linux-kernel - Re: [6.1.y] Regression from b1e6e80a1b42 ("xen/swiotlb: add alignment check for dma buffers") when booting with Xen and mpt3sas_cm0 _scsih

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Message-ID: <Z6ukbNnyQVdw4kh0@eldamar.lan>
Date: Tue, 11 Feb 2025 20:26:36 +0100
From: Salvatore Bonaccorso <carnil@...ian.org>
To: Harshit Mogalapalli <harshit.m.mogalapalli@...cle.com>
Cc: Juergen Gross <jgross@...e.com>,
	Stefano Stabellini <sstabellini@...nel.org>,
	Sasha Levin <sashal@...nel.org>,
	Oleksandr Tyshchenko <oleksandr_tyshchenko@...m.com>,
	xen-devel@...ts.xenproject.org, iommu@...ts.linux.dev,
	Radoslav Bodó <radoslav.bodo@...lileo.cz>,
	regressions@...ts.linux.dev, linux-kernel@...r.kernel.org,
	stable@...r.kernel.org,
	Harshvardhan Jha <harshvardhan.j.jha@...cle.com>
Subject: Re: [6.1.y] Regression from b1e6e80a1b42 ("xen/swiotlb: add
 alignment check for dma buffers") when booting with Xen and mpt3sas_cm0
 _scsih_probe failures

Hi Harshit,

On Sun, Feb 09, 2025 at 01:45:38AM +0530, Harshit Mogalapalli wrote:
> Hi Salvatore,
> 
> On 08/02/25 21:26, Salvatore Bonaccorso wrote:
> > Hi Juergen, hi all,
> > 
> > Radoslav Bodó reported in Debian an issue after updating our kernel
> > from 6.1.112 to 6.1.115. His report in full is at:
> > 
> > https://bugs.debian.org/1088159
> > 
> 
> Note:
> We have seen this on 5.4.y kernel: More details here:
> https://lore.kernel.org/all/9dd91f6e-1c66-4961-994e-dbda87d69dad@oracle.com/

Thanks for the pointer, so looking at that thread I suspect the three
referenced bugs in Debian are in the end all releated. We have one as
well relating to the megasas_sas driver, this one for the mpt3sas
driver and one for the i40e driver).

AFAICS, there is not yet a patch which has landed upstream which I can
redirect to a affected user to test?

Regards,
Salvatore