From e64f402ff1de1681ea7a4ca183bcd3d15768b093 Mon Sep 17 00:00:00 2001
From: Poul-Henning Kamp <phk@FreeBSD.org>
Date: Sat, 31 May 2003 18:56:58 +0000
Subject: [PATCH] Hang softc from dev_t

---
 sys/i386/isa/wt.c | 24 ++++++++++++++++++------
 1 file changed, 18 insertions(+), 6 deletions(-)

diff --git a/sys/i386/isa/wt.c b/sys/i386/isa/wt.c
index e29664d30a2..f994a7ef47c 100644
--- a/sys/i386/isa/wt.c
+++ b/sys/i386/isa/wt.c
@@ -249,6 +249,7 @@ static int
 wtattach (struct isa_device *id)
 {
 	wtinfo_t *t = wttab + id->id_unit;
+	dev_t dev;
 
 	id->id_ointr = wtintr;
 	if (t->type == ARCHIVE) {
@@ -260,7 +261,9 @@ wtattach (struct isa_device *id)
 	t->dens = -1;                           /* unknown density */
 	isa_dmainit(t->chan, 1024);
 
-	make_dev(&wt_cdevsw, id->id_unit, 0, 0, 0600, "rwt%d", id->id_unit);
+	dev = make_dev(&wt_cdevsw, id->id_unit,
+	    UID_ROOT, GID_WHEEL, 0600, "rwt%d", id->id_unit);
+	dev->si_drv1 = t;
 	return (1);
 }
 
@@ -279,10 +282,15 @@ static int
 wtopen (dev_t dev, int flag, int fmt, struct thread *td)
 {
 	int u = minor (dev) & WT_UNIT;
-	wtinfo_t *t = wttab + u;
+	wtinfo_t *t;
 	int error;
 
-	if (u >= NWT || t->type == UNKNOWN)
+	if (u >= NWT)
+		return (ENXIO);
+
+	t = dev->si_drv1;
+
+	if (t->type == UNKNOWN)
 		return (ENXIO);
 
 	/* Check that device is not in use */
@@ -361,7 +369,9 @@ static int
 wtclose (dev_t dev, int flags, int fmt, struct thread *td)
 {
 	int u = minor (dev) & WT_UNIT;
-	wtinfo_t *t = wttab + u;
+	wtinfo_t *t;
+
+	t = dev->si_drv1;
 
 	if (u >= NWT || t->type == UNKNOWN)
 		return (ENXIO);
@@ -410,9 +420,10 @@ static int
 wtioctl (dev_t dev, u_long cmd, caddr_t arg, int flags, struct thread *td)
 {
 	int u = minor (dev) & WT_UNIT;
-	wtinfo_t *t = wttab + u;
+	wtinfo_t *t;
 	int error, count, op;
 
+	t = dev->si_drv1;
 	if (u >= NWT || t->type == UNKNOWN)
 		return (ENXIO);
 
@@ -508,9 +519,10 @@ static void
 wtstrategy (struct bio *bp)
 {
 	int u = minor (bp->bio_dev) & WT_UNIT;
-	wtinfo_t *t = wttab + u;
+	wtinfo_t *t;
 	int s;
 
+	t = bp->bio_dev->si_drv1;
 	bp->bio_resid = bp->bio_bcount;
 	if (u >= NWT || t->type == UNKNOWN) {
 		bp->bio_error = ENXIO;