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wireless : use a dedicated workqueue for cfg80211.

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This patch moves the works cleanup, scan and events to a cfg80211
dedicated workqueue.

Platform driver like eeepc-laptop ought to use works to rfkill (as
new rfkill does lock in rfkill_unregister and the platform driver is
called from rfkill_switch_all which also lock the same mutex).
This raise a new issue in itself that the work scheduled by the platform
driver to the global worqueue calls wiphy_unregister which flush_work
scan and event works (which thus flush works on the global workqueue inside
a work on the global workqueue) and also put on hold the  wdev_cleanup_work
 (which prevents the dev_put on netdev thus indefinite Usage count error on
wifi device).

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Alban Browaeys <prahal@yahoo.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Alban Browaeys
2009-11-25 15:13:00 +01:00
committed by John W. Linville
parent ece1e3c61e
commit e60d7443e0
5 changed files with 18 additions and 6 deletions
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net/wireless/scan.c
+1 -1
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@@ -88,7 +88,7 @@ void cfg80211_scan_done(struct cfg80211_scan_request *request, bool aborted)
WARN_ON(request != wiphy_to_dev(request->wiphy)->scan_req);
request->aborted = aborted;
schedule_work(&wiphy_to_dev(request->wiphy)->scan_done_wk);
queue_work(cfg80211_wq, &wiphy_to_dev(request->wiphy)->scan_done_wk);
}
EXPORT_SYMBOL(cfg80211_scan_done);