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 <patila@xxxxxxxxxxx>
---
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..c318802 100644
--- a/include/uapi/linux/nl80211.h
+++ b/include/uapi/linux/nl80211.h
@@ -4205,10 +4205,13 @@ 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 Availability 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,
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
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