From: Eyal Shapira Date: Thu, 4 Sep 2014 19:37:55 +0000 (+0300) Subject: mac80211: fix broken use of VHT/20Mhz with some APs X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=f3000e1b43f164802f2a74c9de6a398943a36378;p=sagit-ice-cold%2Fkernel_xiaomi_msm8998.git mac80211: fix broken use of VHT/20Mhz with some APs commit "mac80211: disable 40MHz support in case of 20MHz AP" broke working VHT in 20Mhz with APs like Netgear R6300v2 which do not publish support for 40Mhz but allow use of VHT in 20Mhz. The break is because VHT is disabled once no HT cap doesn't indicate support for 40Mhz. This causes the assoc request to be sent without any VHT IE and the association is only HT due to this. For more details check out commit 4a817aa7 "mac80211: allow VHT with peers not capable of 40MHz" Fixes: 53b954ee4a71 ("mac80211: disable 40MHz support in case of 20MHz AP") Signed-off-by: Eyal Shapira Signed-off-by: Emmanuel Grumbach Signed-off-by: Johannes Berg --- diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index 27231ac2dbdd..f09bef7ac21d 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -173,7 +173,7 @@ ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata, if (!(ht_cap->cap_info & cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) { - ret = IEEE80211_STA_DISABLE_40MHZ | IEEE80211_STA_DISABLE_VHT; + ret = IEEE80211_STA_DISABLE_40MHZ; goto out; }