Hi,

Having problem with this error when trying to setup hotplug for request_firmware() with busybox 1.9.1 and linux 2.6.22.1 built under Buildroot.

When I issue:
echo /sbin/mdev >/proc/kernel/hotplug
I get
-sh: cannot create /proc/sys/kernel/hotplug: nonexistent directory.

Sure enough the directory isn't there. I think I have all the .config options set, ie:
CONFIG_EMBEDDED=y
CONFIG_HOTPLUG=y

My driver code compiles okay that uses request_firmware() call, but why isn't the /hotplug directory there, I must be missing some option, or has it been phased out, if so how do I get my firmware image into the driver without some horrible ioctl from userland ?

Any help will be fantastic, this is my first post too !

********** SOLVED

Also needed CONFIG_NET to compile basic netlink support which does kernel to user event messaging.