From f04d2c247e0407ff8219395bef11ddc0837b7397 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Thu, 11 Jan 2024 18:17:43 +0200 Subject: wifi: mac80211: disallow drivers with HT wider than HE To simplify the code in the next patch, disallow drivers supporting 40 MHz in HT but not HE, since we'd otherwise have to track local maximum bandwidth per mode there. Signed-off-by: Johannes Berg Reviewed-by: Gregory Greenman Signed-off-by: Miri Korenblit Link: https://msgid.link/20240111181514.da15fe3214d2.I4df51ad2f4c844615c168bf9bdb498925b3c77d4@changeid Signed-off-by: Johannes Berg --- net/mac80211/main.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) (limited to 'net/mac80211') diff --git a/net/mac80211/main.c b/net/mac80211/main.c index d48fa1147c14..e05bcc35bc1e 100644 --- a/net/mac80211/main.c +++ b/net/mac80211/main.c @@ -1119,8 +1119,26 @@ int ieee80211_register_hw(struct ieee80211_hw *hw) supp_vht = supp_vht || sband->vht_cap.vht_supported; for_each_sband_iftype_data(sband, i, iftd) { + u8 he_40_mhz_cap; + supp_he = supp_he || iftd->he_cap.has_he; supp_eht = supp_eht || iftd->eht_cap.has_eht; + + if (sband->band == NL80211_BAND_2GHZ) + he_40_mhz_cap = + IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G; + else + he_40_mhz_cap = + IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G; + + /* currently no support for HE client where HT has 40 MHz but not HT */ + if (iftd->he_cap.has_he && + iftd->types_mask & (BIT(NL80211_IFTYPE_STATION) | + BIT(NL80211_IFTYPE_P2P_CLIENT)) && + sband->ht_cap.ht_supported && + sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && + !(iftd->he_cap.he_cap_elem.phy_cap_info[0] & he_40_mhz_cap)) + return -EINVAL; } /* HT, VHT, HE require QoS, thus >= 4 queues */ -- cgit