From: Ping-Ke Shih <pkshih@realtek.com>
To: Bitterblue Smith <rtl8821cerfe2@gmail.com>,
"linux-wireless@vger.kernel.org" <linux-wireless@vger.kernel.org>
Cc: Jes Sorensen <Jes.Sorensen@gmail.com>
Subject: RE: [PATCH rtw-next 5/5] wifi: rtl8xxxu: Enable 40 MHz width by default
Date: Tue, 18 Nov 2025 03:01:30 +0000 [thread overview]
Message-ID: <bb7c1eb515c14d78b0089f4fab7f5fda@realtek.com> (raw)
In-Reply-To: <5000a39b-0d0b-4625-aafb-be6fc668d6cd@gmail.com>
Bitterblue Smith <rtl8821cerfe2@gmail.com> wrote:
> 40 MHz support is hidden behind the ht40_2g module parameter with
> this comment:
>
> /*
> * Some APs will negotiate HT20_40 in a noisy environment leading
> * to miserable performance. Rather than defaulting to this, only
> * enable it if explicitly requested at module load time.
> */
>
> This parameter was added in commit 26f1fad29ad9 ("New driver:
> rtl8xxxu (mac80211)"). Back then rtl8xxxu only supported RTL8723AU
> and the RTL8192CU family. It's entirely possible the miserable
> performance was due to mistakes in the channel switching function,
> which were fixed in a previous patch.
>
> Delete the ht40_2g module parameter. If someone still needs to
> disable 40 MHz support, cfg80211 has the module parameter
> cfg80211_disable_40mhz_24ghz. That works too.
>
> Signed-off-by: Bitterblue Smith <rtl8821cerfe2@gmail.com>
Reviewed-by: Ping-Ke Shih <pkshih@realtek.com>
prev parent reply other threads:[~2025-11-18 3:01 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-16 20:25 [PATCH rtw-next 0/5] wifi: rtl8xxxu: 40 MHz fixes Bitterblue Smith
2025-11-16 20:27 ` [PATCH rtw-next 1/5] wifi: rtl8xxxu: Fix HT40 channel config for RTL8192CU, RTL8723AU Bitterblue Smith
2025-11-18 2:44 ` Ping-Ke Shih
2025-11-16 20:28 ` [PATCH rtw-next 2/5] wifi: rtl8xxxu: Make RTL8192CU, RTL8723AU TX with 40 MHz width Bitterblue Smith
2025-11-18 2:46 ` Ping-Ke Shih
2025-11-16 20:29 ` [PATCH rtw-next 3/5] wifi: rtl8xxxu: Fix the 40 MHz subchannel for RTL8192EU, RTL8723BU Bitterblue Smith
2025-11-18 2:55 ` Ping-Ke Shih
2025-11-16 20:30 ` [PATCH rtw-next 4/5] wifi: rtl8xxxu: Fix RX channel width reported by RTL8192FU Bitterblue Smith
2025-11-18 2:59 ` Ping-Ke Shih
2025-11-18 3:02 ` Ping-Ke Shih
2025-11-18 17:33 ` Bitterblue Smith
2025-11-19 0:28 ` Ping-Ke Shih
2025-11-16 20:31 ` [PATCH rtw-next 5/5] wifi: rtl8xxxu: Enable 40 MHz width by default Bitterblue Smith
2025-11-18 3:01 ` Ping-Ke Shih [this message]
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