[4214] in linux-scsi channel archive
Re: ncr53c875 loop
daemon@ATHENA.MIT.EDU (Gerard Roudier)
Wed Jun 24 15:38:02 1998
Date: Wed, 24 Jun 1998 20:33:50 +0200 (MET DST)
From: Gerard Roudier <groudier@club-internet.fr>
To: Keith Owens <kaos@ocs.com.au>
cc: linux-scsi@vger.rutgers.edu
In-Reply-To: <19980623235448.1772.qmail@mail.ocs.com.au>
On Wed, 24 Jun 1998, Keith Owens wrote:
> I have an intermittent problem where ncr53c875 will loop trying to
> reload the script while detecting ID 2, Micropolis 3243NT. Happens on
> 2.0.34 and 2.1.106, both SMP, no overclocking. Is this hardware or
> software? You don't have to tell me that the 3243 is a pile of crud,
> this is the third replacement.
The drive is disconnected the bus when the chip was not expecting this
to happen. Devices may use this to signal a severe error condition
to the initiator. Donnot have idea about what the drive is complaining
for, however the driver should not reset the bus.
I would suggest you to try this patch:
--- linux/drivers/scsi/ncr53c8xx.c.ORIG Sat May 16 15:32:49 1998
+++ linux/drivers/scsi/ncr53c8xx.c Wed Jun 24 20:19:26 1998
@@ -7138,8 +7138,9 @@
if (INB (nc_scr1) != 0xff) {
OUTB (nc_scr1, HS_UNEXPECTED);
OUTL (nc_dsp, NCB_SCRIPT_PHYS (np, cleanup));
- };
- ncr_start_reset(np, driver_setup.settle_delay);
+ }
+ else
+ ncr_start_reset(np, driver_setup.settle_delay);
return;
};
And you also could you give a try to latest 3.0b driver version
which is available at ftp://ftp.tux.org/pub/roudier.
This version is normaly quite reliable and is expecting to be prooved so
in order to be proposed for incorporation into both stable and current
kernels.
[...]
> ncr53c875-0:2: ERROR (0:4) (8-0-0) (0/5) @ (script 15c:87030000).
> ncr53c875-0: script cmd = 72580000
> ncr53c875-0: regdump: da 00 80 05 47 00 02 0e 02 08 00 00 80 00 0e 02.
> ncr53c875-0: have to clear fifos.
> ncr53c875-0: unexpected disconnect
> ncr53c875-0: restart (scsi reset).
> ncr53c875-0: copying script fragments into the on-board RAM ...
Regards,
Gerard.
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