Add the sabtty children devices as unordered. Use the unit numbr of

the sabtty device to create its description so that they will be
unique for machines with multiple sab chips.

This fixes a panic on machines with an rsc card.

Tested by:	obrien (e250)

1 files changed, 4 insertions, 5 deletions

diff --git a/sys/dev/sab/sab.c b/sys/dev/sab/sab.c
index 2daf97b..0540dcf 100644
--- a/sys/dev/sab/sab.c
+++ b/sys/dev/sab/sab.c
@@ -332,7 +332,7 @@ sab_attach(device_t dev)
 	SAB_WRITE(sc, SAB_IPC, sc->sc_ipc);
 
 	for (i = 0; i < SAB_NCHAN; i++)
-		child[i] = device_add_child(dev, "sabtty", i);
+		child[i] = device_add_child(dev, "sabtty", -1);
 	bus_generic_attach(dev);
 	for (i = 0; i < SAB_NCHAN; i++)
 		sc->sc_child[i] = device_get_softc(child[i]);
@@ -413,11 +413,10 @@ sab_shutdown(void *v)
 static int
 sabtty_probe(device_t dev)
 {
+	char desc[32];
 
-	if ((device_get_unit(dev) & 1) == 0)
-		device_set_desc(dev, "ttya");
-	else
-		device_set_desc(dev, "ttyb");
+	snprintf(desc, sizeof(desc), "tty%c", device_get_unit(dev) + 'a');
+	device_set_desc_copy(dev, desc);
 	return (0);
 }