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Merge branch 'ethtool-set-channels-fix'

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Tariq Toukan says:

====================
ethtool fix

This patchset from Eran contains a fix to ethtool set_channels, where the call
to get_channels with an uninitialized parameter might result in garbage fields.
It also contains two followup changes in our mlx4/mlx5 Eth drivers.

Series generated against net commit:
0faa9cb5b3 net sched actions: fix refcnt when GETing of action after bind
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2017-01-18 14:58:24 -05:00
commit 6acbe37160
3 changed files with 2 additions and 17 deletions
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7
drivers/net/ethernet/mellanox/mlx4/en_ethtool.c
View file

@ -1732,8 +1732,6 @@ static void mlx4_en_get_channels(struct net_device *dev,
{ {
struct mlx4_en_priv *priv = netdev_priv(dev); struct mlx4_en_priv *priv = netdev_priv(dev);
memset(channel, 0, sizeof(*channel));
channel->max_rx = MAX_RX_RINGS; channel->max_rx = MAX_RX_RINGS;
channel->max_tx = MLX4_EN_MAX_TX_RING_P_UP; channel->max_tx = MLX4_EN_MAX_TX_RING_P_UP;
@ -1752,10 +1750,7 @@ static int mlx4_en_set_channels(struct net_device *dev,
int xdp_count; int xdp_count;
int err = 0; int err = 0;
if (channel->other_count || channel->combined_count || if (!channel->tx_count || !channel->rx_count)
channel->tx_count > MLX4_EN_MAX_TX_RING_P_UP ||
channel->rx_count > MAX_RX_RINGS ||
!channel->tx_count || !channel->rx_count)
return -EINVAL; return -EINVAL;
tmp = kzalloc(sizeof(*tmp), GFP_KERNEL); tmp = kzalloc(sizeof(*tmp), GFP_KERNEL);

10
drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
View file

@ -554,16 +554,6 @@ static int mlx5e_set_channels(struct net_device *dev,
__func__); __func__);
return -EINVAL; return -EINVAL;
} }
if (ch->rx_count || ch->tx_count) {
netdev_info(dev, "%s: separate rx/tx count not supported\n",
__func__);
return -EINVAL;
}
if (count > ncv) {
netdev_info(dev, "%s: count (%d) > max (%d)\n",
__func__, count, ncv);
return -EINVAL;
}
if (priv->params.num_channels == count) if (priv->params.num_channels == count)
return 0; return 0;

2
net/core/ethtool.c
View file

@ -1712,7 +1712,7 @@ static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
static noinline_for_stack int ethtool_set_channels(struct net_device *dev, static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
void __user *useraddr) void __user *useraddr)
{ {
struct ethtool_channels channels, max; struct ethtool_channels channels, max = { .cmd = ETHTOOL_GCHANNELS };
u32 max_rx_in_use = 0; u32 max_rx_in_use = 0;
if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels) if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels)