iommu/amd: Return -ENODEV in add_device when device is not handled by IOMMU

When check_device() fails on the device, it is not handled by the
IOMMU and amd_iommu_add_device() needs to return -ENODEV.
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Link: https://lore.kernel.org/r/20200429133712.31431-7-joro@8bytes.orgSigned-off-by: Joerg Roedel <jroedel@suse.de>

drivers/iommu/amd_iommu.c

@@ -2157,9 +2157,12 @@ static int amd_iommu_add_device(struct device *dev)
 	struct amd_iommu *iommu;
 	int ret, devid;
 
-	if (!check_device(dev) || get_dev_data(dev))
+	if (get_dev_data(dev))
 		return 0;
 
+	if (!check_device(dev))
+		return -ENODEV;
+
 	devid = get_device_id(dev);
 	if (devid < 0)
 		return devid;