[BUG] brcmsmac: Invalid killswitch handling

[Sebastian Poehn <sebastian.poehn@googlemail.com>]

I had a discussion with Matthew Garrett about handling of a wifi
killswitch on a Dell laptop.

Some (rfkill) code was removed from platform/dell-laptop. On my machine
a bug now occurs which is caused by brcmsmac in the view of Matthew.

So is this a bug, or do you have no killsitch handling, so far?

Bug description:
> physical switch is OFF
> rfkill state is ON
> => Laptop hangs on boot (maybe because a physical ascent device is
> used by network subsystem)
> 
> physical switch is OFF
> rfkill state is OFF
> => Activate interface in Gnome Connection Manager => System hang
> 
> test setup:
> Dell Vostro 3300
> Broadcom 4313 Wifi
> Kernel 3.5.[0-2] & 3.6
> Fedora 17


What Matthew wrote to me:
> > With the old dell-laptop code included everything was fine with
> > brcmsmac. So either generic platform code does not handle the switch
> > correct or there is no handling at all?
> 
> brcmsmac is broken. I suspect it was happily claiming to be
> unblocked, 
> but was ignored because dell-laptop claimed to be blocked.

Full discussion thread:
https://lkml.org/lkml/2012/8/23/234