linux-kernel - Re: [PATCH 12/12] PM / core: Add AVOID

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Date:   Tue, 17 Oct 2017 19:25:33 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     "Rafael J. Wysocki" <rjw@...ysocki.net>
Cc:     Linux PM <linux-pm@...r.kernel.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Alan Stern <stern@...land.harvard.edu>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Linux ACPI <linux-acpi@...r.kernel.org>,
        Linux PCI <linux-pci@...r.kernel.org>,
        Linux Documentation <linux-doc@...r.kernel.org>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Kevin Hilman <khilman@...nel.org>,
        Wolfram Sang <wsa@...-dreams.de>, linux-i2c@...r.kernel.org,
        Lee Jones <lee.jones@...aro.org>
Subject: Re: [PATCH 12/12] PM / core: Add AVOID_RPM driver flag

On Tue, 2017-10-17 at 17:59 +0200, Rafael J. Wysocki wrote:
> On Tuesday, October 17, 2017 5:33:17 PM CEST Andy Shevchenko wrote:
> > On Mon, 2017-10-16 at 03:32 +0200, Rafael J. Wysocki wrote:

> > > If DPM_FLAG_SMART_SUSPEND is not set, DPM_FLAG_AVOID_RPM has no
> > > effect.
> > > 
> > > +	if (dev_pm_test_driver_flags(dev, DPM_FLAG_SMART_SUSPEND)
> > > &&
> > > +	    dev_pm_test_driver_flags(dev, DPM_FLAG_AVOID_RPM)) {
> > 
> > Wasn't interface designed to allow something like:
> > 	if (dev_pm_test_driver_flags(dev, DPM_FLAG_SMART_SUSPEND |
> > DPM_FLAG_AVOID_RPM)) {
> > instead?
> 
> That would return true if any of them was set and both are needed
> here.

Ah, indeed. It would not be equivalent. 

-- 
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Intel Finland Oy