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[PATCH] ixgb: Code optimization 

Code optimization

Signed-off-by: Mallikarjuna R Chilakala <mallikarjuna.chilakala@intel.com>
Signed-off-by: Ganesh Venkatesan <ganesh.venkatesan@intel.com>
Signed-off-by: John Ronciak <john.ronciak@intel.com>

diff -up net-drivers-2.6/drivers/net/ixgb/ixgb_main.c net-drivers-2.6/drivers/net/ixgb.new/ixgb_main.c
This commit is contained in:
Malli Chilakala 2005-04-28 19:04:54 -07:00 committed by Jeff Garzik
parent c2eba932b1
commit f404de1cd4
1 changed files with 12 additions and 16 deletions
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28
drivers/net/ixgb/ixgb_main.c
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@ -1822,7 +1822,6 @@ ixgb_clean_rx_irq(struct ixgb_adapter *adapter)
struct pci_dev *pdev = adapter->pdev;
struct ixgb_rx_desc *rx_desc, *next_rxd;
struct ixgb_buffer *buffer_info, *next_buffer, *next2_buffer;
struct sk_buff *skb, *next_skb;
uint32_t length;
unsigned int i, j;
boolean_t cleaned = FALSE;
@ -1832,6 +1831,8 @@ ixgb_clean_rx_irq(struct ixgb_adapter *adapter)
buffer_info = &rx_ring->buffer_info[i];
while(rx_desc->status & IXGB_RX_DESC_STATUS_DD) {
struct sk_buff *skb, *next_skb;
u8 status;
#ifdef CONFIG_IXGB_NAPI
if(*work_done >= work_to_do)
@ -1839,7 +1840,9 @@ ixgb_clean_rx_irq(struct ixgb_adapter *adapter)
(*work_done)++;
#endif
status = rx_desc->status;
skb = buffer_info->skb;
prefetch(skb->data);
if(++i == rx_ring->count) i = 0;
@ -1864,7 +1867,7 @@ ixgb_clean_rx_irq(struct ixgb_adapter *adapter)
length = le16_to_cpu(rx_desc->length);
if(unlikely(!(rx_desc->status & IXGB_RX_DESC_STATUS_EOP))) {
if(unlikely(!(status & IXGB_RX_DESC_STATUS_EOP))) {
/* All receives must fit into a single buffer */
@ -1872,12 +1875,7 @@ ixgb_clean_rx_irq(struct ixgb_adapter *adapter)
"length<%x>\n", length);
dev_kfree_skb_irq(skb);
rx_desc->status = 0;
buffer_info->skb = NULL;
rx_desc = next_rxd;
buffer_info = next_buffer;
continue;
goto rxdesc_done;
}
if (unlikely(rx_desc->errors
@ -1886,12 +1884,7 @@ ixgb_clean_rx_irq(struct ixgb_adapter *adapter)
IXGB_RX_DESC_ERRORS_RXE))) {
dev_kfree_skb_irq(skb);
rx_desc->status = 0;
buffer_info->skb = NULL;
rx_desc = next_rxd;
buffer_info = next_buffer;
continue;
goto rxdesc_done;
}
/* Good Receive */
@ -1902,7 +1895,7 @@ ixgb_clean_rx_irq(struct ixgb_adapter *adapter)
skb->protocol = eth_type_trans(skb, netdev);
#ifdef CONFIG_IXGB_NAPI
if(adapter->vlgrp && (rx_desc->status & IXGB_RX_DESC_STATUS_VP)) {
if(adapter->vlgrp && (status & IXGB_RX_DESC_STATUS_VP)) {
vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
le16_to_cpu(rx_desc->special) &
IXGB_RX_DESC_SPECIAL_VLAN_MASK);
@ -1910,7 +1903,7 @@ ixgb_clean_rx_irq(struct ixgb_adapter *adapter)
netif_receive_skb(skb);
}
#else /* CONFIG_IXGB_NAPI */
if(adapter->vlgrp && (rx_desc->status & IXGB_RX_DESC_STATUS_VP)) {
if(adapter->vlgrp && (status & IXGB_RX_DESC_STATUS_VP)) {
vlan_hwaccel_rx(skb, adapter->vlgrp,
le16_to_cpu(rx_desc->special) &
IXGB_RX_DESC_SPECIAL_VLAN_MASK);
@ -1920,9 +1913,12 @@ ixgb_clean_rx_irq(struct ixgb_adapter *adapter)
#endif /* CONFIG_IXGB_NAPI */
netdev->last_rx = jiffies;
rxdesc_done:
/* clean up descriptor, might be written over by hw */
rx_desc->status = 0;
buffer_info->skb = NULL;
/* use prefetched values */
rx_desc = next_rxd;
buffer_info = next_buffer;
}