If the device fails to be added to the group, make sure to unlink the
reference before returning.
Signed-off-by: NJon Derrick <jonathan.derrick@intel.com>
Fixes: 39ab9555 ("iommu: Add sysfs bindings for struct iommu_device")
Acked-by: NLu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: NJoerg Roedel <jroedel@suse.de>