iwlagn: store the irq number to iwl_bus just like dev

Since the irq number is just an unsigned int, store it inside iwl_bus
instead of calling the get_irq ops every time it is needed.
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-agn.c

@@ -3496,6 +3496,7 @@ int iwl_probe(void *bus_specific, struct iwl_bus_ops *bus_ops,
 	priv->bus.priv = priv;
 	priv->bus.bus_specific = bus_specific;
 	priv->bus.ops = bus_ops;
+	priv->bus.irq = priv->bus.ops->get_irq(&priv->bus);
 	priv->bus.ops->set_drv_data(&priv->bus, priv);
 	priv->bus.dev = priv->bus.ops->get_dev(&priv->bus);
 
@@ -3603,11 +3604,10 @@ int iwl_probe(void *bus_specific, struct iwl_bus_ops *bus_ops,
 	 ********************/
 	iwl_alloc_isr_ict(priv);
 
-	err = request_irq(priv->bus.ops->get_irq(&priv->bus), iwl_isr_ict,
-			  IRQF_SHARED, DRV_NAME, priv);
+	err = request_irq(priv->bus.irq, iwl_isr_ict, IRQF_SHARED,
+			  DRV_NAME, priv);
 	if (err) {
-		IWL_ERR(priv, "Error allocating IRQ %d\n",
-			priv->bus.ops->get_irq(&priv->bus));
+		IWL_ERR(priv, "Error allocating IRQ %d\n", priv->bus.irq);
 		goto out_uninit_drv;
 	}
 
@@ -3644,7 +3644,7 @@ int iwl_probe(void *bus_specific, struct iwl_bus_ops *bus_ops,
  out_destroy_workqueue:
 	destroy_workqueue(priv->workqueue);
 	priv->workqueue = NULL;
-	free_irq(priv->bus.ops->get_irq(&priv->bus), priv);
+	free_irq(priv->bus.irq, priv);
 	iwl_free_isr_ict(priv);
  out_uninit_drv:
 	iwl_uninit_drv(priv);
@@ -3716,7 +3716,7 @@ void __devexit iwl_remove(struct iwl_priv * priv)
 	priv->workqueue = NULL;
 	iwl_free_traffic_mem(priv);
 
-	free_irq(priv->bus.ops->get_irq(&priv->bus), priv);
+	free_irq(priv->bus.irq, priv);
 	priv->bus.ops->set_drv_data(&priv->bus, NULL);
 
 	iwl_uninit_drv(priv);

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

@@ -125,7 +125,7 @@ irqreturn_t iwl_isr_ict(int irq, void *data);
 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
 {
 	/* wait to make sure we flush pending tasklet*/
-	synchronize_irq(priv->bus.ops->get_irq(&priv->bus));
+	synchronize_irq(priv->bus.irq);
 	tasklet_kill(&priv->irq_tasklet);
 }
 

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

@@ -1224,6 +1224,7 @@ struct iwl_bus {
 	struct iwl_priv *priv; /* driver's context */
 	struct device *dev;
 	struct iwl_bus_ops *ops;
+	unsigned int irq;
 };
 
 struct iwl_priv {