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amt: cancel delayed_work synchronously in amt_fini() 

When the amt module is being removed, it calls cancel_delayed_work()
to cancel pending delayed_work. But this function doesn't wait for
canceling delayed_work.
So, workers can be still doing after module delete.

In order to avoid this, cancel_delayed_work_sync() should be used instead.

Suggested-by: Jakub Kicinski <kuba@kernel.org>
Fixes: bc54e49c14 ("amt: add multicast(IGMP) report message handler")
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Link: https://lore.kernel.org/r/20211116160923.25258-1-ap420073@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Taehee Yoo 2021-11-16 16:09:23 +00:00 committed by Jakub Kicinski
parent 0a83f96f87
commit b0024a04e4
1 changed files with 1 additions and 1 deletions
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2
drivers/net/amt.c
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@ -3286,7 +3286,7 @@ static void __exit amt_fini(void)
{
rtnl_link_unregister(&amt_link_ops);
unregister_netdevice_notifier(&amt_notifier_block);
cancel_delayed_work(&source_gc_wq);
cancel_delayed_work_sync(&source_gc_wq);
__amt_source_gc_work();
destroy_workqueue(amt_wq);
}