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authorFelix Fietkau <nbd@nbd.name>2021-02-14 19:55:09 +0100
committerFelix Fietkau <nbd@nbd.name>2021-02-14 19:55:45 +0100
commitf118be07126e88f2fd393909675d815e0b0fd315 (patch)
tree569f72ee93dfe615de03ad8abbe9f60a2ba7f130 /package/kernel/mac80211/patches/ath
parentbc3963764d5a3bc2371a890dbe76d3b6dc131d10 (diff)
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ath9k: fix transmitting to stations in dynamic SMPS mode
When transmitting to a receiver in dynamic SMPS mode, all transmissions that use multiple spatial streams need to be sent using CTS-to-self or RTS/CTS to give the receiver's extra chains some time to wake up. This fixes the tx rate getting stuck at <= MCS7 for some clients, especially Intel ones, which make aggressive use of SMPS. Signed-off-by: Felix Fietkau <nbd@nbd.name>
Diffstat (limited to 'package/kernel/mac80211/patches/ath')
-rw-r--r--package/kernel/mac80211/patches/ath/560-ath9k-fix-transmitting-to-stations-in-dynamic-SMPS-m.patch49
1 files changed, 49 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/ath/560-ath9k-fix-transmitting-to-stations-in-dynamic-SMPS-m.patch b/package/kernel/mac80211/patches/ath/560-ath9k-fix-transmitting-to-stations-in-dynamic-SMPS-m.patch
new file mode 100644
index 0000000000..68f3a31548
--- /dev/null
+++ b/package/kernel/mac80211/patches/ath/560-ath9k-fix-transmitting-to-stations-in-dynamic-SMPS-m.patch
@@ -0,0 +1,49 @@
+From: Felix Fietkau <nbd@nbd.name>
+Date: Sun, 14 Feb 2021 19:45:50 +0100
+Subject: [PATCH] ath9k: fix transmitting to stations in dynamic SMPS mode
+
+When transmitting to a receiver in dynamic SMPS mode, all transmissions that
+use multiple spatial streams need to be sent using CTS-to-self or RTS/CTS to
+give the receiver's extra chains some time to wake up.
+This fixes the tx rate getting stuck at <= MCS7 for some clients, especially
+Intel ones, which make aggressive use of SMPS.
+
+Cc: stable@vger.kernel.org
+Reported-by: Martin Kennedy <hurricos@gmail.com>
+Signed-off-by: Felix Fietkau <nbd@nbd.name>
+---
+
+--- a/drivers/net/wireless/ath/ath9k/ath9k.h
++++ b/drivers/net/wireless/ath/ath9k/ath9k.h
+@@ -179,7 +179,8 @@ struct ath_frame_info {
+ s8 txq;
+ u8 keyix;
+ u8 rtscts_rate;
+- u8 retries : 7;
++ u8 retries : 6;
++ u8 dyn_smps : 1;
+ u8 baw_tracked : 1;
+ u8 tx_power;
+ enum ath9k_key_type keytype:2;
+--- a/drivers/net/wireless/ath/ath9k/xmit.c
++++ b/drivers/net/wireless/ath/ath9k/xmit.c
+@@ -1271,6 +1271,11 @@ static void ath_buf_set_rate(struct ath_
+ is_40, is_sgi, is_sp);
+ if (rix < 8 && (tx_info->flags & IEEE80211_TX_CTL_STBC))
+ info->rates[i].RateFlags |= ATH9K_RATESERIES_STBC;
++ if (rix >= 8 && fi->dyn_smps) {
++ info->rates[i].RateFlags |=
++ ATH9K_RATESERIES_RTS_CTS;
++ info->flags |= ATH9K_TXDESC_CTSENA;
++ }
+
+ info->txpower[i] = ath_get_rate_txpower(sc, bf, rix,
+ is_40, false);
+@@ -2114,6 +2119,7 @@ static void setup_frame_info(struct ieee
+ fi->keyix = an->ps_key;
+ else
+ fi->keyix = ATH9K_TXKEYIX_INVALID;
++ fi->dyn_smps = sta && sta->smps_mode == IEEE80211_SMPS_DYNAMIC;
+ fi->keytype = keytype;
+ fi->framelen = framelen;
+ fi->tx_power = txpower;