Re: [PATCH rtw-next v2] wifi: rtl8xxxu: Detect the maximum supported channel width

[Thorsten Leemhuis <linux@leemhuis.info>]

On 5/6/26 09:57, Ping-Ke Shih wrote:
> Bitterblue Smith <rtl8821cerfe2@gmail.com> wrote:
> 
>> Some devices malfunction when connected to a network with 40 MHz channel
>> width, because they don't support that.
>>
>> RTL8188FU, RTL8192FU, and RTL8710BU (RTL8188GU) have a way to signal
>> this (and some other capabilities) to the driver. Get this information
>> from the hardware and advertise 40 MHz support only when the hardware
>> can handle it. We assume the other chips can always handle it.
>>
>> RTL8710BU needs a different way to retrieve this information, which will
>> be implemented some other time.
>>
>> Fixes: dbf9b7bb0edf ("wifi: rtl8xxxu: Enable 40 MHz width by default")
>> Cc: stable@vger.kernel.org
>> Closes: https://bugzilla.kernel.org/show_bug.cgi?id=221394
>> Signed-off-by: Bitterblue Smith <rtl8821cerfe2@gmail.com>
>> Reviewed-by: Ping-Ke Shih <pkshih@realtek.com>

Thx for fixing this!

> 1 patch(es) applied to rtw-next branch of rtw.git, thanks.
> ef771eabc79d wifi: rtl8xxxu: Detect the maximum supported channel width
> https://github.com/pkshih/rtw.git

rtw-next sounds like it aims for the next merge window; and it seems the
fix hasn't even hit -next yet. This is slightly unfortunate, as this
afaics is a fix for a recent regression -- so it ideally should head
towards mainline by now[1], as Linus' the rule of thumb is to "generally
fix regressions "within a week", preferably before the next rc"[1].

Or am I missing something? That might very well be the case, so do not
hesitate to tell me!

Ciao, Thorsten

[1]
https://www.kernel.org/doc/html/latest/process/handling-regressions.html#on-how-quickly-regressions-should-be-fixed