X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=net%2Fcore%2Fnet-sysfs.c;h=53ea262ecafd0c1e537a7e63f313745fb7ba53bb;hb=5f1c802ca69b3c076eea5fabc8839ffa5ddd8c8f;hp=9c01c642cf9ef384fe54e56243b102ef838d0a62;hpb=89d714ab6043bca7356b5c823f5335f5dce1f930;p=platform%2Fkernel%2Flinux-starfive.git

diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
index 9c01c64..53ea262 100644
--- a/net/core/net-sysfs.c
+++ b/net/core/net-sysfs.c
@@ -488,14 +488,6 @@ static ssize_t proto_down_store(struct device *dev,
 				struct device_attribute *attr,
 				const char *buf, size_t len)
 {
-	struct net_device *netdev = to_net_dev(dev);
-
-	/* The check is also done in change_proto_down; this helps returning
-	 * early without hitting the trylock/restart in netdev_store.
-	 */
-	if (!netdev->netdev_ops->ndo_change_proto_down)
-		return -EOPNOTSUPP;
-
 	return netdev_store(dev, attr, buf, len, change_proto_down);
 }
 NETDEVICE_SHOW_RW(proto_down, fmt_dec);
@@ -1012,7 +1004,7 @@ static void rx_queue_release(struct kobject *kobj)
 #endif
 
 	memset(kobj, 0, sizeof(*kobj));
-	dev_put(queue->dev);
+	dev_put_track(queue->dev, &queue->dev_tracker);
 }
 
 static const void *rx_queue_namespace(struct kobject *kobj)
@@ -1052,7 +1044,7 @@ static int rx_queue_add_kobject(struct net_device *dev, int index)
 	/* Kobject_put later will trigger rx_queue_release call which
 	 * decreases dev refcount: Take that reference here
 	 */
-	dev_hold(queue->dev);
+	dev_hold_track(queue->dev, &queue->dev_tracker, GFP_KERNEL);
 
 	kobj->kset = dev->queues_kset;
 	error = kobject_init_and_add(kobj, &rx_queue_ktype, NULL,
@@ -1201,11 +1193,7 @@ static const struct sysfs_ops netdev_queue_sysfs_ops = {
 
 static ssize_t tx_timeout_show(struct netdev_queue *queue, char *buf)
 {
-	unsigned long trans_timeout;
-
-	spin_lock_irq(&queue->_xmit_lock);
-	trans_timeout = queue->trans_timeout;
-	spin_unlock_irq(&queue->_xmit_lock);
+	unsigned long trans_timeout = atomic_long_read(&queue->trans_timeout);
 
 	return sprintf(buf, fmt_ulong, trans_timeout);
 }
@@ -1452,7 +1440,7 @@ static ssize_t xps_queue_show(struct net_device *dev, unsigned int index,
 
 		for (i = map->len; i--;) {
 			if (map->queues[i] == index) {
-				set_bit(j, mask);
+				__set_bit(j, mask);
 				break;
 			}
 		}
@@ -1619,7 +1607,7 @@ static void netdev_queue_release(struct kobject *kobj)
 	struct netdev_queue *queue = to_netdev_queue(kobj);
 
 	memset(kobj, 0, sizeof(*kobj));
-	dev_put(queue->dev);
+	dev_put_track(queue->dev, &queue->dev_tracker);
 }
 
 static const void *netdev_queue_namespace(struct kobject *kobj)
@@ -1659,7 +1647,7 @@ static int netdev_queue_add_kobject(struct net_device *dev, int index)
 	/* Kobject_put later will trigger netdev_queue_release call
 	 * which decreases dev refcount: Take that reference here
 	 */
-	dev_hold(queue->dev);
+	dev_hold_track(queue->dev, &queue->dev_tracker, GFP_KERNEL);
 
 	kobj->kset = dev->queues_kset;
 	error = kobject_init_and_add(kobj, &netdev_queue_ktype, NULL,
@@ -1706,6 +1694,13 @@ netdev_queue_update_kobjects(struct net_device *dev, int old_num, int new_num)
 	int i;
 	int error = 0;
 
+	/* Tx queue kobjects are allowed to be updated when a device is being
+	 * unregistered, but solely to remove queues from qdiscs. Any path
+	 * adding queues should be fixed.
+	 */
+	WARN(dev->reg_state == NETREG_UNREGISTERING && new_num > old_num,
+	     "New queues can't be registered after device unregistration.");
+
 	for (i = old_num; i < new_num; i++) {
 		error = netdev_queue_add_kobject(dev, i);
 		if (error) {
@@ -1820,6 +1815,9 @@ static void remove_queue_kobjects(struct net_device *dev)
 
 	net_rx_queue_update_kobjects(dev, real_rx, 0);
 	netdev_queue_update_kobjects(dev, real_tx, 0);
+
+	dev->real_num_rx_queues = 0;
+	dev->real_num_tx_queues = 0;
 #ifdef CONFIG_SYSFS
 	kset_unregister(dev->queues_kset);
 #endif