1 files changed, 27 insertions, 0 deletions

diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index ec54e1aac8e2..7d20d844ca60 100644
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -135,6 +135,33 @@ static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region)
         return "Unknown";
 }
 
+enum nl80211_dfs_regions reg_get_dfs_region(struct wiphy *wiphy)
+{
+        const struct ieee80211_regdomain *regd = NULL;
+        const struct ieee80211_regdomain *wiphy_regd = NULL;
+
+        regd = get_cfg80211_regdom();
+        if (!wiphy)
+                goto out;
+
+        wiphy_regd = get_wiphy_regdom(wiphy);
+        if (!wiphy_regd)
+                goto out;
+
+        if (wiphy_regd->dfs_region == regd->dfs_region)
+                goto out;
+
+        REG_DBG_PRINT("%s: device specific dfs_region "
+                      "(%s) disagrees with cfg80211's "
+                      "central dfs_region (%s)\n",
+                      dev_name(&wiphy->dev),
+                      reg_dfs_region_str(wiphy_regd->dfs_region),
+                      reg_dfs_region_str(regd->dfs_region));
+
+out:
+        return regd->dfs_region;
+}
+
 static void rcu_free_regdom(const struct ieee80211_regdomain *r)
 {
         if (!r)