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PCI/VFIO: use pcie_flags_reg instead of access PCI-E Capabilities Register
Currently, we use pcie_flags_reg to cache PCI-E Capabilities Register, because PCI-E Capabilities Register bits are almost read-only. This patch use pcie_caps_reg() instead of another access PCI-E Capabilities Register. Signed-off-by: Yijing Wang <wangyijing@huawei.com> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
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1 changed files with 1 additions and 5 deletions
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@ -1037,13 +1037,9 @@ static int vfio_cap_len(struct vfio_pci_device *vdev, u8 cap, u8 pos)
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return byte;
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return byte;
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case PCI_CAP_ID_EXP:
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case PCI_CAP_ID_EXP:
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/* length based on version */
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/* length based on version */
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ret = pci_read_config_word(pdev, pos + PCI_EXP_FLAGS, &word);
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if (ret)
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return pcibios_err_to_errno(ret);
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vdev->extended_caps = true;
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vdev->extended_caps = true;
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if ((word & PCI_EXP_FLAGS_VERS) == 1)
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if ((pcie_caps_reg(pdev) & PCI_EXP_FLAGS_VERS) == 1)
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return PCI_CAP_EXP_ENDPOINT_SIZEOF_V1;
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return PCI_CAP_EXP_ENDPOINT_SIZEOF_V1;
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else
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else
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return PCI_CAP_EXP_ENDPOINT_SIZEOF_V2;
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return PCI_CAP_EXP_ENDPOINT_SIZEOF_V2;
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