From: Bitterblue Smith <rtl8821cerfe2@gmail.com>
Date: Thu, 20 Nov 2025 14:12:35 +0000 (+0200)
Subject: wifi: rtl8xxxu: Fix the 40 MHz subchannel for RTL8192EU, RTL8723BU
X-Git-Tag: v6.19-rc1~170^2~33^2~10^2~2
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=fc44314a377ace14c76b7502cf0d785eb35e5cc4;p=thirdparty%2Fkernel%2Flinux.git

wifi: rtl8xxxu: Fix the 40 MHz subchannel for RTL8192EU, RTL8723BU

rtl8xxxu_gen2_config_channel() was missing the subchannel setting.
This function is used by RTL8192EU and RTL8723BU.

This change seems to make no difference in my testing on channel 13
with either chip.

Signed-off-by: Bitterblue Smith <rtl8821cerfe2@gmail.com>
Reviewed-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/a5de8d39-45c1-4667-ab4c-7109de6eb13d@gmail.com
---

diff --git a/drivers/net/wireless/realtek/rtl8xxxu/core.c b/drivers/net/wireless/realtek/rtl8xxxu/core.c
index 7700e4074dc39..739456640ca8b 100644
--- a/drivers/net/wireless/realtek/rtl8xxxu/core.c
+++ b/drivers/net/wireless/realtek/rtl8xxxu/core.c
@@ -1373,9 +1373,11 @@ void rtl8xxxu_gen2_config_channel(struct ieee80211_hw *hw)
 		    hw->conf.chandef.chan->center_freq) {
 			sec_ch_above = 1;
 			channel += 2;
+			subchannel = 2;
 		} else {
 			sec_ch_above = 0;
 			channel -= 2;
+			subchannel = 1;
 		}
 
 		val32 = rtl8xxxu_read32(priv, REG_FPGA0_RF_MODE);