powerpc/eeh: Don't check RTAS token to get PE addr
authorGavin Shan <shangw@linux.vnet.ibm.com>
Wed, 5 Jun 2013 14:25:50 +0000 (14:25 +0000)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 13 Jun 2013 16:45:00 +0000 (09:45 -0700)
commited753efb898ba2929d19f9cc050c432be54aeae7
tree7ca38b018d1c7f1c45cecd6c56cc451cb5880f45
parent06f3ee48d0f0c2a531f7c5ff6355f9ccee32b20d
powerpc/eeh: Don't check RTAS token to get PE addr

commit b8b3de224f194005ad87ede6fd022fcc2bef3b1a upstream.

RTAS token "ibm,get-config-addr-info" or ibm,get-config-addr-info2"
are used to retrieve the PE address according to PCI address, which
made up of domain/bus/slot/function. If we don't have those 2 tokens,
the domain/bus/slot/function would be used as the address for EEH
RTAS operations. Some older f/w might not have those 2 tokens and
that blocks the EEH functionality to be initialized. It was introduced
by commit e2af155c ("powerpc/eeh: pseries platform EEH initialization").

The patch skips the check on those 2 tokens so we can bring up EEH
functionality successfully. And domain/bus/slot/function will be
used as address for EEH RTAS operations.

Reported-by: Robert Knight <knight@princeton.edu>
Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Tested-by: Robert Knight <knight@princeton.edu>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
arch/powerpc/platforms/pseries/eeh_pseries.c