[PATCH] USB gadget: drain rndis response queue on disconnect

Drain the rndis response queue on disconnect.  This fixes a problem
in which an rndis response left in the queue from a previous session
could cause a subsequent session to fail.
Signed-off-by: Andy Lowe <alowe@mvista.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/gadget/rndis.c

@@ -1025,11 +1025,17 @@ int rndis_signal_disconnect (int configNr)
 
 void rndis_uninit (int configNr)
 {
+	u8 *buf;
+	u32 length;
+
 	if (configNr >= RNDIS_MAX_CONFIGS)
 		return;
 	rndis_per_dev_params [configNr].used = 0;
 	rndis_per_dev_params [configNr].state = RNDIS_UNINITIALIZED;
-	return;
+
+	/* drain the response queue */
+	while ((buf = rndis_get_next_response(configNr, &length)))
+		rndis_free_response(configNr, buf);
 }
 
 void rndis_set_host_mac (int configNr, const u8 *addr)