b43: check band width

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/b43/main.c b/drivers/net/wireless/b43/main.c
index c699e46..6d7cf3c2 100644
--- a/drivers/net/wireless/b43/main.c
+++ b/drivers/net/wireless/b43/main.c
@@ -3576,6 +3576,12 @@
 	dev = wl->current_dev;
 	phy = &dev->phy;
 
+	if (conf_is_ht(conf))
+		phy->is_40mhz =
+			(conf_is_ht40_minus(conf) || conf_is_ht40_plus(conf));
+	else
+		phy->is_40mhz = false;
+
 	b43_mac_suspend(dev);
 
 	if (changed & IEEE80211_CONF_CHANGE_RETRY_LIMITS)