[PATCH] Update MCP55 quirk to not affect non HyperTransport variants

Jesse Barnes jbarnes at virtuousgeek.org
Fri Dec 10 15:32:03 EST 2010

On Wed,  8 Dec 2010 09:47:48 -0500
Neil Horman <nhorman at 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.

Applied to my for-linus branch, thanks.

Jesse Barnes, Intel Open Source Technology Center

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