When an AP is configured for HT operation on 40MHz but has overlapping BSS on
the secondary channel, it will fallback to 20MHz only. Also a 40MHz AP will
downgrade to 20MHz while at least 1 40MHz intolerant STA is connected.
However in the current code, on such an AP, we do not check the obss_interval
parameter on the last 40MHz intolerant STA disconnect & start a timer that will
unconditionnaly bring the AP to 40MHz operation even if it had overlapping BSS.
Signed-off-by: Nicolas Escande <nico.escande@xxxxxxxxx>
---
src/ap/ieee802_11_ht.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/src/ap/ieee802_11_ht.c b/src/ap/ieee802_11_ht.c
index f90f1254e..af3ff9110 100644
--- a/src/ap/ieee802_11_ht.c
+++ b/src/ap/ieee802_11_ht.c
@@ -417,6 +417,7 @@ void ht40_intolerant_remove(struct hostapd_iface *iface, struct sta_info *sta)
iface->num_sta_ht40_intolerant--;
if (iface->num_sta_ht40_intolerant == 0 &&
+ iface->conf->obss_interval &&
(iface->conf->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET) &&
(iface->drv_flags & WPA_DRIVER_FLAGS_HT_2040_COEX)) {
unsigned int delay_time = OVERLAPPING_BSS_TRANS_DELAY_FACTOR *
--
2.44.0
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