>> Could you try the 2 attached patches please ?
> 
> These patches seem to have fixed the siop problems.
> 
> I didn't even need to disable tagged queuing, either ...
> 
> Thanks Manuel!

Oops.  Spoke too soon  :-(  (Sorry about the false hopes, Manuel)

During the /etc/daily run, with lots of "find"-ing going on, the same
DMA errors came back.  Back to the drawing board ... will try disabling
tagged queuing next.

 - Greg