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>
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1 changed files with 5 additions and 8 deletions
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@ -753,12 +753,11 @@ static void __vxge_hw_device_host_info_get(struct __vxge_hw_device *hldev)
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static enum vxge_hw_status
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__vxge_hw_verify_pci_e_info(struct __vxge_hw_device *hldev)
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{
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int exp_cap;
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struct pci_dev *dev = hldev->pdev;
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u16 lnk;
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/* Get the negotiated link width and speed from PCI config space */
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exp_cap = pci_find_capability(hldev->pdev, PCI_CAP_ID_EXP);
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pci_read_config_word(hldev->pdev, exp_cap + PCI_EXP_LNKSTA, &lnk);
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pci_read_config_word(dev, dev->pcie_cap + PCI_EXP_LNKSTA, &lnk);
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if ((lnk & PCI_EXP_LNKSTA_CLS) != 1)
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return VXGE_HW_ERR_INVALID_PCI_INFO;
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@ -1982,13 +1981,11 @@ exit:
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u16 vxge_hw_device_link_width_get(struct __vxge_hw_device *hldev)
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{
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int link_width, exp_cap;
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struct pci_dev *dev = hldev->pdev;
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u16 lnk;
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exp_cap = pci_find_capability(hldev->pdev, PCI_CAP_ID_EXP);
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pci_read_config_word(hldev->pdev, exp_cap + PCI_EXP_LNKSTA, &lnk);
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link_width = (lnk & VXGE_HW_PCI_EXP_LNKCAP_LNK_WIDTH) >> 4;
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return link_width;
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pci_read_config_word(dev, dev->pcie_cap + PCI_EXP_LNKSTA, &lnk);
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return (lnk & VXGE_HW_PCI_EXP_LNKCAP_LNK_WIDTH) >> 4;
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}
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/*
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