AcoSail/kernel_optimize_test
8
0
Fork 0
forked from luck/tmp_suning_uos_patched
Code Pull Requests Activity

net: move net_set_todo inside rollback_registered()

Browse Source 
commit 2014beea7eb165c745706b13659a0f1d0a9a2a61 upstream.

Commit 93ee31f14f ("[NET]: Fix free_netdev on register_netdev
failure.") moved net_set_todo() outside of rollback_registered()
so that rollback_registered() can be used in the failure path of
register_netdevice() but without risking a double free.

Since commit cf124db566 ("net: Fix inconsistent teardown and
release of private netdev state."), however, we have a better
way of handling that condition, since destructors don't call
free_netdev() directly.

After the change in commit c269a24ce057 ("net: make free_netdev()
more lenient with unregistering devices") we can now move
net_set_todo() back.

Reviewed-by: Edwin Peer <edwin.peer@broadcom.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Fedor Pchelkin <pchelkin@ispras.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jakub Kicinski 2022-07-15 19:26:29 +03:00 committed by Greg Kroah-Hartman
parent 2e11856ec3
commit b1158677d4
1 changed files with 3 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
net/core/dev.c
View File

@ -9595,8 +9595,10 @@ static void rollback_registered_many(struct list_head *head)
synchronize_net();
list_for_each_entry(dev, head, unreg_list)
list_for_each_entry(dev, head, unreg_list) {
dev_put(dev);
net_set_todo(dev);
}
}
static void rollback_registered(struct net_device *dev)
@ -10147,7 +10149,6 @@ int register_netdevice(struct net_device *dev)
/* Expect explicit free_netdev() on failure */
dev->needs_free_netdev = false;
rollback_registered(dev);
net_set_todo(dev);
goto out;
}
/*
@ -10755,8 +10756,6 @@ void unregister_netdevice_queue(struct net_device *dev, struct list_head *head)
list_move_tail(&dev->unreg_list, head);
} else {
rollback_registered(dev);
/* Finish processing unregister after unlock */
net_set_todo(dev);
}
}
EXPORT_SYMBOL(unregister_netdevice_queue);
@ -10770,12 +10769,8 @@ EXPORT_SYMBOL(unregister_netdevice_queue);
*/
void unregister_netdevice_many(struct list_head *head)
{
struct net_device *dev;
if (!list_empty(head)) {
rollback_registered_many(head);
list_for_each_entry(dev, head, unreg_list)
net_set_todo(dev);
list_del(head);
}
}