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-rw-r--r--net/mac80211/mlme.c30
1 files changed, 22 insertions, 8 deletions
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 0e8d59a0e17e..29fe91d6a094 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -149,6 +149,7 @@ static u32
ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
struct ieee80211_supported_band *sband,
struct ieee80211_channel *channel,
+ const struct ieee80211_ht_cap *ht_cap,
const struct ieee80211_ht_operation *ht_oper,
const struct ieee80211_vht_operation *vht_oper,
struct cfg80211_chan_def *chandef, bool tracking)
@@ -162,13 +163,19 @@ ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
chandef->center_freq1 = channel->center_freq;
chandef->center_freq2 = 0;
- if (!ht_oper || !sband->ht_cap.ht_supported) {
+ if (!ht_cap || !ht_oper || !sband->ht_cap.ht_supported) {
ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
goto out;
}
chandef->width = NL80211_CHAN_WIDTH_20;
+ if (!(ht_cap->cap_info &
+ cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) {
+ ret = IEEE80211_STA_DISABLE_40MHZ | IEEE80211_STA_DISABLE_VHT;
+ goto out;
+ }
+
ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
channel->band);
/* check that channel matches the right operating channel */
@@ -328,6 +335,7 @@ out:
static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
struct sta_info *sta,
+ const struct ieee80211_ht_cap *ht_cap,
const struct ieee80211_ht_operation *ht_oper,
const struct ieee80211_vht_operation *vht_oper,
const u8 *bssid, u32 *changed)
@@ -367,8 +375,9 @@ static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
sband = local->hw.wiphy->bands[chan->band];
/* calculate new channel (type) based on HT/VHT operation IEs */
- flags = ieee80211_determine_chantype(sdata, sband, chan, ht_oper,
- vht_oper, &chandef, true);
+ flags = ieee80211_determine_chantype(sdata, sband, chan,
+ ht_cap, ht_oper, vht_oper,
+ &chandef, true);
/*
* Downgrade the new channel if we associated with restricted
@@ -3173,7 +3182,8 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
mutex_lock(&local->sta_mtx);
sta = sta_info_get(sdata, bssid);
- if (ieee80211_config_bw(sdata, sta, elems.ht_operation,
+ if (ieee80211_config_bw(sdata, sta,
+ elems.ht_cap_elem, elems.ht_operation,
elems.vht_operation, bssid, &changed)) {
mutex_unlock(&local->sta_mtx);
ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
@@ -3807,6 +3817,7 @@ static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
{
struct ieee80211_local *local = sdata->local;
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+ const struct ieee80211_ht_cap *ht_cap = NULL;
const struct ieee80211_ht_operation *ht_oper = NULL;
const struct ieee80211_vht_operation *vht_oper = NULL;
struct ieee80211_supported_band *sband;
@@ -3823,14 +3834,17 @@ static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
sband->ht_cap.ht_supported) {
- const u8 *ht_oper_ie, *ht_cap;
+ const u8 *ht_oper_ie, *ht_cap_ie;
ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
ht_oper = (void *)(ht_oper_ie + 2);
- ht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
- if (!ht_cap || ht_cap[1] < sizeof(struct ieee80211_ht_cap)) {
+ ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
+ if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
+ ht_cap = (void *)(ht_cap_ie + 2);
+
+ if (!ht_cap) {
ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
ht_oper = NULL;
}
@@ -3861,7 +3875,7 @@ static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
cbss->channel,
- ht_oper, vht_oper,
+ ht_cap, ht_oper, vht_oper,
&chandef, false);
sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
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