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intel-iommu: Add device info into list before doing context mapping 

Add device info into list before doing context mapping, because device
info will be used by iommu_enable_dev_iotlb(). Without it, ATS won't get
enabled as it should be.

ATS, while a dubious decision from a security point of view, can be very
important for performance.

Signed-off-by: Xudong Hao <xudong.hao@intel.com>
Signed-off-by: Xiantao Zhang <xiantao.zhang@intel.com>
Acked-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
David Woodhouse 2012-05-25 17:42:54 +01:00 committed by Linus Torvalds
parent da89fb165e
commit e2ad23d04c
1 changed files with 11 additions and 6 deletions
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17
drivers/iommu/intel-iommu.c
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@ -2287,12 +2287,6 @@ 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;
@ -2305,6 +2299,17 @@ 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) {
spin_lock_irqsave(&device_domain_lock, flags);
list_del(&info->link);
list_del(&info->global);
pdev->dev.archdata.iommu = NULL;
spin_unlock_irqrestore(&device_domain_lock, flags);
free_devinfo_mem(info);
return ret;
}
return 0;
}