From: Johannes Berg <[email protected]>
cfg80211_stop_p2p_device() requires the devlist_mtx to
be held, but nl80211_stop_p2p_device() doesn't acquire
it which is a locking error and causes a warning (when
lockdep is enabled). Fix this.
Signed-off-by: Johannes Berg <[email protected]>
---
net/wireless/nl80211.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 212d2aa..3abcbba 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -8159,9 +8159,11 @@ static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
if (!rdev->ops->stop_p2p_device)
return -EOPNOTSUPP;
+ mutex_lock(&rdev->devlist_mtx);
mutex_lock(&rdev->sched_scan_mtx);
cfg80211_stop_p2p_device(rdev, wdev);
mutex_unlock(&rdev->sched_scan_mtx);
+ mutex_unlock(&rdev->devlist_mtx);
return 0;
}
--
1.8.0
From: Johannes Berg <[email protected]>
In cfg80211_can_use_iftype_chan(), check for P2P Device
first, and then for netdevs. This doesn't really change
anything but makes the code a bit easier to read since
it may not be obvious for everyone at first that a P2P
device has no netdev.
Signed-off-by: Johannes Berg <[email protected]>
---
net/wireless/util.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/net/wireless/util.c b/net/wireless/util.c
index 3d8a133..a7046a4 100644
--- a/net/wireless/util.c
+++ b/net/wireless/util.c
@@ -1278,12 +1278,12 @@ int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev,
list_for_each_entry(wdev_iter, &rdev->wdev_list, list) {
if (wdev_iter == wdev)
continue;
- if (wdev_iter->netdev) {
- if (!netif_running(wdev_iter->netdev))
- continue;
- } else if (wdev_iter->iftype == NL80211_IFTYPE_P2P_DEVICE) {
+ if (wdev_iter->iftype == NL80211_IFTYPE_P2P_DEVICE) {
if (!wdev_iter->p2p_started)
continue;
+ } else if (wdev_iter->netdev) {
+ if (!netif_running(wdev_iter->netdev))
+ continue;
} else {
WARN_ON(1);
}
--
1.8.0