PM regression with commit 5de85b9d57ab PM runtime re-init in v4.5-rc1

On 5 February 2016 at 02:08, Tony Lindgren [off-list ref] wrote:

* Ulf Hansson [off-list ref] [160204 14:35]:

quoted

On 4 February 2016 at 23:09, Alan Stern [off-list ref] wrote:

quoted

On Thu, 4 Feb 2016, Ulf Hansson wrote:

quoted

I am really not questioning the autosuspend feature at all, it's a
really great feature!

Now, I question the minor benefit we actually gain from having the
runtime PM core to update the mark in rpm_resume().

As Tony pointed out, it prevents some devices from going to sleep right
away.

Because their drivers don't care to update the last busy mark!?

Nope. Without that devices may never resume at all so the drivers
can't do anything about it.

I don't get it. Why not? Because of another abuse of the runtime PM API?

Or we should probably continue to focus on fixing the regression. :-)

Kind regards
Uffe