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    SubjectRe: [PATCH] Update MCP55 quirk to not affect non HyperTransport variants
    On Thu, Dec 09, 2010 at 03:40:41PM -0800, Andrew Morton wrote:
    > 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.
    Thanks, Cc'ing stable on the thread

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