From 0053cc2cfe544cda62a0bc0c2bd26ca7142c74a7 Mon Sep 17 00:00:00 2001
From: Doug Rabson <dfr@FreeBSD.org>
Date: Fri, 21 May 1999 08:23:58 +0000
Subject: [PATCH] Silently return NULL from devclass_get_device if dc == NULL.
 The caller should be handling NULL returns already.

Submitted by: Andrew Gallatin <gallatin@cs.duke.edu>
---
 sys/kern/subr_bus.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sys/kern/subr_bus.c b/sys/kern/subr_bus.c
index 1e70ff17decb..136880ae8f76 100644
--- a/sys/kern/subr_bus.c
+++ b/sys/kern/subr_bus.c
@@ -23,7 +23,7 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- *	$Id: subr_bus.c,v 1.22 1999/05/14 09:13:43 dfr Exp $
+ *	$Id: subr_bus.c,v 1.23 1999/05/14 11:22:42 dfr Exp $
  */
 
 #include <sys/param.h>
@@ -409,7 +409,7 @@ devclass_get_name(devclass_t dc)
 device_t
 devclass_get_device(devclass_t dc, int unit)
 {
-    if (unit < 0 || unit >= dc->maxunit)
+    if (dc == NULL || unit < 0 || unit >= dc->maxunit)
 	return NULL;
     return dc->devices[unit];
 }