iommu/amd: Detach device from domain before removal

Detach the device that is about to be removed from its
domain (if it has one) to clear any related state like DTE
entry and device's ATS state.

Reported-by: Kelly Zytaruk <Kelly.Zytaruk@amd.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index e5e223938eecc9f013e33977b1de50bbb3cfae3d..374c129219ef0c48c8ff3004662c413d78ad2b4c 100644 (file)
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -114,6 +114,7 @@ struct kmem_cache *amd_iommu_irq_cache;
 
 static void update_domain(struct protection_domain *domain);
 static int protection_domain_init(struct protection_domain *domain);
+static void detach_device(struct device *dev);
 
 /*
  * For dynamic growth the aperture size is split into ranges of 128MB of
@@ -384,6 +385,9 @@ static void iommu_uninit_device(struct device *dev)
        if (!dev_data)
                return;
 
+       if (dev_data->domain)
+               detach_device(dev);
+
        iommu_device_unlink(amd_iommu_rlookup_table[dev_data->devid]->iommu_dev,
                            dev);