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Diffstat (limited to 'net/wireless/nl80211.c')
-rw-r--r--net/wireless/nl80211.c12
1 files changed, 8 insertions, 4 deletions
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index a910150f8169..fe27ab443d01 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -7551,12 +7551,13 @@ static int nl80211_start_radar_detection(struct sk_buff *skb,
struct cfg80211_registered_device *rdev = info->user_ptr[0];
struct net_device *dev = info->user_ptr[1];
struct wireless_dev *wdev = dev->ieee80211_ptr;
+ struct wiphy *wiphy = wdev->wiphy;
struct cfg80211_chan_def chandef;
enum nl80211_dfs_regions dfs_region;
unsigned int cac_time_ms;
int err;
- dfs_region = reg_get_dfs_region(wdev->wiphy);
+ dfs_region = reg_get_dfs_region(wiphy);
if (dfs_region == NL80211_DFS_UNSET)
return -EINVAL;
@@ -7570,17 +7571,20 @@ static int nl80211_start_radar_detection(struct sk_buff *skb,
if (wdev->cac_started)
return -EBUSY;
- err = cfg80211_chandef_dfs_required(wdev->wiphy, &chandef,
- wdev->iftype);
+ err = cfg80211_chandef_dfs_required(wiphy, &chandef, wdev->iftype);
if (err < 0)
return err;
if (err == 0)
return -EINVAL;
- if (!cfg80211_chandef_dfs_usable(wdev->wiphy, &chandef))
+ if (!cfg80211_chandef_dfs_usable(wiphy, &chandef))
return -EINVAL;
+ /* CAC start is offloaded to HW and can't be started manually */
+ if (wiphy_ext_feature_isset(wiphy, NL80211_EXT_FEATURE_DFS_OFFLOAD))
+ return -EOPNOTSUPP;
+
if (!rdev->ops->start_radar_detection)
return -EOPNOTSUPP;