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net/mlx5: E-Switch, Handle mode change failures 

E-switch mode changes involve creating HW tables, potentially allocating
netdevices, etc, and things can fail. Add an attempt to rollback to the
existing mode when changing to the new mode fails. Only if rollback fails,
getting proper SRIOV functionality requires module unload or sriov
disablement/enablement.

Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Or Gerlitz 2016-09-18 18:20:29 +03:00 committed by David S. Miller
parent 4eea37d7b9
commit 6c419ba8e2
1 changed files with 14 additions and 6 deletions
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20
drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
View File

@ -446,7 +446,7 @@ out:
static int esw_offloads_start(struct mlx5_eswitch *esw)
{
int err, num_vfs = esw->dev->priv.sriov.num_vfs;
int err, err1, num_vfs = esw->dev->priv.sriov.num_vfs;
if (esw->mode != SRIOV_LEGACY) {
esw_warn(esw->dev, "Can't set offloads mode, SRIOV legacy not enabled\n");
@ -455,8 +455,12 @@ static int esw_offloads_start(struct mlx5_eswitch *esw)
mlx5_eswitch_disable_sriov(esw);
err = mlx5_eswitch_enable_sriov(esw, num_vfs, SRIOV_OFFLOADS);
if (err)
esw_warn(esw->dev, "Failed set eswitch to offloads, err %d\n", err);
if (err) {
esw_warn(esw->dev, "Failed setting eswitch to offloads, err %d\n", err);
err1 = mlx5_eswitch_enable_sriov(esw, num_vfs, SRIOV_LEGACY);
if (err1)
esw_warn(esw->dev, "Failed setting eswitch back to legacy, err %d\n", err);
}
return err;
}
@ -508,12 +512,16 @@ create_ft_err:
static int esw_offloads_stop(struct mlx5_eswitch *esw)
{
int err, num_vfs = esw->dev->priv.sriov.num_vfs;
int err, err1, num_vfs = esw->dev->priv.sriov.num_vfs;
mlx5_eswitch_disable_sriov(esw);
err = mlx5_eswitch_enable_sriov(esw, num_vfs, SRIOV_LEGACY);
if (err)
esw_warn(esw->dev, "Failed set eswitch legacy mode. err %d\n", err);
if (err) {
esw_warn(esw->dev, "Failed setting eswitch to legacy, err %d\n", err);
err1 = mlx5_eswitch_enable_sriov(esw, num_vfs, SRIOV_OFFLOADS);
if (err1)
esw_warn(esw->dev, "Failed setting eswitch back to offloads, err %d\n", err);
}
return err;
}