moved the rx thread create and stop functions to the init and exit, multiple cards works now

network_device/flxnet_dev.c

@@ -203,7 +203,6 @@ struct flxnet_peer *find_peer_for_netdev(struct net_device *dev) {
 	return return_peer;
 }
 
-
 // removes the peer from the network
 void flxnet_remove_peer(struct flxnet_peer *peer) {
 	int rv;
@@ -631,8 +630,8 @@ int send_recv_thread(void *data) {
 				}
 			}
 
-			if (message_level & NETIF_MSG_INTR)
-			 	pr_info("flxnet: wake up worker thread %s\n", __FUNCTION__);
+			//if (message_level & NETIF_MSG_INTR)
+			// 	pr_info("flxnet: wake up worker thread %s\n", __FUNCTION__);
 
 			tx_all_packets(peer);
 
@@ -663,19 +662,6 @@ int open(struct net_device *dev) {
 	mutex_lock(&flxnet_mutex);
 	tx_queue_reset(dev); 		// clear TX queue
 
-	// enable RX side
-	if (message_level & NETIF_MSG_IFUP)
-		pr_info("flxnet_dev: initialize RX thread and timer\n");
-	recv_task = kthread_create(send_recv_thread, NULL, "flxnet RX thread");
-	if (IS_ERR(recv_task)) {
-		mutex_unlock(&flxnet_mutex);
-		pr_err("flxnet_dev: failed to create RX thread in %s\n", __FUNCTION__);
-		return -1;
-	}
-
-	wake_up_process(recv_task);
-	mod_timer(&recv_timer, jiffies + msecs_to_jiffies(POLL_PERIOD_MS));
-
 	// enable TX side
 	if (message_level & NETIF_MSG_IFUP)
 		pr_info("flxnet_dev: start netif queue\n");
@@ -685,16 +671,9 @@ int open(struct net_device *dev) {
 	return 0;
 }
 
+
 int stop(struct net_device *dev) {
 	mutex_lock(&flxnet_mutex);
-
-	// disable RX side	
-	if (message_level & NETIF_MSG_IFDOWN)
-		pr_info("flxnet_dev: stop RX thread\n");	
-	wake_up_interruptible(&recv_queue);
-	kthread_stop(recv_task);
-	del_timer_sync(&recv_timer);
-
 	// disable TX side
 	if (message_level & NETIF_MSG_IFDOWN)
 		pr_info("flxnet_dev: stop netif queue\n");
@@ -1036,11 +1015,32 @@ int __init flxnet_dev_init(void) {
 	init_waitqueue_head(&recv_queue);
 	timer_setup(&recv_timer, recv_timer_function, 0);
 	INIT_LIST_HEAD(&peer_list);
+
+	// enable RX side
+	if (message_level & NETIF_MSG_IFUP)
+		pr_info("flxnet_dev: initialize RX thread and timer\n");
+	recv_task = kthread_create(send_recv_thread, NULL, "flxnet RX thread");
+	if (IS_ERR(recv_task)) {
+		pr_err("flxnet_dev: failed to create RX thread in %s\n", __FUNCTION__);
+		return -1;
+	}
+
+	wake_up_process(recv_task);
+	mod_timer(&recv_timer, jiffies + msecs_to_jiffies(POLL_PERIOD_MS));
+
 	return 0;
 }
 
 void __exit flxnet_dev_exit(void) {	
 	pr_info("flxnet_dev: removing %s driver\n", DRV_NAME);
+
+	// disable RX side	
+	if (message_level & NETIF_MSG_IFDOWN)
+		pr_info("flxnet_dev: stop RX thread\n");	
+	wake_up_interruptible(&recv_queue);
+	kthread_stop(recv_task);
+	del_timer_sync(&recv_timer);
+
 	mutex_destroy(&peer_mutex);
 	mutex_destroy(&flxnet_mutex);
 }

network_device/flxnet_pcie.c

@@ -102,7 +102,6 @@ static void flxnet_pcie_exit(void) {
 		pr_info("flxnet_pcie: list not empty - deconfiguring PCIe devices\n");
 		list_for_each_entry_safe(fdev, tmp, &fdev_list, fdev_entry) {
 			flxnet_remove_peer(fdev->peer);
-			list_del(&fdev->fdev_entry);
 			deconfigure_device(fdev);
 		}
 	}
@@ -228,6 +227,7 @@ static void deconfigure_device(struct pcie_flx_serial_device *fdev) {
 	pci_dev_put(pdev);
 	pci_disable_device(pdev);
 	pci_release_region(pdev, bar_idx);
+	list_del(&fdev->fdev_entry);
 	kfree(fdev);
 }