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author | Koen Vandeputte <koen.vandeputte@ncentric.com> | 2018-11-05 11:31:12 +0100 |
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committer | Koen Vandeputte <koen.vandeputte@ncentric.com> | 2018-11-06 11:49:55 +0100 |
commit | 779b89c7577de4d7615e2975341fc8ffc580ca09 (patch) | |
tree | 425efd9e54be2e1a007176dc9ca7d7741fe95fe1 /package/kernel/mac80211/patches/554-ath9k-dynack-check-da-enabled-first-in-sampling-rout.patch | |
parent | f9c79947b5c4e726ecf5afd1b04d99f0b4101755 (diff) | |
download | upstream-779b89c7577de4d7615e2975341fc8ffc580ca09.tar.gz upstream-779b89c7577de4d7615e2975341fc8ffc580ca09.tar.bz2 upstream-779b89c7577de4d7615e2975341fc8ffc580ca09.zip |
ath9k: fix dynack in IBSS mode
Currently, dynack was only tested upstream using AP/STA mode.
Testing it on IBSS, showed that late-ack detection was broken.
This is caused due to dynack using Association Request/Response
frames for late-ack detection, which IBSS does not use.
Also allowing Authentication frames here solves this.
A second issue also got fixed, which was also seen AP/STA mode:
When a station was added, the estimated value would be exponentially averaged
using 0 as a starting point.
This means that on larger distances, the ack timeout was still not high
enough before synchronizing would run out of late-ack's for estimation.
Fix this by using the initial estimated value as a baseline
and only start averaging in the following estimation rounds.
Test setup:
- 2x identical devices: RB912UAG-5HPnD + 19dB sector
- IBSS
- 2x2 802.11an (ar9340), HT20, long GI
- RSSI's -70 / -71
- Real distance: 23910 meter
Results (60s iperf runs):
Fixed coverage class 54 (up to 24300m):
* 21.5 Mbits/sec
Dynack:
* 28.9 Mbits/sec
Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>
Diffstat (limited to 'package/kernel/mac80211/patches/554-ath9k-dynack-check-da-enabled-first-in-sampling-rout.patch')
-rw-r--r-- | package/kernel/mac80211/patches/554-ath9k-dynack-check-da-enabled-first-in-sampling-rout.patch | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/554-ath9k-dynack-check-da-enabled-first-in-sampling-rout.patch b/package/kernel/mac80211/patches/554-ath9k-dynack-check-da-enabled-first-in-sampling-rout.patch new file mode 100644 index 0000000000..cc5cdf9233 --- /dev/null +++ b/package/kernel/mac80211/patches/554-ath9k-dynack-check-da-enabled-first-in-sampling-rout.patch @@ -0,0 +1,33 @@ +From: Lorenzo Bianconi <lorenzo.bianconi@redhat.com> +Date: Fri, 2 Nov 2018 21:49:57 +0100 +Subject: [PATCH] ath9k: dynack: check da->enabled first in sampling + routines + +Check da->enabled flag first in ath_dynack_sample_tx_ts and +ath_dynack_sample_ack_ts routines in order to avoid useless +processing + +Tested-by: Koen Vandeputte <koen.vandeputte@ncentric.com> +Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com> +--- + +--- a/drivers/net/wireless/ath/ath9k/dynack.c ++++ b/drivers/net/wireless/ath/ath9k/dynack.c +@@ -178,7 +178,7 @@ void ath_dynack_sample_tx_ts(struct ath_ + u32 dur = ts->duration; + u8 ridx; + +- if ((info->flags & IEEE80211_TX_CTL_NO_ACK) || !da->enabled) ++ if (!da->enabled || (info->flags & IEEE80211_TX_CTL_NO_ACK)) + return; + + spin_lock_bh(&da->qlock); +@@ -251,7 +251,7 @@ void ath_dynack_sample_ack_ts(struct ath + struct ath_common *common = ath9k_hw_common(ah); + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; + +- if (!ath_dynack_bssidmask(ah, hdr->addr1) || !da->enabled) ++ if (!da->enabled || !ath_dynack_bssidmask(ah, hdr->addr1)) + return; + + spin_lock_bh(&da->qlock); |