tree e9eb1f6a1701f8bbe8fdabf6bcfad87870e2547a
parent a84b0bd6ad4b5ab7220deb799f30515a9eb0d7fc
author Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net> 1282144363 +0000
committer Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net> 1282144363 +0000

Add paranoid checks to sb600spi driver

Add paranoid checks for correct values in essential registers in the SB600/SB700/... SPI driver. If something else changes the values we
wrote, we will see severe read/write corruption.
sb600spi will now abort the access and return an error if it detects
this sort of corruption.

Note: This corruption can be caused by a few different events:
- IPMI/BMC/IMC accesses flash
- Other software accesses flash
The nature of flash access (read/write/ID/...) is irrelevant. Each such
access will cause corruption for all other accesses happening at the
same time.

Thanks to Matthias Kretz for testing this patch.

Corresponding to flashrom svn r1145.

Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: Matthias Kretz <kretz@kde.org>