Using the managed variant to allocate the resource makes the code simpler
and less error-prone.
Tested-by: NDarren Etheridge <detheridge@ti.com>
Tested-by: NJohannes Pointner <johannes.pointner@br-automation.com>
Signed-off-by: NEzequiel Garcia <ezequiel@vanguardiasur.com.ar>
Signed-off-by: NDave Airlie <airlied@redhat.com>