Skip to content

Commit

Permalink
ixgbe: Fix NAPI enable/disable path when using DCB
Browse files Browse the repository at this point in the history 
This change allows DCB mode to change the number of queues, and presumably
the number of NAPI instances, safely.

Signed-off-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
  • Loading branch information
Peter P Waskiewicz Jr authored and David S. Miller committed Dec 26, 2008
1 parent d7b0663 commit 7adf152
Show file tree
Hide file tree
Showing 2 changed files with 10 additions and 5 deletions.
4 changes: 2 additions & 2 deletions drivers/net/ixgbe/ixgbe_dcb_nl.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -148,6 +148,7 @@ static u8 ixgbe_dcbnl_set_state(struct net_device *netdev, u8 state)
netdev->netdev_ops->ndo_stop(netdev);
ixgbe_reset_interrupt_capability(adapter);
ixgbe_napi_del_all(adapter);
INIT_LIST_HEAD(&netdev->napi_list);
kfree(adapter->tx_ring);
kfree(adapter->rx_ring);
adapter->tx_ring = NULL;
Expand All @@ -157,7 +158,6 @@ static u8 ixgbe_dcbnl_set_state(struct net_device *netdev, u8 state)
adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
adapter->flags |= IXGBE_FLAG_DCB_ENABLED;
ixgbe_init_interrupt_scheme(adapter);
ixgbe_napi_add_all(adapter);
if (netif_running(netdev))
netdev->netdev_ops->ndo_open(netdev);
} else {
Expand All @@ -167,6 +167,7 @@ static u8 ixgbe_dcbnl_set_state(struct net_device *netdev, u8 state)
netdev->netdev_ops->ndo_stop(netdev);
ixgbe_reset_interrupt_capability(adapter);
ixgbe_napi_del_all(adapter);
INIT_LIST_HEAD(&netdev->napi_list);
kfree(adapter->tx_ring);
kfree(adapter->rx_ring);
adapter->tx_ring = NULL;
Expand All @@ -176,7 +177,6 @@ static u8 ixgbe_dcbnl_set_state(struct net_device *netdev, u8 state)
adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;
adapter->flags |= IXGBE_FLAG_RSS_ENABLED;
ixgbe_init_interrupt_scheme(adapter);
ixgbe_napi_add_all(adapter);
if (netif_running(netdev))
netdev->netdev_ops->ndo_open(netdev);
}
Expand Down
11 changes: 8 additions & 3 deletions drivers/net/ixgbe/ixgbe_main.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -2064,6 +2064,8 @@ static int ixgbe_up_complete(struct ixgbe_adapter *adapter)
else
ixgbe_configure_msi_and_legacy(adapter);

ixgbe_napi_add_all(adapter);

clear_bit(__IXGBE_DOWN, &adapter->state);
ixgbe_napi_enable_all(adapter);

Expand Down Expand Up @@ -3176,8 +3178,13 @@ static int ixgbe_close(struct net_device *netdev)
void ixgbe_napi_add_all(struct ixgbe_adapter *adapter)
{
int q_idx, q_vectors;
struct net_device *netdev = adapter->netdev;
int (*poll)(struct napi_struct *, int);

/* check if we already have our netdev->napi_list populated */
if (&netdev->napi_list != netdev->napi_list.next)
return;

if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
poll = &ixgbe_clean_rxonly;
/* Only enable as many vectors as we have rx queues. */
Expand Down Expand Up @@ -3271,6 +3278,7 @@ static int ixgbe_suspend(struct pci_dev *pdev, pm_message_t state)
}
ixgbe_reset_interrupt_capability(adapter);
ixgbe_napi_del_all(adapter);
INIT_LIST_HEAD(&netdev->napi_list);
kfree(adapter->tx_ring);
kfree(adapter->rx_ring);

Expand Down Expand Up @@ -4212,8 +4220,6 @@ static int __devinit ixgbe_probe(struct pci_dev *pdev,
netif_carrier_off(netdev);
netif_tx_stop_all_queues(netdev);

ixgbe_napi_add_all(adapter);

strcpy(netdev->name, "eth%d");
err = register_netdev(netdev);
if (err)
Expand Down Expand Up @@ -4299,7 +4305,6 @@ static void __devexit ixgbe_remove(struct pci_dev *pdev)
pci_release_regions(pdev);

DPRINTK(PROBE, INFO, "complete\n");
ixgbe_napi_del_all(adapter);
kfree(adapter->tx_ring);
kfree(adapter->rx_ring);

Expand Down

0 comments on commit 7adf152

Please sign in to comment.