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net/mlx4_en: Disbale GRO for incoming loopback/selftest packets 

Packets which are sent from the selftest (ethtool) flow,
should not be passed to GRO stack but rather dropped by
the driver after validation. To achieve that, we disable
GRO for the duration of the selftest.

Fixes: dd65beac48 ("net/mlx4_en: Extend usage of napi_gro_frags")
Reported-by: Carol Soto <clsoto@linux.vnet.ibm.com>
Signed-off-by: Ido Shamay <idos@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ido Shamay 2015-03-02 18:22:16 +02:00 committed by David S. Miller
parent f5956fafb0
commit 1037ebbbd2
1 changed files with 7 additions and 1 deletions
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8
drivers/net/ethernet/mellanox/mlx4/en_selftest.c
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@ -81,12 +81,14 @@ static int mlx4_en_test_loopback(struct mlx4_en_priv *priv)
{
u32 loopback_ok = 0;
int i;
bool gro_enabled;
priv->loopback_ok = 0;
priv->validate_loopback = 1;
gro_enabled = priv->dev->features & NETIF_F_GRO;
mlx4_en_update_loopback_state(priv->dev, priv->dev->features);
priv->dev->features &= ~NETIF_F_GRO;
/* xmit */
if (mlx4_en_test_loopback_xmit(priv)) {
@ -108,6 +110,10 @@ static int mlx4_en_test_loopback(struct mlx4_en_priv *priv)
mlx4_en_test_loopback_exit:
priv->validate_loopback = 0;
if (gro_enabled)
priv->dev->features |= NETIF_F_GRO;
mlx4_en_update_loopback_state(priv->dev, priv->dev->features);
return !loopback_ok;
}