iwlwifi: stop_hw replace enable_rfkill_int

This trans_ops->stop_hw leaves the RFKILL interrupt enabled,
we can call that one instead of enable_rfkill_int. By that,
we reduce the numbers of acceesses to the NIC from the upper
layers.
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>

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

@@ -297,12 +297,6 @@ static inline bool iwl_advanced_bt_coexist(struct iwl_priv *priv)
 	       cfg(priv)->bt_params->advanced_bt_coexist;
 }
 
-static inline void iwl_enable_rfkill_int(struct iwl_priv *priv)
-{
-	IWL_DEBUG_ISR(priv, "Enabling rfkill interrupt\n");
-	iwl_write32(trans(priv), CSR_INT_MASK, CSR_INT_BIT_RF_KILL);
-}
-
 extern bool bt_siso_mode;
 
 #endif /* __iwl_core_h__ */

drivers/net/wireless/iwlwifi/iwl-mac80211.c

@@ -346,9 +346,10 @@ static void iwlagn_mac_stop(struct ieee80211_hw *hw)
 	flush_workqueue(priv->shrd->workqueue);
 
 	/* User space software may expect getting rfkill changes
-	 * even if interface is down */
-	iwl_write32(trans(priv), CSR_INT, 0xFFFFFFFF);
-	iwl_enable_rfkill_int(priv);
+	 * even if interface is down, trans->down will leave the RF
+	 * kill interrupt enabled
+	 */
+	iwl_trans_stop_hw(trans(priv));
 
 	IWL_DEBUG_MAC80211(priv, "leave\n");
 }

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

@@ -1149,8 +1149,10 @@ void iwl_irq_tasklet(struct iwl_trans *trans)
 	if (test_bit(STATUS_INT_ENABLED, &trans->shrd->status))
 		iwl_enable_interrupts(trans);
 	/* Re-enable RF_KILL if it occurred */
-	else if (handled & CSR_INT_BIT_RF_KILL)
-		iwl_enable_rfkill_int(priv(trans));
+	else if (handled & CSR_INT_BIT_RF_KILL) {
+		IWL_DEBUG_ISR(trans, "Enabling rfkill interrupt\n");
+		iwl_write32(trans, CSR_INT_MASK, CSR_INT_BIT_RF_KILL);
+	}
 }
 
 /******************************************************************************

drivers/net/wireless/iwlwifi/iwl-trans-pcie.c

@@ -1532,6 +1532,8 @@ static void iwl_trans_pcie_stop_hw(struct iwl_trans *trans)
 {
 	iwl_apm_stop(trans);
 
+	iwl_write32(trans, CSR_INT, 0xFFFFFFFF);
+
 	/* Even if we stop the HW, we still want the RF kill interrupt */
 	IWL_DEBUG_ISR(trans, "Enabling rfkill interrupt\n");
 	iwl_write32(trans, CSR_INT_MASK, CSR_INT_BIT_RF_KILL);