Return-path: Received: from mx0b-0016f401.pphosted.com ([67.231.156.173]:40870 "EHLO mx0b-0016f401.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751623AbaLXMss (ORCPT ); Wed, 24 Dec 2014 07:48:48 -0500 From: Avinash Patil To: CC: , , , , Avinash Patil Subject: [PATCH] cfg80211: check for carrier state only when offchanel CAC supported Date: Wed, 24 Dec 2014 04:47:16 -0800 Message-ID: <1419425236-17457-1-git-send-email-patila@marvell.com> (sfid-20141224_134852_404522_C20DD87A) MIME-Version: 1.0 Content-Type: text/plain Sender: linux-wireless-owner@vger.kernel.org List-ID: Checking for carrier state during start_radar_detection is needed only for devices which support offchannel CAC. This patch provides this additional check of extended feature offchannel CAC support while checking for carrier state. Signed-off-by: Avinash Patil --- include/uapi/linux/nl80211.h | 3 +++ net/wireless/nl80211.c | 4 +++- 2 files changed, 6 insertions(+), 1 deletion(-) diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h index 735ab43..9ac9008 100644 --- a/include/uapi/linux/nl80211.h +++ b/include/uapi/linux/nl80211.h @@ -4205,11 +4205,14 @@ enum nl80211_feature_flags { /** * enum nl80211_ext_feature_index - bit index of extended features. * + * @NL80211_EXT_FEATURE_OFFCHAN_CAC: This device/driver supports + * offchannel Channel Availibility Check(CAC). * @NUM_NL80211_EXT_FEATURES: number of extended features. * @MAX_NL80211_EXT_FEATURES: highest extended feature index. */ enum nl80211_ext_feature_index { + NL80211_EXT_FEATURE_OFFCHAN_CAC, /* add new features before the definition below */ NUM_NL80211_EXT_FEATURES, MAX_NL80211_EXT_FEATURES = NUM_NL80211_EXT_FEATURES - 1 diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 39753de..b2abb37 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -6138,7 +6138,9 @@ static int nl80211_start_radar_detection(struct sk_buff *skb, if (err) return err; - if (netif_carrier_ok(dev)) + if (wiphy_ext_feature_isset(&rdev->wiphy, + NL80211_EXT_FEATURE_OFFCHAN_CAC) && + netif_carrier_ok(dev)) return -EBUSY; if (wdev->cac_started) -- 1.8.1.4