From 84bcda5d6851a64d00243493527ca2f25b0599cc Mon Sep 17 00:00:00 2001
From: Andrew Thompson <thompsa@FreeBSD.org>
Date: Sun, 1 Feb 2009 01:07:15 +0000
Subject: [PATCH] Revert part of r187970, the NULL check was removed from
 udbp_bulk_read_complete() as well as udbp_attach.

---
 sys/dev/usb2/misc/udbp2.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sys/dev/usb2/misc/udbp2.c b/sys/dev/usb2/misc/udbp2.c
index 97136e4bdcf6..4b4fbfd537d9 100644
--- a/sys/dev/usb2/misc/udbp2.c
+++ b/sys/dev/usb2/misc/udbp2.c
@@ -473,6 +473,9 @@ udbp_bulk_read_complete(node_p node, hook_p hook, void *arg1, int arg2)
 	struct mbuf *m;
 	int error;
 
+	if (sc == NULL) {
+		return;
+	}
 	mtx_lock(&sc->sc_mtx);
 
 	m = sc->sc_bulk_in_buffer;