[POWERPC] pasemi: Add workaround for erratum 5945

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Erratum 5945 causes some of the registers on the PCIe root ports to
not read correctly.  Do a small dance to avoid this: Write an unused
register, read the value and write it back.  Thankfully this is not in
a hot code path.

Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Paul Mackerras <paulus@samba.org>

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Olof Johansson 2007-09-05 12:08:50 +10:00 • committed by Paul Mackerras

parent 68c8404c74

commit 4d442331e5

1 changed files with 60 additions and 2 deletions

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arch/powerpc/platforms/pasemi/pci.c

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