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authorOleg Nesterov <oleg@tv-sign.ru>2007-05-09 02:34:11 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-05-09 12:30:52 -0700
commitdfb4b82e1c631b1a6057e77212996a890aa515b7 (patch)
tree9e2fcd9ff6bd990740b3f0a48fc4194f2e64d89f
parentf293ea92007419e4f9c52db0cf57af17f45b9f94 (diff)
workqueue: make cancel_rearming_delayed_workqueue() work on idle dwork
cancel_rearming_delayed_workqueue(dwork) will hang forever if dwork was not scheduled, because in that case cancel_delayed_work()->del_timer_sync() never returns true. I don't know if there are any callers which may have problems, but this is not so convenient, and the fix is very simple. Q: looks like we don't need "struct workqueue_struct *wq" parameter. If the timer was aborted successfully, get_wq_data() == wq. Is it worth to add the new function? Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--kernel/workqueue.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 74f3f782522..ce72d45c7fd 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -569,6 +569,10 @@ EXPORT_SYMBOL(flush_work_keventd);
void cancel_rearming_delayed_workqueue(struct workqueue_struct *wq,
struct delayed_work *dwork)
{
+ /* Was it ever queued ? */
+ if (!get_wq_data(&dwork->work))
+ return;
+
while (!cancel_delayed_work(dwork))
flush_workqueue(wq);
}