hostapd: fix 6 GHz center frequency adjustment condition

Ensure that the center frequency segment 0 index adjustment for
320 MHz bandwidth is applied only for valid 6 GHz frequencies.

Previously, the bandwidth check alone could trigger the adjustment
even when the operating center index did not correspond to a 6 GHz
frequency. Add an explicit is_6ghz_freq() check to avoid incorrect
center frequency offset calculations.

Fixes: WIFI-15238

Signed-off-by: Venkat Chimata <venkat@nearhop.com>

feeds/qca-wifi-7/hostapd/patches/zzz-t02-hostapd-fix-6-GHz-center-frequency-adjustment-condit.patch

@@ -0,0 +1,34 @@
+From 406807b134f88ec038ee120a0a0085e140e96313 Mon Sep 17 00:00:00 2001
+From: Venkat Chimata <venkat@nearhop.com>
+Date: Fri, 23 Jan 2026 00:31:13 +0530
+Subject: [PATCH] hostapd: fix 6 GHz center frequency adjustment condition
+
+Ensure that the center frequency segment 0 index adjustment for
+320 MHz bandwidth is applied only for valid 6 GHz frequencies.
+
+Previously, the bandwidth check alone could trigger the adjustment
+even when the operating center index did not correspond to a 6 GHz
+frequency. Add an explicit is_6ghz_freq() check to avoid incorrect
+center frequency offset calculations.
+
+Signed-off-by: Venkat Chimata <venkat@nearhop.com>
+---
+ src/ap/ap_config.h | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/ap/ap_config.h b/src/ap/ap_config.h
+index dfd895e..b6c2a4a 100644
+--- a/src/ap/ap_config.h
++++ b/src/ap/ap_config.h
+@@ -1306,7 +1306,7 @@ hostapd_set_oper_centr_freq_seg0_idx(struct hostapd_config *conf,
+ #ifdef CONFIG_IEEE80211BE
+ 	if (conf->ieee80211be)
+ 		conf->eht_oper_centr_freq_seg0_idx = oper_centr_freq_seg0_idx;
+-	if (center_idx_to_bw_6ghz(oper_centr_freq_seg0_idx) == 4)
++	if (is_6ghz_freq(conf->channel) && (center_idx_to_bw_6ghz(oper_centr_freq_seg0_idx) == 4))
+ 		oper_centr_freq_seg0_idx +=
+ 			conf->channel > oper_centr_freq_seg0_idx ? 16 : -16;
+ 
+-- 
+2.34.1
+