From: Roi Dayan Date: Tue, 26 Feb 2019 14:18:19 +0000 (+0200) Subject: net/mlx5e: Properly get the PF number phys port name ndo X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=5b33eba99fbcf467b913d444dd65313c27623b1a;p=openwrt%2Fstaging%2Fblogic.git net/mlx5e: Properly get the PF number phys port name ndo Currently, we fail to retrieve the PF number in some cases (e.g single ported cards, lag capability), this further results in a call trace issued by the rtnetlink code, since the error value is not -EOPNOTSUPP. Change the implementation to be independent from the lag code and function properly on both two ports and single ported cards. Call Trace: [ 194.525057] mlx5_core 0000:82:00.0: mlx5_lag_get_pf_num:605:(pid 837): no lag device, can't get pf num [ 194.525804] WARNING: CPU: 7 PID: 837 at net/core/rtnetlink.c:3457 rtmsg_ifinfo_build_skb+0x131/0x160 [ 194.529952] CPU: 7 PID: 837 Comm: kworker/7:3 Tainted: G W O 5.0.0-rc7+ #3 [ 194.531307] Workqueue: events linkwatch_event [ 194.531697] RIP: 0010:rtmsg_ifinfo_build_skb+0x131/0x160 [ 194.545007] Call Trace: [ 194.545406] rtmsg_ifinfo_event.part.29+0x1b/0xb0 [ 194.545810] rtmsg_ifinfo+0x51/0x80 [ 194.546209] netdev_state_change+0xc7/0x110 [ 194.546608] ? dev_valid_name+0x1b0/0x1b0 [ 194.547010] ? __local_bh_enable_ip+0xef/0x1d0 [ 194.547411] ? lockdep_hardirqs_on+0x3ea/0x560 [ 194.547811] ? linkwatch_do_dev+0x9b/0x100 [ 194.548207] linkwatch_do_dev+0x9b/0x100 [ 194.548605] __linkwatch_run_queue+0x244/0x430 [ 194.549014] ? linkwatch_schedule_work+0x100/0x100 [ 194.549412] ? lock_acquire+0x10f/0x2d0 [ 194.549816] linkwatch_event+0x3f/0x50 [ 194.550212] process_one_work+0x7d3/0x1460 Fixes: c12ecc230564 ("net/mlx5e: Move to use common phys port names for vport representors") Signed-off-by: Roi Dayan Acked-by: Or Gerlitz Signed-off-by: Saeed Mahameed --- diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c index a1a3e2774989..a66b6ed80b30 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c @@ -1129,16 +1129,17 @@ static int mlx5e_rep_get_phys_port_name(struct net_device *dev, struct mlx5e_priv *priv = netdev_priv(dev); struct mlx5e_rep_priv *rpriv = priv->ppriv; struct mlx5_eswitch_rep *rep = rpriv->rep; - int ret, pf_num; + unsigned int fn; + int ret; - ret = mlx5_lag_get_pf_num(priv->mdev, &pf_num); - if (ret) - return ret; + fn = PCI_FUNC(priv->mdev->pdev->devfn); + if (fn >= MLX5_MAX_PORTS) + return -EOPNOTSUPP; if (rep->vport == MLX5_VPORT_UPLINK) - ret = snprintf(buf, len, "p%d", pf_num); + ret = snprintf(buf, len, "p%d", fn); else - ret = snprintf(buf, len, "pf%dvf%d", pf_num, rep->vport - 1); + ret = snprintf(buf, len, "pf%dvf%d", fn, rep->vport - 1); if (ret >= len) return -EOPNOTSUPP;