linux-kernel - Re: [PATCH] wireless: carl9170: fix LEDS build errors & warnings

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Date:   Sat, 29 May 2021 09:42:23 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        kernel test robot <lkp@...el.com>,
        Kalle Valo <kvalo@...eaurora.org>,
        Christian Lamparter <chunkeey@...glemail.com>,
        linux-wireless <linux-wireless@...r.kernel.org>
Subject: Re: [PATCH] wireless: carl9170: fix LEDS build errors & warnings

On 5/29/21 5:10 AM, Arnd Bergmann wrote:
> On Sat, May 29, 2021 at 9:16 AM Randy Dunlap <rdunlap@...radead.org> wrote:
>>
>> kernel test robot reports over 200 build errors and warnings
>> that are due to this Kconfig problem when CARL9170=m,
>> MAC80211=y, and LEDS_CLASS=m.
> 
> I think this avoids the build problems, but it's not really logical:
> 
>> --- linux-next-20210528.orig/drivers/net/wireless/ath/carl9170/Kconfig
>> +++ linux-next-20210528/drivers/net/wireless/ath/carl9170/Kconfig
>> @@ -17,9 +17,7 @@ config CARL9170
>>  config CARL9170_LEDS
>>         bool "SoftLED Support"
>>         depends on CARL9170
>> -       select MAC80211_LEDS
>> -       select LEDS_CLASS
>> -       select NEW_LEDS
>> +       select MAC80211_LEDS if LEDS_CLASS=y || LEDS_CLASS=MAC80211
>>         default y
>>         help
>>           This option is necessary, if you want your device' LEDs to blink
> 
> The point of the option is to enable LED support, but now it doesn't do that
> when LEDS_CLASS is a loadable module and MAC80211 is built-in.
> 
> I think a more sensible solution would be to follow the example of
> 
> config MT76_LEDS
>         bool
>         depends on MT76_CORE
>         depends on LEDS_CLASS=y || MT76_CORE=LEDS_CLASS
>         default y

Looks good. I'll send a v2.

thanks.

-- 
~Randy