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Date:   Wed, 09 Jan 2019 18:25:17 +1100
From:   Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:     Alexey Kardashevskiy <aik@...abs.ru>,
        David Gibson <david@...son.dropbear.id.au>
Cc:     Jason Gunthorpe <jgg@...pe.ca>, Leon Romanovsky <leon@...nel.org>,
        davem@...emloft.net, saeedm@...lanox.com, ogerlitz@...lanox.com,
        tariqt@...lanox.com, bhelgaas@...gle.com,
        linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        netdev@...r.kernel.org, alex.williamson@...hat.com,
        linux-pci@...r.kernel.org, linux-rdma@...r.kernel.org,
        sbest@...hat.com, paulus@...ba.org
Subject: Re: [PATCH] PCI: Add no-D3 quirk for Mellanox ConnectX-[45]

On Wed, 2019-01-09 at 17:32 +1100, Alexey Kardashevskiy wrote:
> I have just moved the "Mellanox Technologies MT27700 Family
> [ConnectX-4]" from garrison to firestone machine and there it does not
> produce an EEH, with the same kernel and skiboot (both upstream + my
> debug). Hm. I cannot really blame the card but I cannot see what could
> cause the difference in skiboot either. I even tried disabling NPU so
> garrison would look like firestone, still EEH'ing.

The systems have a different chip though, firestone is P8 and garrison
is P8', which a slightly different PHB revision. Worth checking if we
have anything significantly different in our inits and poke at the HW
guys.

BTW. Are the cards behind a switch in either case ?

Cheers,
Ben.


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