Re: [driver-core PATCH v6 3/9] device core: Consolidate locking and unlocking of parent and device

Try to consolidate all of the locking and unlocking of both the parent and device when attaching or removing a driver from a given device. To do that I first consolidated the lock pattern into two functions __device_driver_lock and __device_driver_unlock. After doing that I then created functions specific to attaching and detaching the driver while acquiring these locks. By doing this I was able to reduce the number of spots where we touch need_parent_lock from 12 down to 4. Reviewed-by: Bart Van Assche <bvanassche(a)acm.org&gt; Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki(a)intel.com&gt; Signed-off-by: Alexander Duyck <alexander.h.duyck(a)linux.intel.com&gt;