iommu/vt-d: Avoid duplicate device_domain_info structures
When a 'struct device_domain_info' is created as an alias
for another device, this struct will not be re-used when the
real device is encountered. Fix that to avoid duplicate
device_domain_info structures being added.
Signed-off-by: Joerg Roedel <jroedel@suse.de>
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 6e61b3e..8834765 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -2270,12 +2270,16 @@
spin_lock_irqsave(&device_domain_lock, flags);
if (dev)
found = find_domain(dev);
- else {
+
+ if (!found) {
struct device_domain_info *info2;
info2 = dmar_search_domain_by_dev_info(iommu->segment, bus, devfn);
- if (info2)
- found = info2->domain;
+ if (info2) {
+ found = info2->domain;
+ info2->dev = dev;
+ }
}
+
if (found) {
spin_unlock_irqrestore(&device_domain_lock, flags);
free_devinfo_mem(info);