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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: 197f466e93 ("ath9k_htc: Do not select MAC80211_LEDS by default")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20210125113654.2408057-1-arnd@kernel.org
This commit is contained in:
Arnd Bergmann 2021-01-25 12:36:42 +01:00 committed by Kalle Valo
parent 0acb20a543
commit b64acb28da
2 changed files with 3 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/net/wireless/ath/ath9k/Kconfig
View File

@ -21,11 +21,9 @@ config ATH9K_BTCOEX_SUPPORT
config ATH9K
tristate "Atheros 802.11n wireless cards support"
depends on MAC80211 && HAS_DMA
select MAC80211_LEDS if LEDS_CLASS=y || LEDS_CLASS=MAC80211
select ATH9K_HW
select ATH9K_COMMON
imply NEW_LEDS
imply LEDS_CLASS
imply MAC80211_LEDS
help
This module adds support for wireless adapters based on
Atheros IEEE 802.11n AR5008, AR9001 and AR9002 family
@ -176,11 +174,9 @@ config ATH9K_PCI_NO_EEPROM
config ATH9K_HTC
tristate "Atheros HTC based wireless cards support"
depends on USB && MAC80211
select MAC80211_LEDS if LEDS_CLASS=y || LEDS_CLASS=MAC80211
select ATH9K_HW
select ATH9K_COMMON
imply NEW_LEDS
imply LEDS_CLASS
imply MAC80211_LEDS
help
Support for Atheros HTC based cards.
Chipsets supported: AR9271

2
net/mac80211/Kconfig
View File

@ -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
select LEDS_TRIGGERS
help
This option enables a few LED triggers for different