From 1ff79dfa37d36c16d91eeeebb8cc3dcba32c2c16 Mon Sep 17 00:00:00 2001
From: Johannes Berg <johannes.berg@intel.com>
Date: Wed, 22 Jan 2014 10:05:27 +0100
Subject: [PATCH] nl80211: check channel switch validity better

Before allowing userspace to initiate a channel switch, check
that it's actually connected in some sense. Also use a more
appropriate error code for the not connected case.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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