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| author | Artem Savkov <artem.savkov@gmail.com> | 2013-03-30 21:20:14 +0400 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2013-03-31 01:33:19 +0400 |
| commit | 90e0970f8788cef2c8f5183af5a98f4f94600faf (patch) | |
| tree | 4245c0e1ab768e3d21e0dcbbf24bd298693543ae | |
| parent | 382a103b2b528a3085cde4ac56fc69d92a828b72 (diff) | |
| download | linux-90e0970f8788cef2c8f5183af5a98f4f94600faf.tar.xz | |
cfg80211: sched_scan_mtx lock in cfg80211_conn_work()
Introduced in f9f475292dbb0e7035fb6661d1524761ea0888d9
("cfg80211: always check for scan end on P2P device")
cfg80211_conn_scan() which requires sched_scan_mtx to be held can be called
from cfg80211_conn_work(). Without this we are hitting multiple warnings like
the following:
WARNING: at net/wireless/sme.c:88 cfg80211_conn_scan+0x1dc/0x3a0 [cfg80211]()
Hardware name: 0578A21
Modules linked in: ...
Pid: 620, comm: kworker/3:1 Not tainted 3.9.0-rc4-next-20130328+ #326
Call Trace:
[<c1036992>] warn_slowpath_common+0x72/0xa0
[<c10369e2>] warn_slowpath_null+0x22/0x30
[<faa4b0ec>] cfg80211_conn_scan+0x1dc/0x3a0 [cfg80211]
[<faa4b344>] cfg80211_conn_do_work+0x94/0x380 [cfg80211]
[<faa4c3b2>] cfg80211_conn_work+0xa2/0x130 [cfg80211]
[<c1051858>] process_one_work+0x198/0x450
Signed-off-by: Artem Savkov <artem.savkov@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
| -rw-r--r-- | net/wireless/sme.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/net/wireless/sme.c b/net/wireless/sme.c index 09d994d192ff..482c70e70127 100644 --- a/net/wireless/sme.c +++ b/net/wireless/sme.c @@ -224,6 +224,7 @@ void cfg80211_conn_work(struct work_struct *work) rtnl_lock(); cfg80211_lock_rdev(rdev); mutex_lock(&rdev->devlist_mtx); + mutex_lock(&rdev->sched_scan_mtx); list_for_each_entry(wdev, &rdev->wdev_list, list) { wdev_lock(wdev); @@ -248,6 +249,7 @@ void cfg80211_conn_work(struct work_struct *work) wdev_unlock(wdev); } + mutex_unlock(&rdev->sched_scan_mtx); mutex_unlock(&rdev->devlist_mtx); cfg80211_unlock_rdev(rdev); rtnl_unlock(); |