PERFORCE change 139836 for review

[Hans Petter Selasky]

http://perforce.freebsd.org/chv.cgi?CH=139836

Change 139836 by hselasky at hselasky_laptop001 on 2008/04/11 20:00:50

	
	Bugfix: We need to lock the global USB mutex
	when setting the configuration and alternate
	setting until further.

Affected files ...

.. //depot/projects/usb/src/sys/dev/usb/ugen.c#40 edit

Differences ...

==== //depot/projects/usb/src/sys/dev/usb/ugen.c#40 (text+ko) ====

@@ -1719,7 +1719,9 @@
 			error = EPERM;
 			break;
 		}
+		mtx_lock(&usb_global_lock);
 		error = ugen_set_config(sc, *(int *)addr);
+		mtx_unlock(&usb_global_lock);
 		if (error) {
 			break;
 		}
@@ -1740,7 +1742,9 @@
 			error = EPERM;
 			break;
 		}
+		mtx_lock(&usb_global_lock);
 		error = ugen_set_interface(sc, ai->uai_interface_index, ai->uai_alt_no);
+		mtx_unlock(&usb_global_lock);
 		if (error) {
 			break;
 		}