[Ocf-linux-users] kernel panic, hifn7751, digests

[John G. <joh...@ta...>]

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