linux-kernel - Re: [PATCH] ath9k: Add separate entry for LED triggers to fix module builds

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Message-Id: <20210128073321.35C1BC433ED@smtp.codeaurora.org>
Date:   Thu, 28 Jan 2021 07:33:21 +0000 (UTC)
From:   Kalle Valo <kvalo@...eaurora.org>
To:     Krzysztof Kozlowski <krzk@...nel.org>
Cc:     QCA ath9k Development <ath9k-devel@....qualcomm.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Krzysztof Kozlowski <krzk@...nel.org>,
        kernel test robot <lkp@...el.com>
Subject: Re: [PATCH] ath9k: Add separate entry for LED triggers to fix module
 builds

Krzysztof Kozlowski <krzk@...nel.org> wrote:

> After commit 72cdab808714 ("ath9k: Do not select MAC80211_LEDS by
> default") a configuration like:
>  - MAC80211_LEDS=y
>  - LEDS_CLASS=m
>  - NEW_LEDS=y
>  - ATH9K=y
> leads to a build failure:
> 
>     /usr/bin/ld: drivers/net/wireless/ath/ath9k/gpio.o: in function `ath_deinit_leds':
>     drivers/net/wireless/ath/ath9k/gpio.c:69: undefined reference to `led_classdev_unregister'
>     /usr/bin/ld: drivers/net/wireless/ath/ath9k/gpio.o: in function `led_classdev_register':
>     include/linux/leds.h:190: undefined reference to `led_classdev_register_ext'
> 
> To be able to use LED triggers, the LEDS_CLASS can only be a module
> if ath9k driver is a module as well.
> 
> Reported-by: kernel test robot <lkp@...el.com>
> Fixes: 72cdab808714 ("ath9k: Do not select MAC80211_LEDS by default")
> Signed-off-by: Krzysztof Kozlowski <krzk@...nel.org>

I took Arnd's patch instead:

https://patchwork.kernel.org/project/linux-wireless/patch/20210125113654.2408057-1-arnd@kernel.org/

But I think we really need the cleanup Arnd proposes during the discussion so
that we have consistent LED handling in wireless drivers. Patches very welcome.

Patch set to Superseded.

-- 
https://patchwork.kernel.org/project/linux-wireless/patch/20201227143034.1134829-1-krzk@kernel.org/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches