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iommu/amd: Clean up unnecessary MSI/MSI-X capability find
PCI core will initialize device MSI/MSI-X capability in pci_msi_init_pci_dev(). So device driver should use pci_dev->msi_cap/msix_cap to determine whether the device support MSI/MSI-X instead of using pci_find_capability(pci_dev, PCI_CAP_ID_MSI/MSIX). Access to PCIe device config space again will consume more time. Signed-off-by: Yijing Wang <wangyijing@huawei.com> Cc: Joerg Roedel <joro@8bytes.org> Cc: iommu@lists.linux-foundation.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Joerg Roedel <joro@8bytes.org>
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1 changed files with 1 additions and 1 deletions
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@ -1384,7 +1384,7 @@ static int iommu_init_msi(struct amd_iommu *iommu)
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if (iommu->int_enabled)
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if (iommu->int_enabled)
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goto enable_faults;
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goto enable_faults;
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if (pci_find_capability(iommu->dev, PCI_CAP_ID_MSI))
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if (iommu->dev->msi_cap)
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ret = iommu_setup_msi(iommu);
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ret = iommu_setup_msi(iommu);
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else
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else
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ret = -ENODEV;
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ret = -ENODEV;
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