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authorAlexander Duyck <alexander.h.duyck@intel.com>2009-06-04 15:59:49 (GMT)
committerDavid S. Miller <davem@davemloft.net>2009-06-07 12:20:20 (GMT)
commit21fa4e66bd0bedfa4ed6aa6f7008b2aff6d45c8d (patch)
treea0a828616b4645b5843b62de87321857096ae7a5
parent74766013a131f1e1c2fe8fd138e12841eb708060 (diff)
downloadlinux-21fa4e66bd0bedfa4ed6aa6f7008b2aff6d45c8d.tar.xz
ixgbe: use rx_buffer_info->dma instead of nr_frags to determine skb unmap
This patch changes the driver so that it uses rx_buffer_info->dma to determine if it needs to unmap the page instead of sh_info->nr_frags. This helps to prevent a cache line miss when receiving small packets as the rx_buffer_info data should already be in the cache. Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/net/ixgbe/ixgbe_main.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c
index 9684632..e1efa1d 100644
--- a/drivers/net/ixgbe/ixgbe_main.c
+++ b/drivers/net/ixgbe/ixgbe_main.c
@@ -708,7 +708,7 @@ static bool ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector,
prefetch(skb->data - NET_IP_ALIGN);
rx_buffer_info->skb = NULL;
- if (len && !skb_shinfo(skb)->nr_frags) {
+ if (rx_buffer_info->dma) {
pci_unmap_single(pdev, rx_buffer_info->dma,
rx_ring->rx_buf_len,
PCI_DMA_FROMDEVICE);