Hi,
Any suggestion about this patch?
Thanks,
Liwei.
On 6/24/21 19:06, Liwei Song wrote:
>
>
> On 6/24/21 18:41, Kalle Valo wrote:
>> Liwei Song <liwei.song@xxxxxxxxxxxxx> writes:
>>
>>> MAC80211_LEDS depends on LEDS_CLASS=y or LEDS_CLASS=MAC80211,
>>> add condition to enable it in iwlwifi/Kconfig to avoid below
>>> compile warning when LEDS_CLASS was set to m:
>>>
>>> WARNING: unmet direct dependencies detected for MAC80211_LEDS
>>> Depends on [n]: NET [=y] && WIRELESS [=y] && MAC80211 [=y] && (LEDS_CLASS [=m]=y || LEDS_CLASS [=m]=MAC80211 [=y])
>>> Selected by [m]:
>>> - IWLWIFI_LEDS [=y] && NETDEVICES [=y] && WLAN [=y] && WLAN_VENDOR_INTEL [=y] && IWLWIFI [=m] && (LEDS_CLASS [=m]=y || LEDS_CLASS [=m]=IWLWIFI [=m]) && (IWLMVM [=m] || IWLDVM [=m])
>>>
>>> Signed-off-by: Liwei Song <liwei.song@xxxxxxxxxxxxx>
>>
>> Is this is a new regression or an old bug? What commit caused this?
>
> It should be exist when the below commit change the dependency of MAC80211_LEDS
> to fix some build error:
>
> commit b64acb28da8394485f0762e657470c9fc33aca4d
> Author: Arnd Bergmann <arnd@xxxxxxxx>
> Date: Mon Jan 25 12:36:42 2021 +0100
>
> ath9k: fix build error with LEDS_CLASS=m
>
> When CONFIG_ATH9K is built-in but LED support is in a loadable
> module, both ath9k drivers fails to link:
>
> x86_64-linux-ld: drivers/net/wireless/ath/ath9k/gpio.o: in function `ath_deinit_leds':
> gpio.c:(.text+0x36): undefined reference to `led_classdev_unregister'
> x86_64-linux-ld: drivers/net/wireless/ath/ath9k/gpio.o: in function `ath_init_leds':
> gpio.c:(.text+0x179): undefined reference to `led_classdev_register_ext'
>
> The problem is that the 'imply' keyword does not enforce any dependency
> but is only a weak hint to Kconfig to enable another symbol from a
> defconfig file.
>
> Change imply to a 'depends on LEDS_CLASS' that prevents the incorrect
> configuration but still allows building the driver without LED support.
>
> The 'select MAC80211_LEDS' is now ensures that the LED support is
> actually used if it is present, and the added Kconfig dependency
> on MAC80211_LEDS ensures that it cannot be enabled manually when it
> has no effect.
>
> Fixes: 197f466e93f5 ("ath9k_htc: Do not select MAC80211_LEDS by default")
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
> Acked-by: Johannes Berg <johannes@xxxxxxxxxxxxxxxx>
> Signed-off-by: Kalle Valo <kvalo@xxxxxxxxxxxxxx>
> Link: https://lore.kernel.org/r/20210125113654.2408057-1-arnd@xxxxxxxxxx
>
> diff --git a/net/mac80211/Kconfig b/net/mac80211/Kconfig
> index cd9a9bd242ba..51ec8256b7fa 100644
> --- a/net/mac80211/Kconfig
> +++ b/net/mac80211/Kconfig
> @@ -69,7 +69,7 @@ config MAC80211_MESH
> config MAC80211_LEDS
> bool "Enable LED triggers"
> depends on MAC80211
> - depends on LEDS_CLASS
> + depends on LEDS_CLASS=y || LEDS_CLASS=MAC80211
>
>
> Thanks,
> Liwei.
>
>
>>
