From 15e230abaaa5a79feb25d1ef29b380e8b63aea0c Mon Sep 17 00:00:00 2001
From: Fred Zhou <fred.zy@gmail.com>
Date: Tue, 24 Sep 2013 10:33:01 +0800
Subject: [PATCH] mac80211: use exact-size allocation for authentication frame

The authentication frame has a fixied size of 30 bytes
(including header, algo num, trans seq num, and status)
followed by a variable challenge text.
Allocate using exact size, instead of over-allocation
by sizeof(ieee80211_mgmt).

Signed-off-by: Fred Zhou <fred.zy@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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