netdev - [PATCH] wcn36xx: Fix missing frame timestamp for beacon/probe-resp

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Message-Id: <1629992768-23785-1-git-send-email-loic.poulain@linaro.org>
Date:   Thu, 26 Aug 2021 17:46:08 +0200
From:   Loic Poulain <loic.poulain@...aro.org>
To:     kvalo@...eaurora.org
Cc:     linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        Loic Poulain <loic.poulain@...aro.org>
Subject: [PATCH] wcn36xx: Fix missing frame timestamp for beacon/probe-resp

When receiving a beacon or probe response, we should update the
boottime_ns field which is the timestamp the frame was received at.
(cf mac80211.h)

This fixes a scanning issue with Android since it relies on this
timestamp to determine when the AP has been seen for the last time
(via the nl80211 BSS_LAST_SEEN_BOOTTIME parameter).

Signed-off-by: Loic Poulain <loic.poulain@...aro.org>
Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@...aro.org>
---
 drivers/net/wireless/ath/wcn36xx/txrx.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/wireless/ath/wcn36xx/txrx.c b/drivers/net/wireless/ath/wcn36xx/txrx.c
index 1b83115..cab196b 100644
--- a/drivers/net/wireless/ath/wcn36xx/txrx.c
+++ b/drivers/net/wireless/ath/wcn36xx/txrx.c
@@ -287,6 +287,10 @@ int wcn36xx_rx_skb(struct wcn36xx *wcn, struct sk_buff *skb)
 		status.rate_idx = 0;
 	}
 
+	if (ieee80211_is_beacon(hdr->frame_control) ||
+	    ieee80211_is_probe_resp(hdr->frame_control))
+		status.boottime_ns = ktime_get_boottime_ns();
+
 	memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status));
 
 	if (ieee80211_is_beacon(hdr->frame_control)) {
-- 
2.7.4