[PATCH] ath10k: Fix per station tx bit rate reporting

Mohammed Shafi Shajakhan mohammed at qti.qualcomm.com
Fri Jan 13 02:30:03 PST 2017

From: Mohammed Shafi Shajakhan <mohammed at qti.qualcomm.com>

Not clearing the previous tx bit rate status
results in a ambigous tx bit rate reporting to
mac80211/cfg80211, for example the previous bit
rate status would have been marked as legacy rate
, while the current rate would have been an HT/VHT
rate with the tx bit rate flags set and this results
in exporting tx bitrate as legacy rate but with HT/VHT
rate flags set, fix this by clearing the tx bitrate
status for each event. This also fixes the below
warning when we do:

iw dev wlan#N station dump

WARNING: net/wireless/util.c:1222 cfg80211

[<c022f104>] (warn_slowpath_null) from [<bf3b9adc>]
(cfg80211_calculate_bitrate+0x110/0x1f4 [cfg80211])
[<bf3b9adc>] (cfg80211_calculate_bitrate [cfg80211]) from
[<bf3dcd54>] (nl80211_put_sta_rate+0x44/0x1dc [cfg80211])
[<bf3dcd54>] (nl80211_put_sta_rate [cfg80211]) from
[<bf3cbc34>] (nl80211_set_interface+0x724/0xd70 [cfg80211])
[<bf3cbc34>] (nl80211_set_interface [cfg80211]) from
[<bf3d0a18>] (nl80211_dump_station+0xdc/0x100 [cfg80211])
[<bf3d0a18>] (nl80211_dump_station [cfg80211])

Fixes: cec17c382140 ("ath10k: add per peer htt tx stats support for 10.4")
Signed-off-by: Mohammed Shafi Shajakhan <mohammed at qti.qualcomm.com>
 drivers/net/wireless/ath/ath10k/htt_rx.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/wireless/ath/ath10k/htt_rx.c b/drivers/net/wireless/ath/ath10k/htt_rx.c
index 0bc7fe8..74b66e5 100644
--- a/drivers/net/wireless/ath/ath10k/htt_rx.c
+++ b/drivers/net/wireless/ath/ath10k/htt_rx.c
@@ -2231,6 +2231,8 @@ static inline bool is_valid_legacy_rate(u8 rate)
+	memset(&arsta->txrate, 0, sizeof(arsta->txrate));
 	if (txrate.flags == WMI_RATE_PREAMBLE_CCK ||
 	    txrate.flags == WMI_RATE_PREAMBLE_OFDM) {
 		rate = ATH10K_HW_LEGACY_RATE(peer_stats->ratecode);

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