cfg80211: DFS get CAC time from regulatory database

Send Channel Availability Check time as a parameter
of start_radar_detection() callback.
Get CAC time from regulatory database.

Signed-off-by: Janusz Dziedzic <janusz.dziedzic@tieto.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 8 insertions, 1 deletions

diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 9f7ebf94a050..8fa02a3fa7f7 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -5779,6 +5779,7 @@ static int nl80211_start_radar_detection(struct sk_buff *skb,
         struct wireless_dev *wdev = dev->ieee80211_ptr;
         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);
@@ -5814,11 +5815,17 @@ static int nl80211_start_radar_detection(struct sk_buff *skb,
         if (err)
                 return err;
 
-        err = rdev->ops->start_radar_detection(&rdev->wiphy, dev, &chandef);
+        cac_time_ms = cfg80211_chandef_dfs_cac_time(&rdev->wiphy, &chandef);
+        if (WARN_ON(!cac_time_ms))
+                cac_time_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
+
+        err = rdev->ops->start_radar_detection(&rdev->wiphy, dev, &chandef,
+                                               cac_time_ms);
         if (!err) {
                 wdev->chandef = chandef;
                 wdev->cac_started = true;
                 wdev->cac_start_time = jiffies;
+                wdev->cac_time_ms = cac_time_ms;
         }
         return err;
 }