[PATCH] rmmod ohci1394 hangs

this sequence of commands will hang the final rmmod.

	init=/bin/bash --login
	mount proc
	modprove -v ohci1394
	rmmod ohci1394
	modprobe -v ohci1394
	rmmod ohci1394  ->  hangs

knodemgrd_0 exits on the first rmmod, but leaves nodemgr_serialize in down
state.

This fixes it for me.
Signed-off-by: Olaf Hering <olh@suse.de>
Acked-by: Ben Collins <bcollins@debian.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

drivers/ieee1394/nodemgr.c

@@ -1488,8 +1488,10 @@ static int nodemgr_host_thread(void *__hi)
 			break;
 		}
 
-		if (hi->kill_me)
+		if (hi->kill_me) {
+			up(&nodemgr_serialize);
 			break;
+		}
 
 		/* Pause for 1/4 second in 1/16 second intervals,
 		 * to make sure things settle down. */
@@ -1513,8 +1515,10 @@ static int nodemgr_host_thread(void *__hi)
 				i = 0;
 
 			/* Check the kill_me again */
-			if (hi->kill_me)
+			if (hi->kill_me) {
+				up(&nodemgr_serialize);
 				goto caught_signal;
+			}
 		}
 
 		if (!nodemgr_check_irm_capability(host, reset_cycles)) {