From 75e296e9b22aef6fa467523ace87ef623dac1fad Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Fri, 31 Jan 2020 13:12:39 +0200 Subject: [PATCH] mac80211: simplify and improve HT/VHT/HE disable code Check early on that a device has support for QoS (at least 4 queues) when it supports HT/VHT/HE, so we don't have to check this while connecting. This lets us clean up the code there: move some of it into channel preparation to clean up a bit more, and then change the logic to only check the "wmm_used" flag. Additionally, disable HE consistently when VHT is disabled. Signed-off-by: Johannes Berg Signed-off-by: Luca Coelho Link: https://lore.kernel.org/r/20200131111300.891737-3-luca@coelho.fi Signed-off-by: Johannes Berg --- net/mac80211/main.c | 5 +++++ net/mac80211/mlme.c | 62 ++++++++++++++++++++++++++++------------------------- 2 files changed, 38 insertions(+), 29 deletions(-) diff --git a/net/mac80211/main.c b/net/mac80211/main.c index 4c2b5ba..34728cf 100644 --- a/net/mac80211/main.c +++ b/net/mac80211/main.c @@ -981,6 +981,11 @@ int ieee80211_register_hw(struct ieee80211_hw *hw) if (!supp_he) supp_he = !!ieee80211_get_he_sta_cap(sband); + /* HT, VHT, HE require QoS, thus >= 4 queues */ + if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS && + (supp_ht || supp_vht || supp_he))) + return -EINVAL; + if (!sband->ht_cap.ht_supported) continue; diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index cb6fd0a..f076e73 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -164,7 +164,9 @@ ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata, chandef->center_freq1 = channel->center_freq; if (!ht_oper || !sta_ht_cap.ht_supported) { - ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; + ret = IEEE80211_STA_DISABLE_HT | + IEEE80211_STA_DISABLE_VHT | + IEEE80211_STA_DISABLE_HE; goto out; } @@ -185,7 +187,9 @@ ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata, "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", channel->center_freq, ht_cfreq, ht_oper->primary_chan, channel->band); - ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; + ret = IEEE80211_STA_DISABLE_HT | + IEEE80211_STA_DISABLE_VHT | + IEEE80211_STA_DISABLE_HE; goto out; } @@ -301,7 +305,8 @@ out: IEEE80211_CHAN_DISABLED)) { if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) { ret = IEEE80211_STA_DISABLE_HT | - IEEE80211_STA_DISABLE_VHT; + IEEE80211_STA_DISABLE_VHT | + IEEE80211_STA_DISABLE_HE; break; } @@ -393,6 +398,7 @@ static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata, if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT | + IEEE80211_STA_DISABLE_HE | IEEE80211_STA_DISABLE_40MHZ | IEEE80211_STA_DISABLE_80P80MHZ | IEEE80211_STA_DISABLE_160MHZ)) || @@ -4760,10 +4766,22 @@ static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, IEEE80211_STA_DISABLE_80P80MHZ | IEEE80211_STA_DISABLE_160MHZ); + /* disable HT/VHT/HE if we don't support them */ + if (!sband->ht_cap.ht_supported) { + ifmgd->flags |= IEEE80211_STA_DISABLE_HT; + ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; + ifmgd->flags |= IEEE80211_STA_DISABLE_HE; + } + + if (!sband->vht_cap.vht_supported) + ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; + + if (!ieee80211_get_he_sta_cap(sband)) + ifmgd->flags |= IEEE80211_STA_DISABLE_HE; + rcu_read_lock(); - if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && - sband->ht_cap.ht_supported) { + if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { const u8 *ht_oper_ie, *ht_cap_ie; ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION); @@ -4780,8 +4798,7 @@ static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, } } - if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && - sband->vht_cap.vht_supported) { + if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { const u8 *vht_oper_ie, *vht_cap; vht_oper_ie = ieee80211_bss_get_ie(cbss, @@ -4791,9 +4808,10 @@ static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, if (vht_oper && !ht_oper) { vht_oper = NULL; sdata_info(sdata, - "AP advertised VHT without HT, disabling both\n"); + "AP advertised VHT without HT, disabling HT/VHT/HE\n"); ifmgd->flags |= IEEE80211_STA_DISABLE_HT; ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; + ifmgd->flags |= IEEE80211_STA_DISABLE_HE; } vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY); @@ -4803,9 +4821,6 @@ static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, } } - if (!ieee80211_get_he_sta_cap(sband)) - ifmgd->flags |= IEEE80211_STA_DISABLE_HE; - if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) { const struct cfg80211_bss_ies *ies; const u8 *he_oper_ie; @@ -5304,27 +5319,15 @@ int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, } } - /* Also disable HT if we don't support it or the AP doesn't use WMM */ sband = local->hw.wiphy->bands[req->bss->channel->band]; - if (!sband->ht_cap.ht_supported || - local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used || - ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { - ifmgd->flags |= IEEE80211_STA_DISABLE_HT; - if (!bss->wmm_used && - !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM)) - netdev_info(sdata->dev, - "disabling HT as WMM/QoS is not supported by the AP\n"); - } - /* disable VHT if we don't support it or the AP doesn't use WMM */ - if (!sband->vht_cap.vht_supported || - local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used || - ifmgd->flags & IEEE80211_STA_DISABLE_WMM) { + /* also disable HT/VHT/HE if the AP doesn't use WMM */ + if (!bss->wmm_used) { + ifmgd->flags |= IEEE80211_STA_DISABLE_HT; ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; - if (!bss->wmm_used && - !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM)) - netdev_info(sdata->dev, - "disabling VHT as WMM/QoS is not supported by the AP\n"); + ifmgd->flags |= IEEE80211_STA_DISABLE_HE; + netdev_info(sdata->dev, + "disabling HT/VHT/HE as WMM/QoS is not supported by the AP\n"); } memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); @@ -5456,6 +5459,7 @@ int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, if (req->flags & ASSOC_REQ_DISABLE_HT) { ifmgd->flags |= IEEE80211_STA_DISABLE_HT; ifmgd->flags |= IEEE80211_STA_DISABLE_VHT; + ifmgd->flags |= IEEE80211_STA_DISABLE_HE; } if (req->flags & ASSOC_REQ_DISABLE_VHT) -- 2.7.4