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authorYijing Wang <wangyijing@huawei.com>2013-08-08 21:12:36 +0800
committerJoerg Roedel <joro@8bytes.org>2013-08-14 12:18:52 +0200
commit82fcfc674ebe2a0d83a6dd1b6ffa5589a94e4d4c (patch)
tree69b59ec451e7ee695af4f592d296d5e23976bf7c /drivers/iommu
parentd4e4ab86bcba5a72779c43dc1459f71fea3d89c8 (diff)
downloadop-kernel-dev-82fcfc674ebe2a0d83a6dd1b6ffa5589a94e4d4c.zip
op-kernel-dev-82fcfc674ebe2a0d83a6dd1b6ffa5589a94e4d4c.tar.gz
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>
Diffstat (limited to 'drivers/iommu')
-rw-r--r--drivers/iommu/amd_iommu_init.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c
index 7acbf35..8f798be 100644
--- a/drivers/iommu/amd_iommu_init.c
+++ b/drivers/iommu/amd_iommu_init.c
@@ -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;
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