svn commit: r226175 - head/sys/kern

[Marius Strobl]

Author: marius
Date: Sun Oct  9 21:21:37 2011
New Revision: 226175
URL: http://svn.freebsd.org/changeset/base/226175

Log:
  In device_get_children() avoid malloc(0) in order to increase portability
  to other operating systems.
  
  PR:     154287

Modified:
  head/sys/kern/subr_bus.c

Modified: head/sys/kern/subr_bus.c
==============================================================================
--- head/sys/kern/subr_bus.c	Sun Oct  9 20:58:02 2011	(r226174)
+++ head/sys/kern/subr_bus.c	Sun Oct  9 21:21:37 2011	(r226175)
@@ -2140,6 +2140,11 @@ device_get_children(device_t dev, device
 	TAILQ_FOREACH(child, &dev->children, link) {
 		count++;
 	}
+	if (count == 0) {
+		*devlistp = NULL;
+		*devcountp = 0;
+		return (0);
+	}
 
 	list = malloc(count * sizeof(device_t), M_TEMP, M_NOWAIT|M_ZERO);
 	if (!list)