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 <kalle.valo@xxxxxx>
Signed-off-by: Johannes Berg <johannes@xxxxxxxxxxxxxxxx>
---
net/wireless/core.c | 2 ++
1 file changed, 2 insertions(+)
--- wireless-testing.orig/net/wireless/core.c 2009-08-09 11:48:16.000000000 +0200
+++ wireless-testing/net/wireless/core.c 2009-08-09 11:48:32.000000000 +0200
@@ -710,6 +710,7 @@ static int cfg80211_netdev_notifier_call
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
break;
}
wdev_unlock(wdev);
+ mutex_unlock(&rdev->devlist_mtx);
cfg80211_unlock_rdev(rdev);
#endif
break;
--
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