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    SubjectRe: [PATCH] Update MCP55 quirk to not affect non HyperTransport variants
    On Wed,  8 Dec 2010 09:47:48 -0500
    Neil Horman <nhorman@tuxdriver.com> wrote:

    > I wrote this quirk awhile ago to properly setup MCP55 chips on hypertransport
    > busses so that interrupts reached whatever cpu happend to boot the kdump kernel.
    > while that works well, it was recently shown to me that a a non-hypertransport
    > variant of the MCP55 exists, and on those system the register that this quirk
    > manipulates causes hangs if you write to it. Since the quirk was only meant to
    > handle errors found on MCP55 chips that have a HT interface, this patch adds a
    > filter to make sure the chip is an HT capable before making the needed register
    > adjustment. This lets the broken MCP55s work with kdump while not breaking the
    > non-HT variants.
    >
    > Resolves https://bugzilla.kernel.org/show_bug.cgi?id=23952
    >
    > Tested successfully by the reporter and myself.
    >
    > Reported-by: Mathieu B__rard <mathieu@mberard.eu>
    > CC: linux-pci@vger.kernel.org
    > CC: kexec@lists.infradead.org
    > CC: Vivek Goyal <vgoyal@redhat.com>
    > CC: Jesse Barnes <jbarnes@virtuousgeek.org>
    > Signed-off-by: Neil Horman <nhorman@tuxdriver.com>

    That needed a Cc:<stable@kernel.org> as well. Please don't forget to
    remember -stable.


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