diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c
index f70ee6dfb79e9b9da090bbb82d417ea0f7167664..638d0cbc704eca04f125b145dfee46de248fbf4b 100644
--- a/drivers/pci/pcie/aer.c
+++ b/drivers/pci/pcie/aer.c
@@ -42,14 +42,7 @@ struct aer_err_source {
 
 struct aer_rpc {
 	struct pci_dev *rpd;		/* Root Port device */
-	struct work_struct dpc_handler;
 	DECLARE_KFIFO(aer_fifo, struct aer_err_source, AER_ERROR_SOURCES_MAX);
-	int isr;
-	struct mutex rpc_mutex;		/*
-					 * only one thread could do
-					 * recovery on the same
-					 * root port hierarchy
-					 */
 };
 
 /* AER stats for the device */
@@ -1215,15 +1208,18 @@ static void aer_isr_one_error(struct aer_rpc *rpc,
  *
  * Invoked, as DPC, when root port records new detected error
  */
-static void aer_isr(struct work_struct *work)
+static irqreturn_t aer_isr(int irq, void *context)
 {
-	struct aer_rpc *rpc = container_of(work, struct aer_rpc, dpc_handler);
+	struct pcie_device *dev = (struct pcie_device *)context;
+	struct aer_rpc *rpc = get_service_data(dev);
 	struct aer_err_source uninitialized_var(e_src);
 
-	mutex_lock(&rpc->rpc_mutex);
+	if (kfifo_is_empty(&rpc->aer_fifo))
+		return IRQ_NONE;
+
 	while (kfifo_get(&rpc->aer_fifo, &e_src))
 		aer_isr_one_error(rpc, &e_src);
-	mutex_unlock(&rpc->rpc_mutex);
+	return IRQ_HANDLED;
 }
 
 /**
@@ -1251,8 +1247,7 @@ irqreturn_t aer_irq(int irq, void *context)
 	if (!kfifo_put(&rpc->aer_fifo, e_src))
 		return IRQ_HANDLED;
 
-	schedule_work(&rpc->dpc_handler);
-	return IRQ_HANDLED;
+	return IRQ_WAKE_THREAD;
 }
 EXPORT_SYMBOL_GPL(aer_irq);
 
@@ -1362,30 +1357,6 @@ static void aer_disable_rootport(struct aer_rpc *rpc)
 	pci_write_config_dword(pdev, pos + PCI_ERR_ROOT_STATUS, reg32);
 }
 
-/**
- * aer_alloc_rpc - allocate Root Port data structure
- * @dev: pointer to the pcie_dev data structure
- *
- * Invoked when Root Port's AER service is loaded.
- */
-static struct aer_rpc *aer_alloc_rpc(struct pcie_device *dev)
-{
-	struct aer_rpc *rpc;
-
-	rpc = kzalloc(sizeof(struct aer_rpc), GFP_KERNEL);
-	if (!rpc)
-		return NULL;
-
-	rpc->rpd = dev->port;
-	INIT_WORK(&rpc->dpc_handler, aer_isr);
-	mutex_init(&rpc->rpc_mutex);
-
-	/* Use PCIe bus function to store rpc into PCIe device */
-	set_service_data(dev, rpc);
-
-	return rpc;
-}
-
 /**
  * aer_remove - clean up resources
  * @dev: pointer to the pcie_dev data structure
@@ -1397,11 +1368,6 @@ static void aer_remove(struct pcie_device *dev)
 	struct aer_rpc *rpc = get_service_data(dev);
 
 	if (rpc) {
-		/* If register interrupt service, it must be free. */
-		if (rpc->isr)
-			free_irq(dev->irq, dev);
-
-		flush_work(&rpc->dpc_handler);
 		aer_disable_rootport(rpc);
 		kfree(rpc);
 		set_service_data(dev, NULL);
@@ -1421,15 +1387,17 @@ static int aer_probe(struct pcie_device *dev)
 	struct device *device = &dev->port->dev;
 
 	/* Alloc rpc data structure */
-	rpc = aer_alloc_rpc(dev);
+	rpc = kzalloc(sizeof(struct aer_rpc), GFP_KERNEL);
 	if (!rpc) {
 		dev_printk(KERN_DEBUG, device, "alloc AER rpc failed\n");
-		aer_remove(dev);
 		return -ENOMEM;
 	}
+	rpc->rpd = dev->port;
+	set_service_data(dev, rpc);
 
 	/* Request IRQ ISR */
-	status = request_irq(dev->irq, aer_irq, IRQF_SHARED, "aerdrv", dev);
+	status = request_threaded_irq(dev->irq, aer_irq, aer_isr,
+				      IRQF_SHARED, "aerdrv", dev);
 	if (status) {
 		dev_printk(KERN_DEBUG, device, "request AER IRQ %d failed\n",
 			   dev->irq);
@@ -1437,8 +1405,6 @@ static int aer_probe(struct pcie_device *dev)
 		return status;
 	}
 
-	rpc->isr = 1;
-
 	aer_enable_rootport(rpc);
 	dev_info(device, "AER enabled with IRQ %d\n", dev->irq);
 	return 0;