From: Scott Wood <scottwood@freescale.com>
Date: Thu, 16 Jun 2011 19:09:17 +0000 (-0500)
Subject: powerpc/e500: fix breakage with fsl_rio_mcheck_exception
X-Git-Tag: v3.0-rc6~25^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=82a9a4809f4cb4ce3f17da99a8150df8455fa096;p=pandora-kernel.git

powerpc/e500: fix breakage with fsl_rio_mcheck_exception

The wrong MCSR bit was being used on e500mc.  MCSR_BUS_RBERR only exists
on e500v1/v2.  Use MCSR_LD on e500mc, and remove all MCSR checking
in fsl_rio_mcheck_exception as we now no longer call that function
if the appropriate bit in MCSR is not set.

If RIO support was enabled at compile-time, but was never probed, just
return from fsl_rio_mcheck_exception rather than dereference a NULL
pointer.

TODO: There is still a remaining, though comparitively minor, issue in
that this recovery mechanism will falsely engage if there's an unrelated
MCSR_LD event at the same time as a RIO error.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
---

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