[Linux-kernel-mentees] [PATCH v1] spi: spi-topcliff-pch: use generic power management

Andy Shevchenko andy.shevchenko at gmail.com
Mon Jul 27 11:12:16 UTC 2020

On Mon, Jul 27, 2020 at 10:08 AM Vaibhav Gupta <vaibhavgupta40 at gmail.com> wrote:
> On Sat, Jul 25, 2020 at 01:44:44PM +0300, Andy Shevchenko wrote:
> > On Sat, Jul 25, 2020 at 1:42 PM Andy Shevchenko
> > <andy.shevchenko at gmail.com> wrote:


> > The only problem here, is that the 2nd is already in the Mark's tree
> > and he doesn't do rebases.
> > So, it will be the other way around.
> >
> Concluding from yours and Bjorn's suggestion, I will drop the
> device_wakeup_disable() call form .resume() and send the fix. I will also track
> the drivers who got similar upgrades and went un-noticed.

Thanks for doing this!

> As Bjorn mentioned, the problem is that I don't have hardware to test, so I just
> replicated the legacy behaviour in generic by replacing
> pci_enable_wake(....,false) with device_wakeup_disable().
> So, from now, while upgrading drivers with generic PM, should I completely drop
> the pci_enable_wake(....,false) calls if both .suspend() and .resume() try to
> wakeup-disable the device?

I guess the best approach is to rely on the PCI core to do the right thing.
But mention this change in the commit message that we will have a
track of the changes properly.

With Best Regards,
Andy Shevchenko

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