iwlwifi: disable FAT channel when not permitted

This patch disables FAT channel when it is not permitted according to
the EEPROM.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 19 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-core.c b/drivers/net/wireless/iwlwifi/iwl-core.c
index 010085aee5d4..c9bbfbb8cfa0 100644
--- a/drivers/net/wireless/iwlwifi/iwl-core.c
+++ b/drivers/net/wireless/iwlwifi/iwl-core.c
@@ -486,6 +486,25 @@ static int iwlcore_init_geos(struct iwl_priv *priv)
                         if (ch->flags & EEPROM_CHANNEL_RADAR)
                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
 
+                        switch (ch->fat_extension_channel) {
+                        case HT_IE_EXT_CHANNEL_ABOVE:
+                                /* only above is allowed, disable below */
+                                geo_ch->flags |= IEEE80211_CHAN_NO_FAT_BELOW;
+                                break;
+                        case HT_IE_EXT_CHANNEL_BELOW:
+                                /* only below is allowed, disable above */
+                                geo_ch->flags |= IEEE80211_CHAN_NO_FAT_ABOVE;
+                                break;
+                        case HT_IE_EXT_CHANNEL_NONE:
+                                /* fat not allowed: disable both*/
+                                geo_ch->flags |= (IEEE80211_CHAN_NO_FAT_ABOVE |
+                                                  IEEE80211_CHAN_NO_FAT_BELOW);
+                                break;
+                        case HT_IE_EXT_CHANNEL_MAX:
+                                /* both above and below are permitted */
+                                break;
+                        }
+
                         if (ch->max_power_avg > priv->max_channel_txpower_limit)
                                 priv->max_channel_txpower_limit =
                                     ch->max_power_avg;