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ixgbe: incorrect XDP ring accounting in ethtool tx_frame param 

Changing the TX ring parameters with an XDP program attached may
cause the XDP queues to be cleared and the TX rings to be incorrectly
configured.

Fix by doing correct ring accounting in setup call.

Fixes: 33fdc82f08 ("ixgbe: add support for XDP_TX action")
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
John Fastabend 2017-09-07 10:32:48 -07:00 committed by Jeff Kirsher
parent 5e0fac63a6
commit 8e679021c5
1 changed files with 8 additions and 8 deletions
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16
drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c
View File

@ -1048,7 +1048,7 @@ static int ixgbe_set_ringparam(struct net_device *netdev,
{
struct ixgbe_adapter *adapter = netdev_priv(netdev);
struct ixgbe_ring *temp_ring;
int i, err = 0;
int i, j, err = 0;
u32 new_rx_count, new_tx_count;
if ((ring->rx_mini_pending) || (ring->rx_jumbo_pending))
@ -1085,8 +1085,8 @@ static int ixgbe_set_ringparam(struct net_device *netdev,
}
/* allocate temporary buffer to store rings in */
i = max_t(int, adapter->num_tx_queues, adapter->num_rx_queues);
i = max_t(int, i, adapter->num_xdp_queues);
i = max_t(int, adapter->num_tx_queues + adapter->num_xdp_queues,
adapter->num_rx_queues);
temp_ring = vmalloc(i * sizeof(struct ixgbe_ring));
if (!temp_ring) {
@ -1118,8 +1118,8 @@ static int ixgbe_set_ringparam(struct net_device *netdev,
}
}
for (i = 0; i < adapter->num_xdp_queues; i++) {
memcpy(&temp_ring[i], adapter->xdp_ring[i],
for (j = 0; j < adapter->num_xdp_queues; j++, i++) {
memcpy(&temp_ring[i], adapter->xdp_ring[j],
sizeof(struct ixgbe_ring));
temp_ring[i].count = new_tx_count;
@ -1139,10 +1139,10 @@ static int ixgbe_set_ringparam(struct net_device *netdev,
memcpy(adapter->tx_ring[i], &temp_ring[i],
sizeof(struct ixgbe_ring));
}
for (i = 0; i < adapter->num_xdp_queues; i++) {
ixgbe_free_tx_resources(adapter->xdp_ring[i]);
for (j = 0; j < adapter->num_xdp_queues; j++, i++) {
ixgbe_free_tx_resources(adapter->xdp_ring[j]);
memcpy(adapter->xdp_ring[i], &temp_ring[i],
memcpy(adapter->xdp_ring[j], &temp_ring[i],
sizeof(struct ixgbe_ring));
}