[src/trunk]: src/sys/dev/scsipi Don't attempt to read opcodes and their timeo...

[jdc <jdc%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/0b3ee61f7324
branches:  trunk
changeset: 932196:0b3ee61f7324
user:      jdc <jdc%NetBSD.org@localhost>
date:      Sat May 02 06:45:53 2020 +0000

description:
Don't attempt to read opcodes and their timeouts at attach time for
old devices.  The MAINTENANCE IN command was introduced with SCSI-3
and sending it to older peripherals can cause timeouts or them not
to respond to further requests.

diffstat:

 sys/dev/scsipi/scsiconf.c |  14 +++++++++-----
 1 files changed, 9 insertions(+), 5 deletions(-)

diffs (36 lines):

diff -r a120b35a48fd -r 0b3ee61f7324 sys/dev/scsipi/scsiconf.c
--- a/sys/dev/scsipi/scsiconf.c Sat May 02 00:50:07 2020 +0000
+++ b/sys/dev/scsipi/scsiconf.c Sat May 02 06:45:53 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: scsiconf.c,v 1.286 2020/02/19 16:04:39 riastradh Exp $ */
+/*     $NetBSD: scsiconf.c,v 1.287 2020/05/02 06:45:53 jdc Exp $       */
 
 /*-
  * Copyright (c) 1998, 1999, 2004 The NetBSD Foundation, Inc.
@@ -48,7 +48,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: scsiconf.c,v 1.286 2020/02/19 16:04:39 riastradh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: scsiconf.c,v 1.287 2020/05/02 06:45:53 jdc Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -1018,10 +1018,14 @@
                scsipi_insert_periph(chan, periph);
 
                /*
-                * determine supported opcodes and
-                * timeouts if available
+                * Determine supported opcodes and timeouts if available.
+                * Only do this on peripherals reporting SCSI version 3
+                * or greater - this command isn't in the SCSI-2 spec. and
+                * it causes either timeouts or peripherals disappearing
+                * when sent to some SCSI-1 or SCSI-2 peripherals.
                 */
-               scsipi_get_opcodeinfo(periph);
+               if (periph->periph_version >= 3)
+                       scsipi_get_opcodeinfo(periph);
 
                /*
                 * XXX Can't assign periph_dev here, because we'll