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Commit 0f524a80 authored by David Ahern's avatar David Ahern Committed by David S. Miller
Browse files

net: Add warning if any lower device is still in adjacency list 



Lower list should be empty just like upper.

Signed-off-by: default avatarDavid Ahern <dsa@cumulusnetworks.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent f1170fd4

net/core/dev.c

+15 −0
Original line number Diff line number Diff line
@@ -5219,6 +5219,20 @@ struct net_device *netdev_master_upper_dev_get(struct net_device *dev) 
}

EXPORT_SYMBOL(netdev_master_upper_dev_get);



/**

 * netdev_has_any_lower_dev - Check if device is linked to some device

 * @dev: device

 *

 * Find out if a device is linked to a lower device and return true in case

 * it is. The caller must hold the RTNL lock.

 */

static bool netdev_has_any_lower_dev(struct net_device *dev)

{

	ASSERT_RTNL();



	return !list_empty(&dev->adj_list.lower);

}



void *netdev_adjacent_get_private(struct list_head *adj_list)

{

	struct netdev_adjacent *adj;
@@ -6616,6 +6630,7 @@ static void rollback_registered_many(struct list_head *head) 


		/* Notifier chain MUST detach us all upper devices. */

		WARN_ON(netdev_has_any_upper_dev(dev));

		WARN_ON(netdev_has_any_lower_dev(dev));



		/* Remove entries from kobject tree */

		netdev_unregister_kobject(dev);