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net/mlx4_core: Don't give VFs MAC addresses which are derived from the PF MAC

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If the user has not assigned a MAC address to a VM, then don't give it MAC which
is based on the PF one. The current derivation scheme is wrong and leads to VM
MAC collisions when the number of cards/hypervisors becomes big enough.

Instead, just give it zeros and let them figure out what to do with that.

Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Or Gerlitz 2013-08-01 19:55:00 +03:00 committed by David S. Miller
parent 8a226b2cfa
commit 0508ad6468
1 changed files with 1 additions and 10 deletions
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11
drivers/net/ethernet/mellanox/mlx4/fw.c
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@ -845,16 +845,7 @@ int mlx4_QUERY_PORT_wrapper(struct mlx4_dev *dev, int slave,
MLX4_CMD_NATIVE);
if (!err && dev->caps.function != slave) {
/* if config MAC in DB use it */
if (priv->mfunc.master.vf_oper[slave].vport[vhcr->in_modifier].state.mac)
def_mac = priv->mfunc.master.vf_oper[slave].vport[vhcr->in_modifier].state.mac;
else {
/* set slave default_mac address */
MLX4_GET(def_mac, outbox->buf, QUERY_PORT_MAC_OFFSET);
def_mac += slave << 8;
priv->mfunc.master.vf_admin[slave].vport[vhcr->in_modifier].mac = def_mac;
}
def_mac = priv->mfunc.master.vf_oper[slave].vport[vhcr->in_modifier].state.mac;
MLX4_PUT(outbox->buf, def_mac, QUERY_PORT_MAC_OFFSET);
/* get port type - currently only eth is enabled */