This patch add device info into list before do context mapping. Because device info will be used by iommu_enable_dev_iotlb function, in this function, pci_enable_ats would not be called without this patch, so ATS did not enable while a PCI device which has ATS capability is assigned to a guest.
Signed-off-by: Xudong Hao <xudong.hao@xxxxxxxxx>
Signed-off-by: Xiantao Zhang <xiantao.zhang@xxxxxxxxx>
---
drivers/iommu/intel-iommu.c | 14 ++++++++------
1 files changed, 8 insertions(+), 6 deletions(-)
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index c0c7820..f0b5d38 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -2264,12 +2264,6 @@ static int domain_add_dev_info(struct dmar_domain *domain,
if (!info)
return -ENOMEM;
- ret = domain_context_mapping(domain, pdev, translation);
- if (ret) {
- free_devinfo_mem(info);
- return ret;
- }
-
info->segment = pci_domain_nr(pdev->bus);
info->bus = pdev->bus->number;
info->devfn = pdev->devfn;
@@ -2282,6 +2276,14 @@ static int domain_add_dev_info(struct dmar_domain *domain,
pdev->dev.archdata.iommu = info;
spin_unlock_irqrestore(&device_domain_lock, flags);
+ ret = domain_context_mapping(domain, pdev, translation);
+ if (ret) {
+ list_del(&info->link);
+ list_del(&info->global);
+ free_devinfo_mem(info);
+ return ret;
+ }
+
return 0;
}
--
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