[PATCH] zd1211rw: Allow channels 1-13 in Japan

Eric Goff found that he could not use his ZD1211 device which is
programmed for the Japan regulatory domain. It turns out that ZyDAS
deviate from the spec here: they do not use the newer Japan region code
(0x41) but their drivers do operate as if the newer Japan legal
frequency range is in effect.

Signed-off-by: Daniel Drake <dsd@gentoo.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/zd1211rw/zd_ieee80211.c

@@ -37,7 +37,12 @@ static const struct channel_range channel_ranges[] = {
 	[ZD_REGDOMAIN_JAPAN]	 = { 1, 14},
 	[ZD_REGDOMAIN_SPAIN]	 = { 1, 14},
 	[ZD_REGDOMAIN_FRANCE]	 = { 1, 14},
-	[ZD_REGDOMAIN_JAPAN_ADD] = {14, 15},
+
+	/* Japan originally only had channel 14 available (see CHNL_ID 0x40 in
+	 * 802.11). However, in 2001 the range was extended to include channels
+	 * 1-13. The ZyDAS devices still use the old region code but are
+	 * designed to allow the extra channel access in Japan. */
+	[ZD_REGDOMAIN_JAPAN_ADD] = { 1, 15},
 };
 
 const struct channel_range *zd_channel_range(u8 regdomain)