In <20010426170940.6449FB00B@cvs.netbsd.org>
bouyer@netbsd.org wrote:

> Module Name:	syssrc
> Committed By:	bouyer
> Date:		Thu Apr 26 17:09:39 UTC 2001
> 
> Modified Files:
> 	syssrc/sys/dev/ic: ncr53c9x.c
> 
> Log Message:
> Disable tagged queuing for now, it causes commands timeouts.

How about the attached patch?

I'm not sure when request sense commands are issued from mid-layer,
but all request sense stuff should be removed from each HBA driver?
---
Izumi Tsutsui
tsutsui@ceres.dti.ne.jp

Index: ncr53c9x.c
===================================================================
RCS file: /cvsroot/syssrc/sys/dev/ic/ncr53c9x.c,v
retrieving revision 1.75
diff -u -r1.75 ncr53c9x.c
--- ncr53c9x.c	2001/04/25 17:53:33	1.75
+++ ncr53c9x.c	2001/04/27 22:43:50
@@ -865,6 +865,9 @@
 		}
 		ecb->stat = 0;
 
+		if (flags & XS_CTL_REQSENSE)
+			ecb->flags |= ECB_SENSE;
+
 		s = splbio();
 
 		TAILQ_INSERT_TAIL(&sc->ready_list, ecb, chain);