iwlwifi: fix FAT channel config for 5000 series

The test to find out if we have FAT channels do not consider that
the value of regulatory_bands for the 5000 series is larger than its
eeprom size. Using the eeprom size is strange in itself.

Use a new EEPROM_REGULATORY_BAND_NO_FAT to indicate no FAT support
and test for that explicitly.
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Acked-by: Samuel Ortiz <samuel.ortiz@intel.com>
Tested-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/iwlwifi/iwl-3945.c

@@ -2738,8 +2738,8 @@ static struct iwl_lib_ops iwl3945_lib = {
 			EEPROM_REGULATORY_BAND_3_CHANNELS,
 			EEPROM_REGULATORY_BAND_4_CHANNELS,
 			EEPROM_REGULATORY_BAND_5_CHANNELS,
-			IWL3945_EEPROM_IMG_SIZE,
-			IWL3945_EEPROM_IMG_SIZE,
+			EEPROM_REGULATORY_BAND_NO_FAT,
+			EEPROM_REGULATORY_BAND_NO_FAT,
 		},
 		.verify_signature  = iwlcore_eeprom_verify_signature,
 		.acquire_semaphore = iwl3945_eeprom_acquire_semaphore,

drivers/net/wireless/iwlwifi/iwl-eeprom.c

@@ -532,10 +532,10 @@ int iwl_init_channel_map(struct iwl_priv *priv)
 	}
 
 	/* Check if we do have FAT channels */
-	if (priv->cfg->ops->lib->eeprom_ops.regulatory_bands[5] >=
-	    priv->cfg->eeprom_size &&
-	    priv->cfg->ops->lib->eeprom_ops.regulatory_bands[6] >=
-	    priv->cfg->eeprom_size)
+	if (priv->cfg->ops->lib->eeprom_ops.regulatory_bands[5] ==
+	    EEPROM_REGULATORY_BAND_NO_FAT &&
+	    priv->cfg->ops->lib->eeprom_ops.regulatory_bands[6] ==
+	    EEPROM_REGULATORY_BAND_NO_FAT)
 		return 0;
 
 	/* Two additional EEPROM bands for 2.4 and 5 GHz FAT channels */

drivers/net/wireless/iwlwifi/iwl-eeprom.h

@@ -370,6 +370,8 @@ struct iwl_eeprom_calib_info {
  */
 #define EEPROM_4965_REGULATORY_BAND_52_FAT_CHANNELS (2*0xA8)	/* 22 bytes */
 
+#define EEPROM_REGULATORY_BAND_NO_FAT			(0)
+
 struct iwl_eeprom_ops {
 	const u32 regulatory_bands[7];
 	int (*verify_signature) (struct iwl_priv *priv);