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cfg80211: add missing device list locking

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When calling into the wext code from the NETDEV_UP
notifier, we need to hold the devlist_mtx mutex as
the wext code ends up calling into channel checks.

Reported-by: Kalle Valo <[email protected]>
Signed-off-by: Johannes Berg <[email protected]>
Tested-by: Kalle Valo <[email protected]>
Signed-off-by: John W. Linville <[email protected]>
This commit is contained in:
Johannes Berg 2009-08-09 11:51:29 +02:00 • committed by John W. Linville
commit aee83eaff8
1 changed files with 2 additions and 0 deletions
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2
net/wireless/core.c
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@ -710,6 +710,7 @@ static int cfg80211_netdev_notifier_call(struct notifier_block * nb,
case NETDEV_UP:
#ifdef CONFIG_WIRELESS_EXT
cfg80211_lock_rdev(rdev);
mutex_lock(&rdev->devlist_mtx);
wdev_lock(wdev);
switch (wdev->iftype) {
case NL80211_IFTYPE_ADHOC:
@ -722,6 +723,7 @@ static int cfg80211_netdev_notifier_call(struct notifier_block * nb,
break;
}
wdev_unlock(wdev);
mutex_unlock(&rdev->devlist_mtx);
cfg80211_unlock_rdev(rdev);
#endif
break;