mac80211: only alloc mem if a station doesn't exist yet

This speeds up the function in case a station already exists by avoiding
calling an expensive kzalloc just to free it again after the next check.

Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
1 file changed