On Thu, Jan 10, 2019 at 09:30:41AM +0800, Peter Chen wrote:

On Mon, Dec 24, 2018 at 12:44 AM Pawel Laszczak [off-list ref] wrote:
- debugfs is nice to have feature, I suggest removing it at this
initial version. Besides, role switch
through /sys is normal feature, the end user may use it at real
product, so, it is better at device's
/sys entry instead of debugfs.

- I don't know why you add "disable" at debugfs, please comment.

As you imply here, no real-world functionality should ever be in
debugfs as it is an optional system component and kernel code should
work just fine without it being enabled (as more and more systems are
disabling it due to the obvious security problems it has.)

thanks,

greg k-h