diff --git a/[refs] b/[refs]
index ddec9b706a84..5e0545425a1b 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 988440e7e51c6f8061c98d03d618ba090e7b84ef
+refs/heads/master: b94badbb47cb50f4fca8440efdaa8ebd32604fe4
diff --git a/trunk/drivers/usb/core/usb.c b/trunk/drivers/usb/core/usb.c
index 184c24660a4c..ab766e0fe4ef 100644
--- a/trunk/drivers/usb/core/usb.c
+++ b/trunk/drivers/usb/core/usb.c
@@ -761,7 +761,9 @@ void usb_buffer_free (
 )
 {
 	if (!dev || !dev->bus || !dev->bus->op || !dev->bus->op->buffer_free)
-	    	return;
+		return;
+	if (!addr)
+		return;
 	dev->bus->op->buffer_free (dev->bus, size, addr, dma);
 }