diff options
| -rw-r--r-- | net/mac802154/tx.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/net/mac802154/tx.c b/net/mac802154/tx.c index 6188f42276e7..5b471e932271 100644 --- a/net/mac802154/tx.c +++ b/net/mac802154/tx.c @@ -132,6 +132,25 @@ int ieee802154_sync_and_hold_queue(struct ieee802154_local *local) return ret; } +static bool ieee802154_netif_is_down(struct ieee802154_local *local) +{ + struct ieee802154_sub_if_data *sdata; + bool is_down = true; + + rcu_read_lock(); + list_for_each_entry_rcu(sdata, &local->interfaces, list) { + if (!sdata->dev) + continue; + + is_down = !netif_running(sdata->dev); + if (is_down) + break; + } + rcu_read_unlock(); + + return is_down; +} + int ieee802154_mlme_op_pre(struct ieee802154_local *local) { return ieee802154_sync_and_hold_queue(local); @@ -152,6 +171,14 @@ int ieee802154_mlme_tx(struct ieee802154_local *local, struct sk_buff *skb) return -ENETDOWN; } + /* Warn if the ieee802154 core thinks MLME frames can be sent while the + * net interface expects this cannot happen. + */ + if (WARN_ON_ONCE(ieee802154_netif_is_down(local))) { + rtnl_unlock(); + return -ENETDOWN; + } + ieee802154_tx(local, skb); ret = ieee802154_sync_queue(local); |