linux-kernel - [PATCH AUTOSEL 3.18 02/61] ath9k: dynack: use authentication messages for 'late' ack

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Message-Id: <20190128162623.59854-2-sashal@kernel.org>
Date:   Mon, 28 Jan 2019 11:25:24 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Lorenzo Bianconi <lorenzo.bianconi@...hat.com>,
        Kalle Valo <kvalo@...eaurora.org>,
        Sasha Levin <sashal@...nel.org>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org
Subject: [PATCH AUTOSEL 3.18 02/61] ath9k: dynack: use authentication messages for 'late' ack

From: Lorenzo Bianconi <lorenzo.bianconi@...hat.com>

[ Upstream commit 3831a2a0010c72e3956020cbf1057a1701a2e469 ]

In order to properly support dynack in ad-hoc mode running
wpa_supplicant, take into account authentication frames for
'late ack' detection. This patch has been tested on devices
mounted on offshore high-voltage stations connected through
~24Km link

Reported-by: Koen Vandeputte <koen.vandeputte@...ntric.com>
Tested-by: Koen Vandeputte <koen.vandeputte@...ntric.com>
Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@...hat.com>
Signed-off-by: Kalle Valo <kvalo@...eaurora.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/wireless/ath/ath9k/dynack.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/ath/ath9k/dynack.c b/drivers/net/wireless/ath/ath9k/dynack.c
index 22b3cc4c27cd..64965bf9034d 100644
--- a/drivers/net/wireless/ath/ath9k/dynack.c
+++ b/drivers/net/wireless/ath/ath9k/dynack.c
@@ -187,7 +187,8 @@ void ath_dynack_sample_tx_ts(struct ath_hw *ah, struct sk_buff *skb,
 	/* late ACK */
 	if (ts->ts_status & ATH9K_TXERR_XRETRY) {
 		if (ieee80211_is_assoc_req(hdr->frame_control) ||
-		    ieee80211_is_assoc_resp(hdr->frame_control)) {
+		    ieee80211_is_assoc_resp(hdr->frame_control) ||
+		    ieee80211_is_auth(hdr->frame_control)) {
 			ath_dbg(common, DYNACK, "late ack\n");
 			ath9k_hw_setslottime(ah, (LATEACK_TO - 3) / 2);
 			ath9k_hw_set_ack_timeout(ah, LATEACK_TO);
-- 
2.19.1