ieee1394: fix another deadlock in nodemgr

A "modprobe ohci1394; sleep 1.5; modprobe -r ohci1394" could get stuck
in uninterruptible state, especially if an external node was connected.
http://bugzilla.kernel.org/show_bug.cgi?id=7792

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>

diff --git a/drivers/ieee1394/nodemgr.c b/drivers/ieee1394/nodemgr.c
index ba9faef..c5ace19 100644 (file)
--- a/drivers/ieee1394/nodemgr.c
+++ b/drivers/ieee1394/nodemgr.c
@@ -1681,7 +1681,8 @@ static int nodemgr_host_thread(void *__hi)
        for (;;) {
                /* Sleep until next bus reset */
                set_current_state(TASK_INTERRUPTIBLE);
-               if (get_hpsb_generation(host) == generation)
+               if (get_hpsb_generation(host) == generation &&
+                   !kthread_should_stop())
                        schedule();
                __set_current_state(TASK_RUNNING);