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[NET]: Make ->poll() breakout consistent in Intel ethernet drivers. 

This makes the ->poll() routines of the E100, E1000, E1000E, IXGB, and
IXGBE drivers complete ->poll() consistently.

Now they will all break out when the amount of RX work done is less
than 'budget'.

At a later time, we may want put back code to include the TX work as
well (as at least one other NAPI driver does, but by in large NAPI
drivers do not do this).  But if so, it should be done consistently
across the board to all of these drivers.

Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Auke Kok <auke-jan.h.kok@intel.com>
This commit is contained in:
David S. Miller 2008-01-07 21:06:12 -08:00
parent fed17f3094
commit 53e52c729c
5 changed files with 19 additions and 21 deletions
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7
drivers/net/e100.c
View File

@ -1991,13 +1991,12 @@ static int e100_poll(struct napi_struct *napi, int budget)
struct nic *nic = container_of(napi, struct nic, napi);
struct net_device *netdev = nic->netdev;
unsigned int work_done = 0;
int tx_cleaned;
e100_rx_clean(nic, &work_done, budget);
tx_cleaned = e100_tx_clean(nic);
e100_tx_clean(nic);
/* If no Rx and Tx cleanup work was done, exit polling mode. */
if((!tx_cleaned && (work_done == 0))) {
/* If budget not fully consumed, exit the polling mode */
if (work_done < budget) {
netif_rx_complete(netdev, napi);
e100_enable_irq(nic);
}

10
drivers/net/e1000/e1000_main.c
View File

@ -3919,7 +3919,7 @@ e1000_clean(struct napi_struct *napi, int budget)
{
struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter, napi);
struct net_device *poll_dev = adapter->netdev;
int tx_cleaned = 0, work_done = 0;
int work_done = 0;
/* Must NOT use netdev_priv macro here. */
adapter = poll_dev->priv;
@ -3929,16 +3929,16 @@ e1000_clean(struct napi_struct *napi, int budget)
* simultaneously. A failure obtaining the lock means
* tx_ring[0] is currently being cleaned anyway. */
if (spin_trylock(&adapter->tx_queue_lock)) {
tx_cleaned = e1000_clean_tx_irq(adapter,
&adapter->tx_ring[0]);
e1000_clean_tx_irq(adapter,
&adapter->tx_ring[0]);
spin_unlock(&adapter->tx_queue_lock);
}
adapter->clean_rx(adapter, &adapter->rx_ring[0],
&work_done, budget);
/* If no Tx and not enough Rx work done, exit the polling mode */
if ((!tx_cleaned && (work_done == 0))) {
/* If budget not fully consumed, exit the polling mode */
if (work_done < budget) {
if (likely(adapter->itr_setting & 3))
e1000_set_itr(adapter);
netif_rx_complete(poll_dev, napi);

8
drivers/net/e1000e/netdev.c
View File

@ -1384,7 +1384,7 @@ static int e1000_clean(struct napi_struct *napi, int budget)
{
struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter, napi);
struct net_device *poll_dev = adapter->netdev;
int tx_cleaned = 0, work_done = 0;
int work_done = 0;
/* Must NOT use netdev_priv macro here. */
adapter = poll_dev->priv;
@ -1394,14 +1394,14 @@ static int e1000_clean(struct napi_struct *napi, int budget)
* simultaneously. A failure obtaining the lock means
* tx_ring is currently being cleaned anyway. */
if (spin_trylock(&adapter->tx_queue_lock)) {
tx_cleaned = e1000_clean_tx_irq(adapter);
e1000_clean_tx_irq(adapter);
spin_unlock(&adapter->tx_queue_lock);
}
adapter->clean_rx(adapter, &work_done, budget);
/* If no Tx and not enough Rx work done, exit the polling mode */
if ((!tx_cleaned && (work_done < budget))) {
/* If budget not fully consumed, exit the polling mode */
if (work_done < budget) {
if (adapter->itr_setting & 3)
e1000_set_itr(adapter);
netif_rx_complete(poll_dev, napi);

7
drivers/net/ixgb/ixgb_main.c
View File

@ -1787,14 +1787,13 @@ ixgb_clean(struct napi_struct *napi, int budget)
{
struct ixgb_adapter *adapter = container_of(napi, struct ixgb_adapter, napi);
struct net_device *netdev = adapter->netdev;
int tx_cleaned;
int work_done = 0;
tx_cleaned = ixgb_clean_tx_irq(adapter);
ixgb_clean_tx_irq(adapter);
ixgb_clean_rx_irq(adapter, &work_done, budget);
/* if no Tx and not enough Rx work done, exit the polling mode */
if((!tx_cleaned && (work_done == 0))) {
/* If budget not fully consumed, exit the polling mode */
if (work_done < budget) {
netif_rx_complete(netdev, napi);
ixgb_irq_enable(adapter);
}

8
drivers/net/ixgbe/ixgbe_main.c
View File

@ -1468,15 +1468,15 @@ static int ixgbe_clean(struct napi_struct *napi, int budget)
struct ixgbe_adapter *adapter = container_of(napi,
struct ixgbe_adapter, napi);
struct net_device *netdev = adapter->netdev;
int tx_cleaned = 0, work_done = 0;
int work_done = 0;
/* In non-MSIX case, there is no multi-Tx/Rx queue */
tx_cleaned = ixgbe_clean_tx_irq(adapter, adapter->tx_ring);
ixgbe_clean_tx_irq(adapter, adapter->tx_ring);
ixgbe_clean_rx_irq(adapter, &adapter->rx_ring[0], &work_done,
budget);
/* If no Tx and not enough Rx work done, exit the polling mode */
if ((!tx_cleaned && (work_done < budget))) {
/* If budget not fully consumed, exit the polling mode */
if (work_done < budget) {
netif_rx_complete(netdev, napi);
ixgbe_irq_enable(adapter);
}