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authorLuciano Coelho <coelho@ti.com>2011-05-12 17:28:29 +0400
committerJohn W. Linville <linville@tuxdriver.com>2011-05-12 22:10:55 +0400
commit85a9994a0a6cba1a6cc6af4bd3ebd85f778be0fe (patch)
treee9dd8fff75d9c0ee2f5aec129bb6132499c72461 /net/wireless/scan.c
parenta3836e02ba4c50db958d32d710b226f2408623dc (diff)
downloadlinux-85a9994a0a6cba1a6cc6af4bd3ebd85f778be0fe.tar.xz
cfg80211/mac80211: avoid bounce back mac->cfg->mac on sched_scan_stopped
When sched_scan_stopped was called by the driver, mac80211 calls cfg80211, which in turn was calling mac80211 back with a flag "driver_initiated". This flag was used so that mac80211 would do the necessary cleanup but would not call the driver. This was enough to prevent the bounce back between the driver and mac80211, but not between mac80211 and cfg80211. To fix this, we now do the cleanup in mac80211 before calling cfg80211. To help with locking issues, the workqueue was moved from cfg80211 to mac80211. Reported-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: Luciano Coelho <coelho@ti.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/wireless/scan.c')
-rw-r--r--net/wireless/scan.c21
1 files changed, 7 insertions, 14 deletions
diff --git a/net/wireless/scan.c b/net/wireless/scan.c
index 65dfae3b9d41..73a441d237b5 100644
--- a/net/wireless/scan.c
+++ b/net/wireless/scan.c
@@ -119,22 +119,14 @@ void cfg80211_sched_scan_results(struct wiphy *wiphy)
}
EXPORT_SYMBOL(cfg80211_sched_scan_results);
-void __cfg80211_sched_scan_stopped(struct work_struct *wk)
+void cfg80211_sched_scan_stopped(struct wiphy *wiphy)
{
- struct cfg80211_registered_device *rdev;
-
- rdev = container_of(wk, struct cfg80211_registered_device,
- sched_scan_stopped_wk);
+ struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
cfg80211_lock_rdev(rdev);
__cfg80211_stop_sched_scan(rdev, true);
cfg80211_unlock_rdev(rdev);
}
-
-void cfg80211_sched_scan_stopped(struct wiphy *wiphy)
-{
- queue_work(cfg80211_wq, &wiphy_to_dev(wiphy)->sched_scan_stopped_wk);
-}
EXPORT_SYMBOL(cfg80211_sched_scan_stopped);
int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev,
@@ -150,10 +142,11 @@ int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev,
dev = rdev->sched_scan_req->dev;
- err = rdev->ops->sched_scan_stop(&rdev->wiphy, dev,
- driver_initiated);
- if (err)
- return err;
+ if (!driver_initiated) {
+ err = rdev->ops->sched_scan_stop(&rdev->wiphy, dev);
+ if (err)
+ return err;
+ }
nl80211_send_sched_scan(rdev, dev, NL80211_CMD_SCHED_SCAN_STOPPED);