nl80211: allow the use of DFS channel in mesh

This permits the use of DFS channel once the CAC is conducted and
no radar is detected.

Signed-off-by: Chun-Yeow Yeoh <yeohchunyeow@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 11 insertions, 2 deletions

diff --git a/net/wireless/mesh.c b/net/wireless/mesh.c
index b0e1869de7de..9c7a11ae7936 100644
--- a/net/wireless/mesh.c
+++ b/net/wireless/mesh.c
@@ -99,6 +99,7 @@ int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
                          const struct mesh_config *conf)
 {
         struct wireless_dev *wdev = dev->ieee80211_ptr;
+        u8 radar_detect_width = 0;
         int err;
 
         BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN != IEEE80211_MAX_MESH_ID_LEN);
@@ -177,8 +178,16 @@ int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &setup->chandef))
                 return -EINVAL;
 
-        err = cfg80211_can_use_chan(rdev, wdev, setup->chandef.chan,
-                                    CHAN_MODE_SHARED);
+        err = cfg80211_chandef_dfs_required(wdev->wiphy, &setup->chandef);
+        if (err < 0)
+                return err;
+        if (err)
+                radar_detect_width = BIT(setup->chandef.width);
+
+        err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
+                                           setup->chandef.chan,
+                                           CHAN_MODE_SHARED,
+                                           radar_detect_width);
         if (err)
                 return err;