iommu/vt-d: Detach domain when move device out of group

When removing a device from an iommu group, the domain should
be detached from the device. Otherwise, the stale domain info
will still be cached by the driver and the driver will refuse
to attach any domain to the device again.

Cc: Ashok Raj <ashok.raj@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Kevin Tian <kevin.tian@intel.com>
Fixes: b7297783c2bb6 ("iommu/vt-d: Remove duplicated code for device hotplug")
Reported-and-tested-by: Vlad Buslov <vladbu@mellanox.com>
Suggested-by: Robin Murphy <robin.murphy@arm.com>
Link: https://lkml.org/lkml/2019/7/26/1133
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index bdaed2d..3e22fa6 100644 (file)
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -5316,6 +5316,8 @@ static void intel_iommu_remove_device(struct device *dev)
        if (!iommu)
                return;
 
+       dmar_remove_one_dev_info(dev);
+
        iommu_group_remove_device(dev);
 
        iommu_device_unlink(&iommu->iommu, dev);