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| author | hselasky <hselasky@FreeBSD.org> | 2016-09-23 08:24:41 +0000 |
|---|---|---|
| committer | hselasky <hselasky@FreeBSD.org> | 2016-09-23 08:24:41 +0000 |
| commit | 77f0950ec9cc1ebc34452b0cf96a4b9d768e9f88 (patch) | |
| tree | 893aeaa335e13ac909bc34e7889a75981a76bbd4 /sys/dev/mlx5 | |
| parent | 70914e84195095a8c8ace743ed82cb8b57f1c7a0 (diff) | |
| download | FreeBSD-src-77f0950ec9cc1ebc34452b0cf96a4b9d768e9f88.zip FreeBSD-src-77f0950ec9cc1ebc34452b0cf96a4b9d768e9f88.tar.gz | |
MFC r305874:
mlx5en: Allow setting the software MTU size below 1500 bytes
The hardware MTU size can't be set to a value less than 1500 bytes due
to side-band management support. Allow setting the software MTU size
below 1500 bytes, thus creating a mismatch between hardware and
software MTU sizes.
Sponsored by: Mellanox Technologies
Diffstat (limited to 'sys/dev/mlx5')
| -rw-r--r-- | sys/dev/mlx5/mlx5_en/mlx5_en_main.c | 24 |
1 files changed, 12 insertions, 12 deletions
diff --git a/sys/dev/mlx5/mlx5_en/mlx5_en_main.c b/sys/dev/mlx5/mlx5_en/mlx5_en_main.c index 28007f3..70a1af8 100644 --- a/sys/dev/mlx5/mlx5_en/mlx5_en_main.c +++ b/sys/dev/mlx5/mlx5_en/mlx5_en_main.c @@ -2173,7 +2173,6 @@ mlx5e_set_dev_port_mtu(struct ifnet *ifp, int sw_mtu) int hw_mtu; int err; - err = mlx5_set_port_mtu(mdev, MLX5E_SW2HW_MTU(sw_mtu)); if (err) { if_printf(ifp, "%s: mlx5_set_port_mtu failed setting %d, err=%d\n", @@ -2181,19 +2180,20 @@ mlx5e_set_dev_port_mtu(struct ifnet *ifp, int sw_mtu) return (err); } err = mlx5_query_port_oper_mtu(mdev, &hw_mtu); - if (!err) { - ifp->if_mtu = MLX5E_HW2SW_MTU(hw_mtu); - - if (ifp->if_mtu != sw_mtu) { - if_printf(ifp, "Port MTU %d is different than " - "ifp mtu %d\n", sw_mtu, (int)ifp->if_mtu); - } - } else { + if (err) { if_printf(ifp, "Query port MTU, after setting new " "MTU value, failed\n"); - ifp->if_mtu = sw_mtu; - } - return (0); + } else if (MLX5E_HW2SW_MTU(hw_mtu) < sw_mtu) { + err = -E2BIG, + if_printf(ifp, "Port MTU %d is smaller than " + "ifp mtu %d\n", hw_mtu, sw_mtu); + } else if (MLX5E_HW2SW_MTU(hw_mtu) > sw_mtu) { + err = -EINVAL; + if_printf(ifp, "Port MTU %d is bigger than " + "ifp mtu %d\n", hw_mtu, sw_mtu); + } + ifp->if_mtu = sw_mtu; + return (err); } int |
