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: e04e7a7bbd4b ("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

--- v5: Use a more idiomatic form for the error path, suggested by Simon Horman. v3: Divide it into two patches, suggested by Jakub Kicinski. v2: Fix rtnl_unlock() in error handling as found by Wojciech Drewek. --- drivers/net/hyperv/netvsc_drv.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c index 5e528a76f5f5..b7dfd51f09e6 100644 --- a/drivers/net/hyperv/netvsc_drv.c +++ b/drivers/net/hyperv/netvsc_drv.c @@ -2793,12 +2793,17 @@ 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");