[PATCH] zd1211rw: fix potential leak in usb_init

usb_init should call destroy_workqueue when usb_register fails.

Signed-off-by: Maxime Austruy <maxime@tralhalla.org>
Signed-off-by: Ulrich Kunitz <kune@deine-taler.de>
Signed-off-by: Daniel Drake <dsd@gentoo.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/zd1211rw/zd_usb.c b/drivers/net/wireless/zd1211rw/zd_usb.c
index 605e96e..2468ad6 100644
--- a/drivers/net/wireless/zd1211rw/zd_usb.c
+++ b/drivers/net/wireless/zd1211rw/zd_usb.c
@@ -1128,6 +1128,7 @@
 
 	r = usb_register(&driver);
 	if (r) {
+		destroy_workqueue(zd_workqueue);
 		printk(KERN_ERR "%s usb_register() failed. Error number %d\n",
 		       driver.name, r);
 		return r;