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: <2025021548-amiss-duffel-9dcf@gregkh>
Date: Sat, 15 Feb 2025 13:34:03 +0100
From: Greg KH <gregkh@...uxfoundation.org>
To: Jürgen Groß <jgross@...e.com>
Cc: Harshit Mogalapalli <harshit.m.mogalapalli@...cle.com>,
	Salvatore Bonaccorso <carnil@...ian.org>,
	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>,
	Konrad Rzeszutek Wilk <konrad.wilk@...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

On Sat, Feb 15, 2025 at 12:47:57PM +0100, Jürgen Groß wrote:
> On 12.02.25 16:12, Harshit Mogalapalli wrote:
> > Hi Salvatore,
> > 
> > On 12/02/25 00:56, Salvatore Bonaccorso wrote:
> > > 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?
> > > 
> > 
> > Konrad pointed me at this thread: https://lore.kernel.org/
> > all/20250211120432.29493-1-jgross@...e.com/
> > 
> > This has some fixes, but not landed upstream yet.
> 
> Patches are upstream now. In case you still experience any problems, please
> speak up.

What specific commits should be backported here?

thanks,

greg k-h