iommu/vt-d: Remove device_to_iommu() call from domain_remove_dev_info()

This was problematic because it works by domain/bus/devfn and we want
to make device_to_iommu() use only a struct device * (for handling non-PCI
devices). Now that the iommu pointer is reliably stored in the
device_domain_info, we don't need to look it up.

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

1 files changed, 3 insertions, 5 deletions

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index dc322d0238a0..aa8548c8a915 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -2084,7 +2084,6 @@ static void domain_remove_dev_info(struct dmar_domain *domain)
 {
         struct device_domain_info *info;
         unsigned long flags, flags2;
-        struct intel_iommu *iommu;
 
         spin_lock_irqsave(&device_domain_lock, flags);
         while (!list_empty(&domain->devices)) {
@@ -2094,16 +2093,15 @@ static void domain_remove_dev_info(struct dmar_domain *domain)
                 spin_unlock_irqrestore(&device_domain_lock, flags);
 
                 iommu_disable_dev_iotlb(info);
-                iommu = device_to_iommu(info->segment, info->bus, info->devfn);
-                iommu_detach_dev(iommu, info->bus, info->devfn);
+                iommu_detach_dev(info->iommu, info->bus, info->devfn);
 
                 if (domain->flags & DOMAIN_FLAG_VIRTUAL_MACHINE) {
-                        iommu_detach_dependent_devices(iommu, info->dev);
+                        iommu_detach_dependent_devices(info->iommu, info->dev);
                         /* clear this iommu in iommu_bmp, update iommu count
                          * and capabilities
                          */
                         spin_lock_irqsave(&domain->iommu_lock, flags2);
-                        if (test_and_clear_bit(iommu->seq_id,
+                        if (test_and_clear_bit(info->iommu->seq_id,
                                                domain->iommu_bmp)) {
                                 domain->iommu_count--;
                                 domain_update_iommu_cap(domain);