linux-kernel - Re: Report in downstream Debian: mpt3sas broken with xen dom0 with update to 5.10.149 in 5.10.y.

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Date:   Tue, 14 Mar 2023 12:23:35 +0100
From:   Juergen Gross <jgross@...e.com>
To:     Joost Roeleveld <joost@...arean.org>,
        Christoph Hellwig <hch@...radead.org>,
        Andrew Cooper <Andrew.Cooper3@...rix.com>
Cc:     jejb@...ux.ibm.com, Sreekanth Reddy <sreekanth.reddy@...adcom.com>,
        Bart Van Assche <bvanassche@....org>,
        Salvatore Bonaccorso <carnil@...ian.org>,
        sathya.prakash@...adcom.com, suganath-prabu.subramani@...adcom.com,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        MPT-FusionLinux.pdl@...adcom.com, linux-scsi@...r.kernel.org,
        linux-kernel@...r.kernel.org, xen-devel@...ts.xenproject.org,
        adi@...egisch.at
Subject: Re: Report in downstream Debian: mpt3sas broken with xen dom0 with
 update to 5.10.149 in 5.10.y.

On 14.03.23 12:17, Joost Roeleveld wrote:
>> On Mon, Oct 24, 2022 at 05:28:05PM +0000, Andrew Cooper wrote:
>>> I don't know exactly how this translates to Linux internals, but most
>>> devices are fine and it's routinely the mpt2/3sas drivers which
>>> encounter problems.  It would be lovely if we could get to the bottom of
>>> this for once and for all.
>>
>> So to summarize my two mails: I think te use of dma_get_required_mask
>> in mpt3sas is wrong, and the dma_get_required_mask return value from
>> xen-swiotlb is also wrong. Fixing either one should fix this problem,
>> and I think we should fix both.
> 
> Hi all,
> 
> Is there anything that can be done to get this fixed in xen and the kernel somehow?
> I keep having to manually patch the mpt3sas driver to prevent it from being able 
> to switch to 32bit mode each time I upgrade the kernel.

Just use 5.10.173.


Juergen


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