Re: [PATCH v2 2/3] iommufd/device: Make hwpt_list list_add/del symmetric

[Jason Gunthorpe]

On Sat, Jan 28, 2023 at 01:18:10PM -0800, Nicolin Chen wrote:
> Since the list_del() of hwpt_item is done in iommufd_device_detach(), move
> its list_add_tail() to a similar place in iommufd_device_do_attach().
> 
> Also move and place the mutex outside the iommufd_device_auto_get_domain()
> and iommufd_device_do_attach() calls, to serialize attach/detach routines.
> This adds an additional locking protection so that the following patch can
> safely remove devices_lock.

That should be two patches then, this is just moving one line of code
from what I can tell?

Jason