mac80211: create channel list for fixed channel operation

Currently a device which has a DFS channel selected using the UCI
channel setting might switch to a non-DFS channel in case no chanlist is
provided (UCI setting "channels") when the radio detects a DFS event.

Automatically add a chanlist consisting of the configured channel when
the device does not operate in auto-channel mode and no chanlist set to
circumvent this issue.

Signed-off-by: David Bauer <[email protected]>

package/kernel/mac80211/files/lib/netifd/wireless/mac80211.sh

@@ -110,6 +110,9 @@ mac80211_hostapd_setup_base() {
 	json_get_values ht_capab_list ht_capab tx_burst
 	json_get_values channel_list channels
 
+	[ "$auto_channel" = 0 ] && [ -z "$channel_list" ] && \
+		channel_list="$channel"
+
 	set_default noscan 0
 
 	[ "$noscan" -gt 0 ] && hostapd_noscan=1