dm-crypt using hifn_795x - still broken

Hi,

i tested 2.6.28-rc4 with the patch from 
http://marc.info/?l=linux-crypto-vger&m=122643041300555&w=2

but i get the following error, as soon as i try to mount the de-crypted 
dm-cypt-block device (cryptsetup luksOpen however works):

hifn0: r: 00000000, active: 0, started: 20, success: 4247: qlen: 0/1, reset: 
1.
hifn795x: assuming 66MHz clock speed, override with 
hifn_pll_ref=ext<frequency>
I/O error in filesystem ("dm-0") meta-data dev dm-0 block 0x1c88d6fb       
("xlog_bread")
error 5 buf count 2097152
XFS: failed to find log head
XFS: log mount/recovery failed: error 5
XFS: log mount failed

tell me if you need more info for debugging this.

Thanks for your efforts!
Tobias