From 91b12089b18a17cf510f636e29c2cb3a901fe7a5 Mon Sep 17 00:00:00 2001 From: Michal Kazior Date: Fri, 12 Dec 2014 12:41:35 +0100 Subject: [PATCH] ath10k: improve 11b coex Some firmware revisions need peer phymode to be specified as MODE_11B when associating as station to a 11b AP. Otherwise they can starve other stations. Signed-off-by: Michal Kazior Signed-off-by: Kalle Valo --- drivers/net/wireless/ath/ath10k/mac.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c index fe61201d2e72..950322d646a5 100644 --- a/drivers/net/wireless/ath/ath10k/mac.c +++ b/drivers/net/wireless/ath/ath10k/mac.c @@ -1416,6 +1416,12 @@ static void ath10k_peer_assoc_h_qos(struct ath10k *ar, } } +static bool ath10k_mac_sta_has_11g_rates(struct ieee80211_sta *sta) +{ + /* First 4 rates in ath10k_rates are CCK (11b) rates. */ + return sta->supp_rates[IEEE80211_BAND_2GHZ] >> 4; +} + static void ath10k_peer_assoc_h_phymode(struct ath10k *ar, struct ieee80211_vif *vif, struct ieee80211_sta *sta, @@ -1430,8 +1436,10 @@ static void ath10k_peer_assoc_h_phymode(struct ath10k *ar, phymode = MODE_11NG_HT40; else phymode = MODE_11NG_HT20; - } else { + } else if (ath10k_mac_sta_has_11g_rates(sta)) { phymode = MODE_11G; + } else { + phymode = MODE_11B; } break; @@ -4724,6 +4732,9 @@ static const struct ieee80211_channel ath10k_5ghz_channels[] = { CHAN5G(165, 5825, 0), }; +/* Note: Be careful if you re-order these. There is code which depends on this + * ordering. + */ static struct ieee80211_rate ath10k_rates[] = { /* CCK */ RATETAB_ENT(10, 0x82, 0),