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nl80211: allow CAC only if no operation is going on 

A CAC should fail if it is triggered while the interface is already
running.

Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
Signed-off-by: Mathias Kretschmer <mathias.kretschmer@fokus.fraunhofer.de>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Simon Wunderlich 2013-09-03 19:43:18 +02:00 committed by Johannes Berg
parent 1f4ffde845
commit ff311bc11a
1 changed files with 3 additions and 0 deletions
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3
net/wireless/nl80211.c
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@ -5591,6 +5591,9 @@ static int nl80211_start_radar_detection(struct sk_buff *skb,
if (err)
return err;
if (netif_carrier_ok(dev))
return -EBUSY;
if (wdev->cac_started)
return -EBUSY;