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ath6kl: pass only unicast frames for aggregation 

When pinging form ar6003 to the AP RTT was high even when power save was
disabled:

100 packets transmitted, 97 received, 3% packet loss, time 99125ms
rtt min/avg/max/mdev = 1.875/46.733/795.506/139.181 ms

After some investigation one reason for this was that received
multicast traffic confused the aggrecation logic and caused 400 ms
timeouts when receiving multicast frames from AP.

A simple way to fix is to pass only unicast frames for aggregation. This
improves RTT:

100 packets transmitted, 99 received, 1% packet loss, time 99144ms
rtt min/avg/max/mdev = 2.083/13.084/403.390/56.794 ms

Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
This commit is contained in:
Kalle Valo 2011-09-19 21:38:44 +03:00
parent 865121361f
commit 5694f96296
1 changed files with 9 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
drivers/net/wireless/ath/ath6kl/txrx.c
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@ -1230,9 +1230,15 @@ void ath6kl_rx(struct htc_target *target, struct htc_packet *packet)
ath6kl_data_tx(skb1, ar->net_dev);
}
if (!aggr_process_recv_frm(ar->aggr_cntxt, tid, seq_no,
is_amsdu, skb))
ath6kl_deliver_frames_to_nw_stack(ar->net_dev, skb);
datap = (struct ethhdr *) skb->data;
if (is_unicast_ether_addr(datap->h_dest) &&
aggr_process_recv_frm(ar->aggr_cntxt, tid, seq_no,
is_amsdu, skb))
/* aggregation code will handle the skb */
return;
ath6kl_deliver_frames_to_nw_stack(ar->net_dev, skb);
}
static void aggr_timeout(unsigned long arg)
@ -1249,10 +1255,6 @@ static void aggr_timeout(unsigned long arg)
if (!rxtid->aggr || !rxtid->timer_mon || rxtid->progress)
continue;
/*
* FIXME: these timeouts happen quite fruently, something
* line once within 60 seconds. Investigate why.
*/
stats->num_timeouts++;
ath6kl_dbg(ATH6KL_DBG_AGGR,
"aggr timeout (st %d end %d)\n",