From 7e2ff8bbff073b8f2d10ad9d4f1929e66f16395d Mon Sep 17 00:00:00 2001
From: Warner Losh <imp@FreeBSD.org>
Date: Fri, 19 Jan 2007 08:49:28 +0000
Subject: [PATCH] Cope gracefully with device_get_children returning an error.

Obtained from: Hans Petter Selasky
P4: http://perforce.freebsd.org/chv.cgi?CH=112957
---
 sys/dev/cardbus/cardbus.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/sys/dev/cardbus/cardbus.c b/sys/dev/cardbus/cardbus.c
index 2e3453eaccb..bd2b31c591a 100644
--- a/sys/dev/cardbus/cardbus.c
+++ b/sys/dev/cardbus/cardbus.c
@@ -217,7 +217,8 @@ cardbus_detach_card(device_t cbdev)
 	int tmp;
 	int err = 0;
 
-	device_get_children(cbdev, &devlist, &numdevs);
+	if (device_get_children(cbdev, &devlist, &numdevs) != 0)
+		return (ENOENT);
 
 	if (numdevs == 0) {
 		free(devlist, M_TEMP);
@@ -251,7 +252,9 @@ cardbus_driver_added(device_t cbdev, driver_t *driver)
 	struct cardbus_devinfo *dinfo;
 
 	DEVICE_IDENTIFY(driver, cbdev);
-	device_get_children(cbdev, &devlist, &numdevs);
+	if (device_get_children(cbdev, &devlist, &numdevs) != 0)
+		return;
+
 	/*
 	 * If there are no drivers attached, but there are children,
 	 * then power the card up.