From 21f6041b9f55877f1422eafceedc7c051f64adda Mon Sep 17 00:00:00 2001
From: Kenneth R Westerback <krw@cvs.openbsd.org>
Date: Sun, 18 Aug 2019 02:43:53 +0000
Subject: When activating or detaching a target don't search the scsi_link
 SLIST for each target:lun. Just travese the SLIST once taking care of
 relevant scsi_link's as they are encountered.

ok jmatthew@
---
 sys/scsi/scsiconf.c | 54 ++++++++++++++++++++++++++++++++++++-----------------
 1 file changed, 37 insertions(+), 17 deletions(-)

diff --git a/sys/scsi/scsiconf.c b/sys/scsi/scsiconf.c
index 181f8302d41..6fbe29c6824 100644
--- a/sys/scsi/scsiconf.c
+++ b/sys/scsi/scsiconf.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: scsiconf.c,v 1.201 2019/08/18 00:58:54 krw Exp $	*/
+/*	$OpenBSD: scsiconf.c,v 1.202 2019/08/18 02:43:52 krw Exp $	*/
 /*	$NetBSD: scsiconf.c,v 1.57 1996/05/02 01:09:01 neil Exp $	*/
 
 /*
@@ -73,6 +73,8 @@
 int	scsi_probedev(struct scsibus_softc *, int, int);
 void	scsi_add_link(struct scsibus_softc *, struct scsi_link *);
 void	scsi_remove_link(struct scsibus_softc *, struct scsi_link *);
+int	scsi_activate_link(struct scsibus_softc *, struct scsi_link *, int);
+int	scsi_detach_link(struct scsibus_softc *, struct scsi_link *, int);
 
 void	scsi_devid(struct scsi_link *);
 int	scsi_devid_pg80(struct scsi_link *);
@@ -226,12 +228,15 @@ scsi_activate_bus(struct scsibus_softc *sb, int act)
 int
 scsi_activate_target(struct scsibus_softc *sb, int target, int act)
 {
-	int lun, r, rv = 0;
+	struct scsi_link *link;
+	int r, rv = 0;
 
-	for (lun = 0; lun < sb->adapter_link->luns; lun++) {
-		r = scsi_activate_lun(sb, target, lun, act);
-		if (r)
-			rv = r;
+	SLIST_FOREACH(link, &sb->sc_link_list, bus_list) {
+		if (link->target == target) {
+			r = scsi_activate_link(sb, link, act);
+			if (r)
+				rv = r;
+		}
 	}
 	return (rv);
 }
@@ -240,13 +245,20 @@ int
 scsi_activate_lun(struct scsibus_softc *sb, int target, int lun, int act)
 {
 	struct scsi_link *link;
-	struct device *dev;
-	int rv = 0;
 
 	link = scsi_get_link(sb, target, lun);
 	if (link == NULL)
 		return (0);
 
+	return (scsi_activate_link(sb, link, act));
+}
+
+int
+scsi_activate_link(struct scsibus_softc *sb, struct scsi_link *link, int act)
+{
+	struct device *dev;
+	int rv = 0;
+
 	dev = link->device_softc;
 	switch (act) {
 	case DVACT_DEACTIVATE:
@@ -454,19 +466,19 @@ int
 scsi_detach_target(struct scsibus_softc *sb, int target, int flags)
 {
 	struct scsi_link *alink = sb->adapter_link;
-	int lun, r, rv = 0;
+	struct scsi_link *link, *tmp;
+	int r, rv = 0;
 
 	if (target < 0 || target >= alink->adapter_buswidth ||
 	    target == alink->adapter_target)
 		return (ENXIO);
 
-	for (lun = 0; lun < alink->luns; lun++) { /* nicer backwards? */
-		if (scsi_get_link(sb, target, lun) == NULL)
-			continue;
-
-		r = scsi_detach_lun(sb, target, lun, flags);
-		if (r != 0 && r != ENXIO)
-			rv = r;
+	SLIST_FOREACH_SAFE(link, &sb->sc_link_list, bus_list, tmp) {
+		if (link->target == target) {
+			r = scsi_detach_link(sb, link, flags);
+			if (r != 0 && r != ENXIO)
+				rv = r;
+		}
 	}
 
 	return (rv);
@@ -477,7 +489,6 @@ scsi_detach_lun(struct scsibus_softc *sb, int target, int lun, int flags)
 {
 	struct scsi_link *alink = sb->adapter_link;
 	struct scsi_link *link;
-	int rv;
 
 	if (target < 0 || target >= alink->adapter_buswidth ||
 	    target == alink->adapter_target ||
@@ -488,6 +499,15 @@ scsi_detach_lun(struct scsibus_softc *sb, int target, int lun, int flags)
 	if (link == NULL)
 		return (ENXIO);
 
+	return (scsi_detach_link(sb, link, flags));
+}
+
+int
+scsi_detach_link(struct scsibus_softc *sb, struct scsi_link *link, int flags)
+{
+	struct scsi_link *alink = sb->adapter_link;
+	int rv;
+
 	if (((flags & DETACH_FORCE) == 0) && (link->flags & SDEV_OPEN))
 		return (EBUSY);
 
-- 
cgit v1.2.3