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net/mlx4_en: set correct MTU in SRIOV

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When setting MTU in SRIOV mode add ETH, VLAN and FCS header length
to the maximum MTU obtained from QUERY_DEV_CAP.

Signed-off-by: Eugenia Emantayev <eugenia@mellanox.com>
Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.com>
Signed-off-by: Amir Vadai <amirv@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eugenia Emantayev 2013-04-11 01:56:42 +00:00 committed by David S. Miller
parent fab1e24ab8
commit c59fec207b
1 changed files with 3 additions and 1 deletions
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4
drivers/net/ethernet/mellanox/mlx4/port.c
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@ -32,6 +32,7 @@
#include <linux/errno.h>
#include <linux/if_ether.h>
#include <linux/if_vlan.h>
#include <linux/export.h>
#include <linux/mlx4/cmd.h>
@ -517,7 +518,8 @@ static int mlx4_common_set_port(struct mlx4_dev *dev, int slave, u32 in_mod,
/* Mtu is configured as the max MTU among all the
* the functions on the port. */
mtu = be16_to_cpu(gen_context->mtu);
mtu = min_t(int, mtu, dev->caps.eth_mtu_cap[port]);
mtu = min_t(int, mtu, dev->caps.eth_mtu_cap[port] +
ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN);
prev_mtu = slave_st->mtu[port];
slave_st->mtu[port] = mtu;
if (mtu > master->max_mtu[port])