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iommu/vt-d: Avoid duplicate device_domain_info structures

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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>
This commit is contained in:
Joerg Roedel 2015-07-23 18:37:13 +02:00
parent 08a7f456a7
commit f303e50766
1 changed files with 7 additions and 3 deletions
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10
drivers/iommu/intel-iommu.c
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@ -2270,12 +2270,16 @@ static struct dmar_domain *dmar_insert_one_dev_info(struct intel_iommu *iommu,
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);