Re: [PATCH for 4.12] Revert "pinctrl: rockchip: avoid hardirq-unsafe functions in irq_chip"

[Brian Norris]

On Mon, Jun 26, 2017 at 11:24:09PM -0700, Tony Lindgren wrote:
> Hmm so how come drivers/bluetooth/btusb.c can't use the generic
> dev_pm_set_dedicated_wake_irq()? Can you please take a look?

I took a look previously, and last time I did, there were too many bugs
for it to be useful. You may have fixed the ones I reported w.r.t.
assumptions about runtime PM.

I also recall there being some difficulty with supporting
level-triggered interrupts that way. (This signal has no device-level
mask, and it triggers for all sorts of BT activity. There may not be a
relevant "edge".)

> If there are issues remaining let's rather fix them so we can get rid
> of the custom tinkering of wake-up events in the drivers.

That's nice, but that doesn't answer my questions. Perhaps that's a side
project. The point is that we're clearly violating the documented APIs.

Brian