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hv_netvsc: Fix race of register_netdevice_notifier and VF register 

commit 85520856466ed6bc3b1ccb013cddac70ceb437db upstream.

If VF NIC is registered earlier, NETDEV_REGISTER event is replayed,
but NETDEV_POST_INIT is not.

Move register_netdevice_notifier() earlier, so the call back
function is set before probing.

Cc: stable@vger.kernel.org
Fixes: e04e7a7bbd ("hv_netvsc: Fix a deadlock by getting rtnl lock earlier in netvsc_probe()")
Reported-by: Dexuan Cui <decui@microsoft.com>
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Reviewed-by: Wojciech Drewek <wojciech.drewek@intel.com>
Reviewed-by: Dexuan Cui <decui@microsoft.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Haiyang Zhang 2023-11-19 08:23:42 -08:00 committed by Greg Kroah-Hartman
parent e8ef65c174
commit 5dd83db613
1 changed files with 7 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
drivers/net/hyperv/netvsc_drv.c
View File

@ -2789,12 +2789,17 @@ static int __init netvsc_drv_init(void)
}
netvsc_ring_bytes = ring_size * PAGE_SIZE;
register_netdevice_notifier(&netvsc_netdev_notifier);
ret = vmbus_driver_register(&netvsc_drv);
if (ret)
return ret;
goto err_vmbus_reg;
register_netdevice_notifier(&netvsc_netdev_notifier);
return 0;
err_vmbus_reg:
unregister_netdevice_notifier(&netvsc_netdev_notifier);
return ret;
}
MODULE_LICENSE("GPL");