iwlwifi: fix iwl4965 temperature callback calibration issue

The patch fixes the temperature calibration issue introduced by the
patch "iwlwifi: move RX stats to core, and move temperature to handler".
It also remove the second parameter "stats" since it is already copied
to priv->statistics.

Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/iwlwifi/iwl-4965.c

@@ -1879,21 +1879,9 @@ static int iwl4965_is_temp_calib_needed(struct iwl_priv *priv)
 	return 1;
 }
 
-static void iwl4965_temperature_calib(struct iwl_priv *priv,
-				      struct iwl_notif_statistics *stats)
+static void iwl4965_temperature_calib(struct iwl_priv *priv)
 {
 	s32 temp;
-	int change = ((priv->statistics.general.temperature !=
-		   stats->general.temperature) ||
-		  ((priv->statistics.flag &
-		    STATISTICS_REPLY_FLG_FAT_MODE_MSK) !=
-		   (stats->flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)));
-
-	/* If the hardware hasn't reported a change in
-	 * temperature then don't bother computing a
-	 * calibrated temperature value */
-	if (!change)
-		return;
 
 	temp = iwl4965_hw_get_temperature(priv);
 	if (temp < 0)

drivers/net/wireless/iwlwifi/iwl-5000.c

@@ -1422,11 +1422,10 @@ static int  iwl5000_send_tx_power(struct iwl_priv *priv)
 				       NULL);
 }
 
-static void iwl5000_temperature(struct iwl_priv *priv,
-				struct iwl_notif_statistics *stats)
+static void iwl5000_temperature(struct iwl_priv *priv)
 {
 	/* store temperature from statistics (in Celsius) */
-	priv->temperature = le32_to_cpu(stats->general.temperature);
+	priv->temperature = le32_to_cpu(priv->statistics.general.temperature);
 }
 
 static struct iwl_hcmd_ops iwl5000_hcmd = {

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

@@ -140,8 +140,7 @@ struct iwl_lib_ops {
 	int (*set_power)(struct iwl_priv *priv, void *cmd);
 	int (*send_tx_power) (struct iwl_priv *priv);
 	void (*update_chain_flags)(struct iwl_priv *priv);
-	void (*temperature) (struct iwl_priv *priv,
-		struct iwl_notif_statistics *stats);
+	void (*temperature) (struct iwl_priv *priv);
 	/* eeprom operations (as defined in iwl-eeprom.h) */
 	struct iwl_eeprom_ops eeprom_ops;
 };

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

@@ -557,11 +557,18 @@ static void iwl_rx_calc_noise(struct iwl_priv *priv)
 void iwl_rx_statistics(struct iwl_priv *priv,
 			      struct iwl_rx_mem_buffer *rxb)
 {
+	int change;
 	struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
 
 	IWL_DEBUG_RX("Statistics notification received (%d vs %d).\n",
 		     (int)sizeof(priv->statistics), pkt->len);
 
+	change = ((priv->statistics.general.temperature !=
+		   pkt->u.stats.general.temperature) ||
+		  ((priv->statistics.flag &
+		    STATISTICS_REPLY_FLG_FAT_MODE_MSK) !=
+		   (pkt->u.stats.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)));
+
 	memcpy(&priv->statistics, &pkt->u.stats, sizeof(priv->statistics));
 
 	set_bit(STATUS_STATISTICS, &priv->status);
@@ -581,8 +588,8 @@ void iwl_rx_statistics(struct iwl_priv *priv,
 
 	iwl_leds_background(priv);
 
-	if (priv->cfg->ops->lib->temperature)
-		priv->cfg->ops->lib->temperature(priv, &pkt->u.stats);
+	if (priv->cfg->ops->lib->temperature && change)
+		priv->cfg->ops->lib->temperature(priv);
 }
 EXPORT_SYMBOL(iwl_rx_statistics);