diff mbox series

[1/3] iwlwifi: fix LED dependencies

Message ID 20211204173848.873293-1-arnd@kernel.org
State New
Headers show
Series [1/3] iwlwifi: fix LED dependencies | expand

Commit Message

Arnd Bergmann Dec. 4, 2021, 5:38 p.m. UTC 
From: Arnd Bergmann <arnd@arndb.de>

The dependencies for LED configuration are highly inconsistent and too
complicated at the moment. One of the results is a randconfig failure I
get very rarely when LEDS_CLASS is in a loadable module, but the wireless
core is built-in:

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]:
  - IWLEGACY [=m] && NETDEVICES [=y] && WLAN [=y] && WLAN_VENDOR_INTEL [=y]
  - 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])

aarch64-linux-ld: drivers/net/wireless/ath/ath5k/led.o: in function `ath5k_register_led':
led.c:(.text+0x60): undefined reference to `led_classdev_register_ext'
aarch64-linux-ld: drivers/net/wireless/ath/ath5k/led.o: in function `ath5k_unregister_leds':
led.c:(.text+0x200): undefined reference to `led_classdev_unregister'

For iwlwifi, the dependency is wrong, since this config prevents the
MAC80211_LEDS code from being part of a built-in MAC80211 driver.

For iwlegacy, this is worse because the driver tries to force-enable
the other subsystems, which is both a layering violation and a bug
because it will still fail with MAC80211=y and IWLEGACY=m, leading
to LEDS_CLASS being a module as well.

The actual link failure in the ath5k driver is a result of MAC80211_LEDS
being enabled but not usable. With the Kconfig logic fixed in the
Intel drivers, the ath5k driver works as expected again.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/net/wireless/intel/iwlegacy/Kconfig | 4 ++--
 drivers/net/wireless/intel/iwlwifi/Kconfig  | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

Comments

Kalle Valo Dec. 8, 2021, 6:17 p.m. UTC | #1 
Arnd Bergmann <arnd@kernel.org> wrote:

> From: Arnd Bergmann <arnd@arndb.de>
> 
> The dependencies for LED configuration are highly inconsistent and too
> complicated at the moment. One of the results is a randconfig failure I
> get very rarely when LEDS_CLASS is in a loadable module, but the wireless
> core is built-in:
> 
> 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]:
>   - IWLEGACY [=m] && NETDEVICES [=y] && WLAN [=y] && WLAN_VENDOR_INTEL [=y]
>   - 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])
> 
> aarch64-linux-ld: drivers/net/wireless/ath/ath5k/led.o: in function `ath5k_register_led':
> led.c:(.text+0x60): undefined reference to `led_classdev_register_ext'
> aarch64-linux-ld: drivers/net/wireless/ath/ath5k/led.o: in function `ath5k_unregister_leds':
> led.c:(.text+0x200): undefined reference to `led_classdev_unregister'
> 
> For iwlwifi, the dependency is wrong, since this config prevents the
> MAC80211_LEDS code from being part of a built-in MAC80211 driver.
> 
> For iwlegacy, this is worse because the driver tries to force-enable
> the other subsystems, which is both a layering violation and a bug
> because it will still fail with MAC80211=y and IWLEGACY=m, leading
> to LEDS_CLASS being a module as well.
> 
> The actual link failure in the ath5k driver is a result of MAC80211_LEDS
> being enabled but not usable. With the Kconfig logic fixed in the
> Intel drivers, the ath5k driver works as expected again.
> 
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> Acked-by: Luca Coelho <luciano.coelho@intel.com>

3 patches applied to wireless-drivers.git, thanks.

efdbfa0ad03e iwlwifi: fix LED dependencies
c68115fc5375 brcmsmac: rework LED dependencies
f7d55d2e439f mt76: mt7921: fix build regression
diff mbox series

Patch

diff --git a/drivers/net/wireless/intel/iwlegacy/Kconfig b/drivers/net/wireless/intel/iwlegacy/Kconfig
index 24fe3f63c321..7eacc8e58ee1 100644
--- a/drivers/net/wireless/intel/iwlegacy/Kconfig
+++ b/drivers/net/wireless/intel/iwlegacy/Kconfig
@@ -2,14 +2,13 @@ 
 config IWLEGACY
 	tristate
 	select FW_LOADER
-	select NEW_LEDS
-	select LEDS_CLASS
 	select LEDS_TRIGGERS
 	select MAC80211_LEDS
 
 config IWL4965
 	tristate "Intel Wireless WiFi 4965AGN (iwl4965)"
 	depends on PCI && MAC80211
+	depends on LEDS_CLASS=y || LEDS_CLASS=MAC80211
 	select IWLEGACY
 	help
 	  This option enables support for
@@ -38,6 +37,7 @@  config IWL4965
 config IWL3945
 	tristate "Intel PRO/Wireless 3945ABG/BG Network Connection (iwl3945)"
 	depends on PCI && MAC80211
+	depends on LEDS_CLASS=y || LEDS_CLASS=MAC80211
 	select IWLEGACY
 	help
 	  Select to build the driver supporting the:
diff --git a/drivers/net/wireless/intel/iwlwifi/Kconfig b/drivers/net/wireless/intel/iwlwifi/Kconfig
index 337428ef2e67..cf1125d84929 100644
--- a/drivers/net/wireless/intel/iwlwifi/Kconfig
+++ b/drivers/net/wireless/intel/iwlwifi/Kconfig
@@ -47,7 +47,7 @@  if IWLWIFI
 
 config IWLWIFI_LEDS
 	bool
-	depends on LEDS_CLASS=y || LEDS_CLASS=IWLWIFI
+	depends on LEDS_CLASS=y || LEDS_CLASS=MAC80211
 	depends on IWLMVM || IWLDVM
 	select LEDS_TRIGGERS
 	select MAC80211_LEDS