mac80211: cancel restart_work explicitly instead of depending on flush_scheduled_work()

iee80211_hw->restart_work is the only work which uses the system
workqueue.  Instead of calling flush_scheduled_work() during
iee80211_exit(), cancel the work during unregistration.

This is to prepare for the deprecation and removal of
flush_scheduled_work().

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index 22bc42b..6b322fa 100644 (file)
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -748,7 +748,7 @@ int ieee80211_register_hw(struct ieee80211_hw *hw)
                hw->queues = IEEE80211_MAX_QUEUES;
 
        local->workqueue =
-               create_singlethread_workqueue(wiphy_name(local->hw.wiphy));
+               alloc_ordered_workqueue(wiphy_name(local->hw.wiphy), 0);
        if (!local->workqueue) {
                result = -ENOMEM;
                goto fail_workqueue;
@@ -962,12 +962,6 @@ static void __exit ieee80211_exit(void)
        rc80211_minstrel_ht_exit();
        rc80211_minstrel_exit();
 
-       /*
-        * For key todo, it'll be empty by now but the work
-        * might still be scheduled.
-        */
-       flush_scheduled_work();
-
        if (mesh_allocated)
                ieee80211s_stop();