From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-ea0-f182.google.com ([209.85.215.182]:52135 "EHLO mail-ea0-f182.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756648Ab3KHKlp (ORCPT ); Fri, 8 Nov 2013 05:41:45 -0500 Received: by mail-ea0-f182.google.com with SMTP id o10so968306eaj.41 for ; Fri, 08 Nov 2013 02:41:43 -0800 (PST) From: Janusz Dziedzic To: linux-wireless@vger.kernel.org Cc: johannes@sipsolutions.net, mcgrof@do-not-panic.com, Janusz Dziedzic Subject: [PATCH 1/3] cfg80211: DFS check dfs_region before CAC Date: Fri, 8 Nov 2013 11:41:25 +0100 Message-Id: <1383907287-2925-1-git-send-email-janusz.dziedzic@tieto.com> (sfid-20131108_114149_556053_78DBF64A) Sender: linux-wireless-owner@vger.kernel.org List-ID: Before we will start radar detection check if we have correct DFS region. Fail in case we don't know DFS region (don't know CAC/NOP timing and how to configure DFS pattern detector). Signed-off-by: Janusz Dziedzic --- net/wireless/nl80211.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 076ed55..635842b 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -5628,8 +5628,21 @@ static int nl80211_start_radar_detection(struct sk_buff *skb, struct net_device *dev = info->user_ptr[1]; struct wireless_dev *wdev = dev->ieee80211_ptr; struct cfg80211_chan_def chandef; + const struct ieee80211_regdomain *regdom; + u8 dfs_region; int err; + if (!cfg80211_regdomain) + return -EINVAL; + + rcu_read_lock(); + regdom = rcu_dereference(cfg80211_regdomain); + dfs_region = regdom->dfs_region; + rcu_read_unlock(); + + if (dfs_region == NL80211_DFS_UNSET) + return -EINVAL; + err = nl80211_parse_chandef(rdev, info, &chandef); if (err) return err; -- 1.7.9.5