mt76: fix building without CONFIG_LEDS_CLASS

[ Upstream commit b374e8686fc35ae124e62dc78725ea656ba1ef8a ]

When CONFIG_LEDS_CLASS is disabled, or it is a loadable module while
mt76 is built-in, we run into a link error:

drivers/net/wireless/mediatek/mt76/mac80211.o: In function `mt76_register_device':
mac80211.c:(.text+0xb78): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `devm_of_led_classdev_register'

We don't really need a hard dependency here as the driver can presumably
work just fine without LEDs, so this follows the iwlwifi example and
adds a separate Kconfig option for the LED support, this will be available
whenever it will link, and otherwise the respective code gets left out from
the driver object.

Fixes: 17f1de56df05 ("mt76: add common code shared between multiple chipsets")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/wireless/mediatek/mt76/Kconfig b/drivers/net/wireless/mediatek/mt76/Kconfig
index b6c5f17..2782621 100644 (file)
--- a/drivers/net/wireless/mediatek/mt76/Kconfig
+++ b/drivers/net/wireless/mediatek/mt76/Kconfig
@@ -1,6 +1,12 @@
 config MT76_CORE
        tristate
 
+config MT76_LEDS
+       bool
+       depends on MT76_CORE
+       depends on LEDS_CLASS=y || MT76_CORE=LEDS_CLASS
+       default y
+
 config MT76_USB
        tristate
        depends on MT76_CORE

diff --git a/drivers/net/wireless/mediatek/mt76/mac80211.c b/drivers/net/wireless/mediatek/mt76/mac80211.c
index 029d54b..ade4a20 100644 (file)
--- a/drivers/net/wireless/mediatek/mt76/mac80211.c
+++ b/drivers/net/wireless/mediatek/mt76/mac80211.c
@@ -342,9 +342,11 @@ int mt76_register_device(struct mt76_dev *dev, bool vht,
        mt76_check_sband(dev, NL80211_BAND_2GHZ);
        mt76_check_sband(dev, NL80211_BAND_5GHZ);
 
-       ret = mt76_led_init(dev);
-       if (ret)
-               return ret;
+       if (IS_ENABLED(CONFIG_MT76_LEDS)) {
+               ret = mt76_led_init(dev);
+               if (ret)
+                       return ret;
+       }
 
        return ieee80211_register_hw(hw);
 }

diff --git a/drivers/net/wireless/mediatek/mt76/mt76x2_init.c b/drivers/net/wireless/mediatek/mt76/mt76x2_init.c
index b814391..03b103c 100644 (file)
--- a/drivers/net/wireless/mediatek/mt76/mt76x2_init.c
+++ b/drivers/net/wireless/mediatek/mt76/mt76x2_init.c
@@ -581,8 +581,10 @@ int mt76x2_register_device(struct mt76x2_dev *dev)
        mt76x2_dfs_init_detector(dev);
 
        /* init led callbacks */
-       dev->mt76.led_cdev.brightness_set = mt76x2_led_set_brightness;
-       dev->mt76.led_cdev.blink_set = mt76x2_led_set_blink;
+       if (IS_ENABLED(CONFIG_MT76_LEDS)) {
+               dev->mt76.led_cdev.brightness_set = mt76x2_led_set_brightness;
+               dev->mt76.led_cdev.blink_set = mt76x2_led_set_blink;
+       }
 
        ret = mt76_register_device(&dev->mt76, true, mt76x2_rates,
                                   ARRAY_SIZE(mt76x2_rates));