From b7f1129a2c77f1dacd413a822fec90e2922855f8 Mon Sep 17 00:00:00 2001 From: Stephen Hemminger Date: Wed, 7 Mar 2018 13:49:12 -0800 Subject: [PATCH] hv_netvsc: fix locking during VF setup [ Upstream commit b0dee7910317f41f398838992516af6a3b981d86 ] The dev_uc/mc_sync calls need to have the device address list locked. This was spotted by running with lockdep enabled. Fixes: bee9d41b37ea ("hv_netvsc: propagate rx filters to VF") Signed-off-by: Stephen Hemminger Signed-off-by: David S. Miller Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- drivers/net/hyperv/netvsc_drv.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c index 99b71b4..3a7241c 100644 --- a/drivers/net/hyperv/netvsc_drv.c +++ b/drivers/net/hyperv/netvsc_drv.c @@ -1848,8 +1848,12 @@ static void __netvsc_vf_setup(struct net_device *ndev, /* set multicast etc flags on VF */ dev_change_flags(vf_netdev, ndev->flags | IFF_SLAVE); + + /* sync address list from ndev to VF */ + netif_addr_lock_bh(ndev); dev_uc_sync(vf_netdev, ndev); dev_mc_sync(vf_netdev, ndev); + netif_addr_unlock_bh(ndev); if (netif_running(ndev)) { ret = dev_open(vf_netdev); -- 2.7.4