Re: [RFC PATCH 0/4] Asynchronous passthrough ioctl

[Jens Axboe]

On 1/28/21 5:04 AM, Kanchan Joshi wrote:
> And for some ioctls, driver may still need to use task-work to update
> the user-space pointers (embedded in uring/ioctl cmd) during
> completion.

For this use case, we should ensure that just io_uring handles this
part. It's already got everything setup for it, and I'd rather avoid
having drivers touch any of those parts. Could be done by having an
io_uring helper ala:

io_uring_cmd_complete_in_task(cmd, handler);

which takes care of the nitty gritty details.

-- 
Jens Axboe