On Sat, 18 Apr 2020 at 19:11, Rafael J. Wysocki <rjw@xxxxxxxxxxxxx> wrote: > > Hi, > > This is an update including some fixes and extra patches based on the > continuation of the discussion [1]. > > On Friday, April 10, 2020 5:46:27 PM CEST Rafael J. Wysocki wrote: > > Hi Alan, > > > > Following our recent discussion regarding the DPM_FLAG_* family of flags [1], > > I have decided to follow some of your recommendations and make changes to the > > core code handling those flags. > > > > The purpose of this is basically to make the code more consistent internally, > > easier to follow and better documented. > > > > First of all, patch [1/7] changes the PM core to skip driver-level "late" > > and "noirq" suspend callbacks for devices with SMART_SUSPEND set if they are > > still runtime-suspended during the "late" system-wide suspend phase (without > > the patch it does that only if subsystem-level late/noirq/early suspend/resume > > callbacks are not present for the device, which is demonstrably inconsistent) > > and updates the resume part of the code accordingly (it doesn't need to check > > whether or not the subsystem-level callbacks are present any more). > > > > The next patch, [2/7], is purely cosmetic and its only purpose is to reduce > > the LOC number and move related pieces of code closer to each other. > > The first two patches have not changed. > > > Patch [3/7] changes the PM core so that it doesn't skip any subsystem-level > > callbacks during system-wide resume (without the patch they may be skipped in > > the "early resume" and "resume" phases due to LEAVE_SUSPENDED being set which > > may be problematic) and to always run the driver's ->resume callback if the > > corresponding subsystem-level callback is not present (without the patch it > > may be skipped if LEAVE_SUSPENDED is set) to let it reverse the changes made > > by the driver's ->suspend callback (which always runs too) if need be. > > The difference between this one and patch [3/9] in the v2 is the fixed > definition of dev_pm_may_skip_resume(), renamed to dev_pm_skip_resume() by > one of the next patches. > > Patch [4/9] changes the handling of the power.may_skip_resume flag to set it > to 'true' by default and updates the subsystems aware of it to clear it when > they don't want devices to stay in suspend. > > > Patches [4-6/7] rename one function in the PM core and two driver PM flags to > > make their names better reflect their purpose. > > These are patches [5/9] and [7-8/9] in the v2 and patch [6/9] renames > dev_pm_smart_suspend_and_suspended() to dev_pm_skip_suspend(). > > > Finally, patch [7/7] updates the documentation of the driver PM flags to > > reflect the new code flows. > > This patch [9/9] now and it has been updated to reflect the new code changes. > > The pm-sleep-core branch: > > git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git \ > pm-sleep-core > > contains the v2 now. > > Cheers! Rafael, apologize for taking some time to review and respond. I noticed you have queued this up on your next branch by now, good. In any case, I have looked through the series and I think it looks good, thanks! Kind regards Uffe > > > [1] https://lore.kernel.org/linux-pm/Pine.LNX.4.44L0.2003251631360.1724-100000@xxxxxxxxxxxxxxxxxxxx/ > > >
