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| author | Oleg Nesterov <oleg@tv-sign.ru> | 2007-05-09 02:34:11 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-09 12:30:52 -0700 |
| commit | dfb4b82e1c631b1a6057e77212996a890aa515b7 (patch) | |
| tree | 9e2fcd9ff6bd990740b3f0a48fc4194f2e64d89f /kernel/workqueue.c | |
| parent | f293ea92007419e4f9c52db0cf57af17f45b9f94 (diff) | |
| download | linux-dfb4b82e1c631b1a6057e77212996a890aa515b7.tar.gz linux-dfb4b82e1c631b1a6057e77212996a890aa515b7.tar.bz2 linux-dfb4b82e1c631b1a6057e77212996a890aa515b7.zip | |
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>
Diffstat (limited to 'kernel/workqueue.c')
| -rw-r--r-- | kernel/workqueue.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/workqueue.c b/kernel/workqueue.c index 74f3f7825229..ce72d45c7fd8 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); } |