ath9k_htc: Fix disconnect issue in HT40 mode.

commit 71ba186c123630ddab17667ec9ecf7e2ef211295 upstream.

Some APs advertise that they may be HT40 capable in the capabilites
but the current operating channel configuration may be only HT20.
This causes disconnection as ath9k_htc sets WLAN_RC_40_FLAG despite
the AP operating in HT20 mode.
Hence set this flag only if the current channel configuration
is HT40 enabled.

Signed-off-by: Vivek Natarajan <vnatarajan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/net/wireless/ath/ath9k/htc_drv_main.c b/drivers/net/wireless/ath/ath9k/htc_drv_main.c
index 9d371c18eb41c2da10e88daf2033259b6ad1657f..5f3c47d186d081ac6086b8ec9fb454484e8a00c5 100644 (file)
--- a/drivers/net/wireless/ath/ath9k/htc_drv_main.c
+++ b/drivers/net/wireless/ath/ath9k/htc_drv_main.c
@@ -370,7 +370,8 @@ static int ath9k_htc_init_rate(struct ath9k_htc_priv *priv,
                priv->tgt_rate.rates.ht_rates.rs_nrates = j;
 
                caps = WLAN_RC_HT_FLAG;
-               if (sta->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)
+               if ((sta->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
+                   (conf_is_ht40(&priv->hw->conf)))
                        caps |= WLAN_RC_40_FLAG;
                if (sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_40)
                        caps |= WLAN_RC_SGI_FLAG;