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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>
hifive-unleashed-5.1
Yijing Wang 2013-08-08 21:12:36 +08:00 committed by Joerg Roedel
parent d4e4ab86bc
commit 82fcfc674e
1 changed files with 1 additions and 1 deletions
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2
drivers/iommu/amd_iommu_init.c
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@ -1384,7 +1384,7 @@ static int iommu_init_msi(struct amd_iommu *iommu)
if (iommu->int_enabled)
goto enable_faults;
if (pci_find_capability(iommu->dev, PCI_CAP_ID_MSI))
if (iommu->dev->msi_cap)
ret = iommu_setup_msi(iommu);
else
ret = -ENODEV;