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authorDavid Woodhouse <dwmw2@infradead.org>2012-05-25 17:42:54 +0100
committerLinus Torvalds <torvalds@linux-foundation.org>2012-05-25 15:50:29 -0700
commite2ad23d04c1304431ab5176c89b7b476ded2d995 (patch)
treeb9fbe128486b9e2ea20832f0b2273b4c26b78fa1 /drivers/iommu
parentda89fb165e5e51a2ec1ff8a0ff6bc052d1068184 (diff)
downloadop-kernel-dev-e2ad23d04c1304431ab5176c89b7b476ded2d995.zip
op-kernel-dev-e2ad23d04c1304431ab5176c89b7b476ded2d995.tar.gz
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>
Diffstat (limited to 'drivers/iommu')
-rw-r--r--drivers/iommu/intel-iommu.c17
1 files changed, 11 insertions, 6 deletions
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index bf2fbaa..abab245 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -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;
}
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