[PATCH v2] AP: Allow downgrading to 20MHz based on OBSS results
Aloka Dixit <[email protected]>
| Newsgroups | gmane.linux.drivers.hostap |
|---|---|
| Message-ID | <[email protected]> |
Before operating on 40MHz in 2.4GHz, AP looks for overlapping BSS in neighboring channels. Upon OBSS detection, AP should downgrade to 20MHz bandwidth. This decistion is broken now for HE40. As of now ieee80211n_check_scan skips the rollback step for 20MHz as allowed_ht40_channel_pair returns true when primary and secondary channels are same. Fix that. Signed-off-by: Aloka Dixit <[email protected]> --- src/ap/hw_features.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/src/ap/hw_features.c b/src/ap/hw_features.c index 83aecade3bc3..142c4e442f4e 100644 --- a/src/ap/hw_features.c +++ b/src/ap/hw_features.c @@ -314,7 +314,7 @@ static void ieee80211n_check_scan(struct hostapd_iface *iface) { struct wpa_scan_results *scan_res; int oper40; - int res; + int res = 0; /* Check list of neighboring BSSes (from scan) to see whether 40 MHz is * allowed per IEEE Std 802.11-2012, 10.15.3.2 */ @@ -350,7 +350,9 @@ static void ieee80211n_check_scan(struct hostapd_iface *iface) } } - res = ieee80211n_allowed_ht40_channel_pair(iface); + if (iface->conf->secondary_channel) + res = ieee80211n_allowed_ht40_channel_pair(iface); + if (!res) { iface->conf->secondary_channel = 0; hostapd_set_oper_centr_freq_seg0_idx(iface->conf, 0); -- 2.7.4