iommu/vt-d: Fix leak in intel_pasid_alloc_table on error path

If alloc_pages_node() fails, pasid_table is leaked. Free it.

Fixes: cc580e41 ("iommu/vt-d: Per PCI device pasid table interfaces")
Signed-off-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

drivers/iommu/intel-pasid.c

@@ -154,8 +154,10 @@ int intel_pasid_alloc_table(struct device *dev)
 	order = size ? get_order(size) : 0;
 	pages = alloc_pages_node(info->iommu->node,
 				 GFP_KERNEL | __GFP_ZERO, order);
-	if (!pages)
+	if (!pages) {
+		kfree(pasid_table);
 		return -ENOMEM;
+	}
 
 	pasid_table->table = page_address(pages);
 	pasid_table->order = order;