian.org
- In-reply-to: <[🔎] 2f7c7d36-b6f4-f8ab-756e-a563fa03b9e4@arm.com>
- References: <162352833546.2353.230557992597997974.reportbug@home.kota.moe> <[🔎] YMWl4UnFBAVRDnys@eldamar.lan> <162352833546.2353.230557992597997974.reportbug@home.kota.moe> <[🔎] 2f7c7d36-b6f4-f8ab-756e-a563fa03b9e4@arm.com> <162352833546.2353.230557992597997974.reportbug@home.kota.moe>
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
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