diff --git a/sys/kern/subr_bus.c b/sys/kern/subr_bus.c
--- a/sys/kern/subr_bus.c
+++ b/sys/kern/subr_bus.c
@@ -2083,10 +2083,9 @@
 		panic("device_probe_child: parent device has no devclass");
 
 	/*
-	 * If the state is already probed, then return.  However, don't
-	 * return if we can rebid this object.
+	 * If the state is already probed, then return.
 	 */
-	if (child->state == DS_ALIVE && (child->flags & DF_REBID) == 0)
+	if (child->state == DS_ALIVE)
 		return (0);
 
 	for (; dc; dc = dc->parent) {
@@ -2188,29 +2187,7 @@
 	/*
 	 * If we found a driver, change state and initialise the devclass.
 	 */
-	/* XXX What happens if we rebid and got no best? */
 	if (best) {
-		/*
-		 * If this device was attached, and we were asked to
-		 * rescan, and it is a different driver, then we have
-		 * to detach the old driver and reattach this new one.
-		 * Note, we don't have to check for DF_REBID here
-		 * because if the state is > DS_ALIVE, we know it must
-		 * be.
-		 *
-		 * This assumes that all DF_REBID drivers can have
-		 * their probe routine called at any time and that
-		 * they are idempotent as well as completely benign in
-		 * normal operations.
-		 *
-		 * We also have to make sure that the detach
-		 * succeeded, otherwise we fail the operation (or
-		 * maybe it should just fail silently?  I'm torn).
-		 */
-		if (child->state > DS_ALIVE && best->driver != child->driver)
-			if ((result = device_detach(dev)) != 0)
-				return (result);
-
 		/* Set the winning driver, devclass, and flags. */
 		if (!child->devclass) {
 			result = device_set_devclass(child, best->driver->name);
@@ -2229,11 +2206,7 @@
 			 * sure that we have the right description.
 			 */
 			DEVICE_PROBE(child);
-#if 0
-			child->flags |= DF_REBID;
-#endif
-		} else
-			child->flags &= ~DF_REBID;
+		}
 		child->state = DS_ALIVE;
 
 		bus_data_generation_update();
@@ -2921,7 +2894,7 @@
 
 	GIANT_REQUIRED;
 
-	if (dev->state >= DS_ALIVE && (dev->flags & DF_REBID) == 0)
+	if (dev->state >= DS_ALIVE)
 		return (-1);
 
 	if (!(dev->flags & DF_ENABLED)) {
@@ -4145,8 +4118,7 @@
 
 	DEVICE_IDENTIFY(driver, dev);
 	TAILQ_FOREACH(child, &dev->children, link) {
-		if (child->state == DS_NOTPRESENT ||
-		    (child->flags & DF_REBID))
+		if (child->state == DS_NOTPRESENT)
 			device_probe_and_attach(child);
 	}
 }
@@ -5334,7 +5306,6 @@
 	    (dev->flags&DF_FIXEDCLASS? "fixed,":""),
 	    (dev->flags&DF_WILDCARD? "wildcard,":""),
 	    (dev->flags&DF_DESCMALLOCED? "descmalloced,":""),
-	    (dev->flags&DF_REBID? "rebiddable,":""),
 	    (dev->flags&DF_SUSPENDED? "suspended,":""),
 	    (dev->ivars? "":"no "),
 	    (dev->softc? "":"no "),
@@ -5736,7 +5707,7 @@
 	/* Perform the requested operation. */
 	switch (cmd) {
 	case DEV_ATTACH:
-		if (device_is_attached(dev) && (dev->flags & DF_REBID) == 0)
+		if (device_is_attached(dev))
 			error = EBUSY;
 		else if (!device_is_enabled(dev))
 			error = ENXIO;
diff --git a/sys/sys/bus.h b/sys/sys/bus.h
--- a/sys/sys/bus.h
+++ b/sys/sys/bus.h
@@ -90,7 +90,6 @@
 #define	DF_QUIET	0x10		/* don't print verbose attach message */
 #define	DF_DONENOMATCH	0x20		/* don't execute DEVICE_NOMATCH again */
 #define	DF_EXTERNALSOFTC 0x40		/* softc not allocated by us */
-#define	DF_REBID	0x80		/* Can rebid after attach */
 #define	DF_SUSPENDED	0x100		/* Device is suspended. */
 #define	DF_QUIET_CHILDREN 0x200		/* Default to quiet for all my children */
 #define	DF_ATTACHED_ONCE 0x400		/* Has been attached at least once */