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

From: Dan Williams
Date: Mon Nov 26 2018 - 20:44:19 EST

On Thu, Nov 8, 2018 at 10:06 AM Alexander Duyck
<alexander.h.duyck@xxxxxxxxxxxxxxx> wrote:
> 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@xxxxxxx>
> Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
> Signed-off-by: Alexander Duyck <alexander.h.duyck@xxxxxxxxxxxxxxx>

I was going to complain about the new addition of "This function" in
the kernel-doc, but there are other occurrences in the file so that
can wait for some future cleanup.

I missed the __device_driver_unlock comment that Jane caught.

With that fixed up.

Reviewed-by: Dan Williams <dan.j.williams@xxxxxxxxx>