Release associated invalidation queue when destroying IOMMU unit
to avoid memory leak.

Signed-off-by: Jiang Liu <jiang....@linux.intel.com>
---
 drivers/iommu/dmar.c |    6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c
index 812b596..a9d9d0f 100644
--- a/drivers/iommu/dmar.c
+++ b/drivers/iommu/dmar.c
@@ -745,6 +745,12 @@ static void free_iommu(struct intel_iommu *iommu)
                destroy_irq(iommu->irq);
        }
 
+       if (iommu->qi) {
+               free_page((unsigned long)iommu->qi->desc);
+               kfree(iommu->qi->desc_status);
+               kfree(iommu->qi);
+       }
+
        if (iommu->reg)
                unmap_iommu(iommu);
 
-- 
1.7.10.4

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