mac80211: fix ieee80211_xmit call context

ieee80211_xmit() cannot be called with tasklets enabled
because it is normally called from within a tasklet.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 7adaeb2c53e8..a204092e8356 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -2241,5 +2241,12 @@ void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
         if (!encrypt)
                 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
 
+        /*
+         * The other path calling ieee80211_xmit is from the tasklet,
+         * and while we can handle concurrent transmissions locking
+         * requirements are that we do not come into tx with bhs on.
+         */
+        local_bh_disable();
         ieee80211_xmit(sdata, skb);
+        local_bh_enable();
 }