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 <[EMAIL PROTECTED]>
--- 6.20-rc6-mm3/kernel/workqueue.c~3_cdw 2007-02-06 23:09:34.000000000
+0300
+++ 6.20-rc6-mm3/kernel/workqueue.c 2007-02-06 23:42:43.000000000 +0300
@@ -565,6 +565,10 @@ 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);
}
-
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