[Buildroot] [PATCH] linux: enable UEVENT_HELPER when mdev is used

[Peter Korsgaard]

S10mdev uses /proc/sys/kernel/hotplug, which is only available if
CONFIG_UEVENT_HELPER is enabled in the kernel, so ensure it is.

Reported-by: Andy Shevchenko <andriy.shevchenko at linux.intel.com>
Signed-off-by: Peter Korsgaard <peter at korsgaard.com>
---
 linux/linux.mk | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/linux/linux.mk b/linux/linux.mk
index dd182d06b2..3a5eee63df 100644
--- a/linux/linux.mk
+++ b/linux/linux.mk
@@ -333,6 +333,8 @@ define LINUX_KCONFIG_FIXUP_CMDS
 		$(call KCONFIG_ENABLE_OPT,CONFIG_DEVTMPFS_MOUNT,$(@D)/.config))
 	$(if $(BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_EUDEV),
 		$(call KCONFIG_ENABLE_OPT,CONFIG_INOTIFY_USER,$(@D)/.config))
+	$(if $(BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_MDEV),
+		$(call KCONFIG_ENABLE_OPT,CONFIG_UEVENT_HELPER,$(@D)/.config))
 	$(if $(BR2_PACKAGE_AUDIT),
 		$(call KCONFIG_ENABLE_OPT,CONFIG_NET,$(@D)/.config)
 		$(call KCONFIG_ENABLE_OPT,CONFIG_AUDIT,$(@D)/.config))
-- 
2.11.0