[Buildroot] [PATCH 2/3] hostapd: make ACS dependent on nl80211

Alexander Mukhin alexander.i.mukhin at gmail.com
Sat Dec 30 15:57:35 UTC 2017


According to hostapd's defconfig file, ACS is currently only supported
through the nl80211 driver. Search through the source code also confirms
that ACS machinery is present in the nl80211 driver only.

Although hostapd can be built with ACS enabled and nl80211 disabled, an
attempt to use ACS with other drivers by setting a wireless channel to 0
results in a runtime failure (driver doesn't accept this value). So we
might save a user from selecting a meaningless combination by making ACS
dependent on nl80211.

Signed-off-by: Alexander Mukhin <alexander.i.mukhin at gmail.com>
---
 package/hostapd/Config.in | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/package/hostapd/Config.in b/package/hostapd/Config.in
index f6182a9268..d23e5e1dca 100644
--- a/package/hostapd/Config.in
+++ b/package/hostapd/Config.in
@@ -53,6 +53,7 @@ config BR2_PACKAGE_HOSTAPD_HAS_WIFI_DRIVERS
 config BR2_PACKAGE_HOSTAPD_ACS
 	bool "Enable ACS"
 	default y
+	depends on BR2_PACKAGE_HOSTAPD_DRIVER_NL80211
 	help
 	  Enable support for standard ACS (Automatic Channel Selection).
 	  Some propietary drivers use a custom algorithm which requires
@@ -60,6 +61,9 @@ config BR2_PACKAGE_HOSTAPD_ACS
 	  causing hostapd to use the standard one which doesn't work
 	  for those cases.
 
+comment "ACS is currently only supported through the nl80211 driver"
+	depends on !BR2_PACKAGE_HOSTAPD_DRIVER_NL80211
+
 config BR2_PACKAGE_HOSTAPD_EAP
 	bool "Enable EAP"
 	depends on !BR2_STATIC_LIBS
-- 
2.11.0



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