--- zzzz-none-000/linux-4.9.218/net/wireless/chan.c	2020-04-02 15:20:41.000000000 +0000
+++ seale-7590ac-750/linux-4.9.218/net/wireless/chan.c	2022-11-30 09:46:20.000000000 +0000
@@ -150,7 +150,7 @@
 	}
 }
 
-static int cfg80211_chandef_get_width(const struct cfg80211_chan_def *c)
+int cfg80211_chandef_get_width(const struct cfg80211_chan_def *c)
 {
 	int width;
 
@@ -251,6 +251,8 @@
 		if (!c || !(c->flags & IEEE80211_CHAN_RADAR))
 			continue;
 
+		pr_debug("Setting the DFS state of channel %hu to 0x%02x\n",
+			 c->hw_value, dfs_state);
 		c->dfs_state = dfs_state;
 		c->dfs_state_entered = jiffies;
 	}
@@ -277,6 +279,7 @@
 	cfg80211_set_chans_dfs_state(wiphy, chandef->center_freq2,
 				     width, dfs_state);
 }
+EXPORT_SYMBOL(cfg80211_set_dfs_state);
 
 static u32 cfg80211_get_start_freq(u32 center_freq,
 				   u32 bandwidth)