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| author | Alban Browaeys <prahal@yahoo.com> | 2009-11-25 15:13:00 +0100 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2009-11-28 15:05:00 -0500 |
| commit | e60d7443e00a72a2c056950cdaab79c7b077f3d4 (patch) | |
| tree | 0d2376434a0f44ac2b30bba0af3cdcb8e5421c90 /net/wireless/core.c | |
| parent | ece1e3c61e59ba184150e5aff57bbc6355613e3e (diff) | |
| download | kernel_samsung_smdk4412-e60d7443e00a72a2c056950cdaab79c7b077f3d4.zip kernel_samsung_smdk4412-e60d7443e00a72a2c056950cdaab79c7b077f3d4.tar.gz kernel_samsung_smdk4412-e60d7443e00a72a2c056950cdaab79c7b077f3d4.tar.bz2 | |
wireless : use a dedicated workqueue for cfg80211.
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>
Diffstat (limited to 'net/wireless/core.c')
| -rw-r--r-- | net/wireless/core.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/net/wireless/core.c b/net/wireless/core.c index fe6f402..c2a2c56 100644 --- a/net/wireless/core.c +++ b/net/wireless/core.c @@ -45,6 +45,9 @@ DEFINE_MUTEX(cfg80211_mutex); /* for debugfs */ static struct dentry *ieee80211_debugfs_dir; +/* for the cleanup, scan and event works */ +struct workqueue_struct *cfg80211_wq; + /* requires cfg80211_mutex to be held! */ struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx) { @@ -727,7 +730,7 @@ static int cfg80211_netdev_notifier_call(struct notifier_block * nb, break; case NETDEV_DOWN: dev_hold(dev); - schedule_work(&wdev->cleanup_work); + queue_work(cfg80211_wq, &wdev->cleanup_work); break; case NETDEV_UP: /* @@ -845,8 +848,14 @@ static int __init cfg80211_init(void) if (err) goto out_fail_reg; + cfg80211_wq = create_singlethread_workqueue("cfg80211"); + if (!cfg80211_wq) + goto out_fail_wq; + return 0; +out_fail_wq: + regulatory_exit(); out_fail_reg: debugfs_remove(ieee80211_debugfs_dir); out_fail_nl80211: @@ -868,5 +877,6 @@ static void cfg80211_exit(void) wiphy_sysfs_exit(); regulatory_exit(); unregister_pernet_device(&cfg80211_pernet_ops); + destroy_workqueue(cfg80211_wq); } module_exit(cfg80211_exit); |