mac80211: rework the pending packets code

The pending packets code is quite incomprehensible, uses memory barriers
nobody really understands, etc. This patch reworks it entirely, using
the queue spinlock, proper stop bits and the skb queues themselves to
indicate whether packets are pending or not (rather than a separate
variable like before).

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Reviewed-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index dac68d476bff..a7430e98c531 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -781,6 +781,8 @@ struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
 
         sta_info_init(local);
 
+        for (i = 0; i < IEEE80211_MAX_QUEUES; i++)
+                skb_queue_head_init(&local->pending[i]);
         tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
                      (unsigned long)local);
         tasklet_disable(&local->tx_pending_tasklet);