On Wed, 2018-09-05 at 09:00 +0200, Hannes Reinecke wrote:

Update device_add_disk() to take an 'groups' argument so that
individual drivers can register a device with additional sysfs
attributes.
This avoids race condition the driver would otherwise have if these
groups were to be created with sysfs_add_groups().

Reviewed-by: Bart Van Assche <bvanassche@acm.org>