From f303e50766298feac17c8715e29ecd14b2c12680 Mon Sep 17 00:00:00 2001 From: Joerg Roedel Date: Thu, 23 Jul 2015 18:37:13 +0200 Subject: [PATCH] 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 --- drivers/iommu/intel-iommu.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 6e61b3eb47e8..8834765e90c6 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -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); -- 2.39.5