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authorJon Mason <jdmason@kudzu.us>2011-06-27 07:48:11 +0000
committerDavid S. Miller <davem@davemloft.net>2011-06-27 21:40:45 -0700
commit95cab7386bef62f8c7535d4726573ce230778e7b (patch)
tree03a254db0dd99fe673aa6757006b9fcc0bdff73a /drivers/net/vxge
parent1a10ccae9003826cee6f2c625fa4caf51cfc0f40 (diff)
vxge: remove unnecessary reads of PCI_CAP_ID_EXP
The PCIE capability offset is saved during PCI bus walking. It will remove an unnecessary search in the PCI configuration space if this value is referenced instead of reacquiring it. Signed-off-by: Jon Mason <jdmason@kudzu.us> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/vxge')
-rw-r--r--drivers/net/vxge/vxge-config.c13
1 files changed, 5 insertions, 8 deletions
diff --git a/drivers/net/vxge/vxge-config.c b/drivers/net/vxge/vxge-config.c
index 857618afa147..1520c574cb20 100644
--- a/drivers/net/vxge/vxge-config.c
+++ b/drivers/net/vxge/vxge-config.c
@@ -753,12 +753,11 @@ static void __vxge_hw_device_host_info_get(struct __vxge_hw_device *hldev)
static enum vxge_hw_status
__vxge_hw_verify_pci_e_info(struct __vxge_hw_device *hldev)
{
- int exp_cap;
+ struct pci_dev *dev = hldev->pdev;
u16 lnk;
/* Get the negotiated link width and speed from PCI config space */
- exp_cap = pci_find_capability(hldev->pdev, PCI_CAP_ID_EXP);
- pci_read_config_word(hldev->pdev, exp_cap + PCI_EXP_LNKSTA, &lnk);
+ pci_read_config_word(dev, dev->pcie_cap + PCI_EXP_LNKSTA, &lnk);
if ((lnk & PCI_EXP_LNKSTA_CLS) != 1)
return VXGE_HW_ERR_INVALID_PCI_INFO;
@@ -1982,13 +1981,11 @@ exit:
u16 vxge_hw_device_link_width_get(struct __vxge_hw_device *hldev)
{
- int link_width, exp_cap;
+ struct pci_dev *dev = hldev->pdev;
u16 lnk;
- exp_cap = pci_find_capability(hldev->pdev, PCI_CAP_ID_EXP);
- pci_read_config_word(hldev->pdev, exp_cap + PCI_EXP_LNKSTA, &lnk);
- link_width = (lnk & VXGE_HW_PCI_EXP_LNKCAP_LNK_WIDTH) >> 4;
- return link_width;
+ pci_read_config_word(dev, dev->pcie_cap + PCI_EXP_LNKSTA, &lnk);
+ return (lnk & VXGE_HW_PCI_EXP_LNKCAP_LNK_WIDTH) >> 4;
}
/*