Folks
Between ocf-linux-20060331 and ocf-linux-20071215 something got into the
hifn driver which causes a kernel panic under load calculating digests.
By pretty much brute force I think I've tracked down what's causing it.
The patch kinda speaks for itself but its all related to moving towards
a common crypto_copyback function. Reinstating crp->crp_mac rather than
using crp->crp_buf and the complexity that entails in
crypto_copyback/cuio_copyback seems to fix it.
I don't pretend to understand this but it does seem to work for us.
As I say, the crash only happens under heavy load and if I have
ENABLE_DIGESTS on in the openssl eng_cryptodev.c
Just thought I'd let you know or might help someone.
Patch and panic signature attached.
cheers
John Gumb
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