luci-mod-admin-full: allow unset txpower value

Sometimes txpower is not set so we should have an option with empty
value to let it stay unset.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>

diff --git a/modules/luci-mod-admin-full/luasrc/model/cbi/admin_network/wifi.lua b/modules/luci-mod-admin-full/luasrc/model/cbi/admin_network/wifi.lua
index 2dff4dd..91d0929 100644 (file)
--- a/modules/luci-mod-admin-full/luasrc/model/cbi/admin_network/wifi.lua
+++ b/modules/luci-mod-admin-full/luasrc/model/cbi/admin_network/wifi.lua
@@ -94,7 +94,7 @@ local function txpower_current(pwr, list)
                        end
                end
        end
-       return (list[#list] and list[#list].driver_dbm) or pwr or 0
+       return pwr or ""
 end
 
 local iw = luci.sys.wifi.getiwinfo(arg[1])
@@ -191,7 +191,7 @@ end
 ------------------- MAC80211 Device ------------------
 
 if hwtype == "mac80211" then
-       if #tx_power_list > 1 then
+       if #tx_power_list > 0 then
                tp = s:taboption("general", ListValue,
                        "txpower", translate("Transmit Power"), "dBm")
                tp.rmempty = true
@@ -200,6 +200,7 @@ if hwtype == "mac80211" then
                        return txpower_current(Value.cfgvalue(...), tx_power_list)
                end
 
+               tp:value("", translate("auto"))
                for _, p in ipairs(tx_power_list) do
                        tp:value(p.driver_dbm, "%i dBm (%i mW)"
                                %{ p.display_dbm, p.display_mw })
@@ -251,6 +252,7 @@ if hwtype == "atheros" then
                return txpower_current(Value.cfgvalue(...), tx_power_list)
        end
 
+       tp:value("", translate("auto"))
        for _, p in ipairs(tx_power_list) do
                tp:value(p.driver_dbm, "%i dBm (%i mW)"
                        %{ p.display_dbm, p.display_mw })
@@ -308,6 +310,7 @@ if hwtype == "broadcom" then
                return txpower_current(Value.cfgvalue(...), tx_power_list)
        end
 
+       tp:value("", translate("auto"))
        for _, p in ipairs(tx_power_list) do
                tp:value(p.driver_dbm, "%i dBm (%i mW)"
                        %{ p.display_dbm, p.display_mw })