A repost of a patch forwarded by Mikael Reed from 2006-12-20.

The fibre channel IOC may kill a request for a variety of
reasons, some of which may be recovered by a retry, some of
which are unlikely to be recovered.  Return DID_ERROR
instead of DID_RESET to permit retry of the command,
just not an infinite number of them.
Signed-off-by: Michael Reed <mdr@sgi.com>
Signed-off-by: Eric Moore <Eric.Moore@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>