diff options
Diffstat (limited to 'drivers/net/wireless/rt2x00/rt2x00queue.c')
| -rw-r--r-- | drivers/net/wireless/rt2x00/rt2x00queue.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/drivers/net/wireless/rt2x00/rt2x00queue.c b/drivers/net/wireless/rt2x00/rt2x00queue.c index e488b944a03..f35d85a71bb 100644 --- a/drivers/net/wireless/rt2x00/rt2x00queue.c +++ b/drivers/net/wireless/rt2x00/rt2x00queue.c @@ -582,6 +582,48 @@ static void rt2x00queue_kick_tx_queue(struct data_queue *queue, queue->rt2x00dev->ops->lib->kick_queue(queue); } +static void rt2x00queue_bar_check(struct queue_entry *entry) +{ + struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; + struct ieee80211_bar *bar = (void *) (entry->skb->data + + rt2x00dev->ops->extra_tx_headroom); + struct rt2x00_bar_list_entry *bar_entry; + + if (likely(!ieee80211_is_back_req(bar->frame_control))) + return; + + bar_entry = kmalloc(sizeof(*bar_entry), GFP_ATOMIC); + + /* + * If the alloc fails we still send the BAR out but just don't track + * it in our bar list. And as a result we will report it to mac80211 + * back as failed. + */ + if (!bar_entry) + return; + + bar_entry->entry = entry; + bar_entry->block_acked = 0; + + /* + * Copy the relevant parts of the 802.11 BAR into out check list + * such that we can use RCU for less-overhead in the RX path since + * sending BARs and processing the according BlockAck should be + * the exception. + */ + memcpy(bar_entry->ra, bar->ra, sizeof(bar->ra)); + memcpy(bar_entry->ta, bar->ta, sizeof(bar->ta)); + bar_entry->control = bar->control; + bar_entry->start_seq_num = bar->start_seq_num; + + /* + * Insert BAR into our BAR check list. + */ + spin_lock_bh(&rt2x00dev->bar_list_lock); + list_add_tail_rcu(&bar_entry->list, &rt2x00dev->bar_list); + spin_unlock_bh(&rt2x00dev->bar_list_lock); +} + int rt2x00queue_write_tx_frame(struct data_queue *queue, struct sk_buff *skb, bool local) { @@ -680,6 +722,11 @@ int rt2x00queue_write_tx_frame(struct data_queue *queue, struct sk_buff *skb, goto out; } + /* + * Put BlockAckReqs into our check list for driver BA processing. + */ + rt2x00queue_bar_check(entry); + set_bit(ENTRY_DATA_PENDING, &entry->flags); rt2x00queue_index_inc(entry, Q_INDEX); |