USB interfaces should be probed with the parent USB device lock held, but this is not honoured when probe is deferred. Add a new bus_probe_device_deferred() helper to handle deferred probe where the parent device lock is not held. Fixes: d1c3414c2a9d ("drivercore: Add driver probe deferral mechanism") Reported-by: Mario Peter <mario.peter@leica-geosystems.com> Link: https://lore.kernel.org/20261007131514.1260696-1-mario.peter@leica-geosystems.com Cc: stable@vger.kernel.org # 3.4 Signed-off-by: Johan Hovold <johan@kernel.org> Link: https://patch.msgid.link/20261014133109.1392265-3-johan@kernel.org Signed-off-by: Danilo Krummrich <dakr@kernel.org>