From: Jo-Philipp Wich <jow@openwrt.org>
Date: Wed, 19 Jan 2011 21:37:44 +0000 (+0000)
Subject: luci-0.10: merge r6757
X-Git-Tag: 0.10.0~219
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=8383f6b9799eba944c612ae475e7f09ae88660b4;p=oweals%2Fluci.git

luci-0.10: merge r6757
---

diff --git a/libs/sys/luasrc/sys.lua b/libs/sys/luasrc/sys.lua
index 817217b90..1cf8b9f18 100644
--- a/libs/sys/luasrc/sys.lua
+++ b/libs/sys/luasrc/sys.lua
@@ -722,10 +722,14 @@ end
 -- @param iface	Wireless interface (optional)
 -- @return		Table of available channels
 function wifi.channels(iface)
-	local t = iwinfo.type(iface or "")
+	local stat, iwinfo = pcall(require, "iwinfo")
 	local cns
-	if iface and t and iwinfo[t] then
-		cns = iwinfo[t].freqlist(iface)
+
+	if stat then
+		local t = iwinfo.type(iface or "")
+		if iface and t and iwinfo[t] then
+			cns = iwinfo[t].freqlist(iface)
+		end
 	end
 
 	if not cns or #cns == 0 then