diff options
| author | David Woodhouse <dwmw2@infradead.org> | 2012-05-25 17:42:54 +0100 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2012-05-31 00:44:03 +0100 |
| commit | d655fe1e7e79ee5012d83bf66a9e524aa55ec7de (patch) | |
| tree | fbd715738a1b10067dc78a17d771f60e88a5a880 /drivers | |
| parent | 10c9eea8f9831180c52bfbb0ddf9af6e51989a41 (diff) | |
intel-iommu: Add device info into list before doing context mapping
commit e2ad23d04c1304431ab5176c89b7b476ded2d995 upstream.
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>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/iommu/intel-iommu.c | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index bdc447fd476..ccf347f12c8 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -2267,12 +2267,6 @@ 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; @@ -2285,6 +2279,17 @@ 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; } |