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author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2017-11-18 15:35:00 +0100 |
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committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2017-11-27 01:20:59 +0100 |
commit | db68daff90ef79761cc0bba16f775b6027ea3a83 (patch) | |
tree | ba7d8d3af71a6d1a080fa4b6246c8cdf367ee4a9 | |
parent | bd755d770ac78e8eeda05877ba66cc66f151e10e (diff) | |
download | linux-db68daff90ef79761cc0bba16f775b6027ea3a83.tar.gz linux-db68daff90ef79761cc0bba16f775b6027ea3a83.tar.xz |
ACPI / PM: Support for LEAVE_SUSPENDED driver flag in ACPI PM domain
Add support for DPM_FLAG_LEAVE_SUSPENDED to the ACPI PM domain by
making it (a) set the power.may_skip_resume status bit for devices
that, from its perspective, may be left in suspend after system
wakeup from sleep and (b) return early from acpi_subsys_resume_noirq()
for devices whose remaining resume callbacks during the transition
under way are going to be skipped by the PM core.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r-- | drivers/acpi/device_pm.c | 27 |
1 files changed, 24 insertions, 3 deletions
diff --git a/drivers/acpi/device_pm.c b/drivers/acpi/device_pm.c index e4ffaeec9ec2..5cfe794c36bd 100644 --- a/drivers/acpi/device_pm.c +++ b/drivers/acpi/device_pm.c @@ -990,7 +990,7 @@ void acpi_subsys_complete(struct device *dev) * the sleep state it is going out of and it has never been resumed till * now, resume it in case the firmware powered it up. */ - if (dev->power.direct_complete && pm_resume_via_firmware()) + if (pm_runtime_suspended(dev) && pm_resume_via_firmware()) pm_request_resume(dev); } EXPORT_SYMBOL_GPL(acpi_subsys_complete); @@ -1039,10 +1039,28 @@ EXPORT_SYMBOL_GPL(acpi_subsys_suspend_late); */ int acpi_subsys_suspend_noirq(struct device *dev) { - if (dev_pm_smart_suspend_and_suspended(dev)) + int ret; + + if (dev_pm_smart_suspend_and_suspended(dev)) { + dev->power.may_skip_resume = true; return 0; + } + + ret = pm_generic_suspend_noirq(dev); + if (ret) + return ret; + + /* + * If the target system sleep state is suspend-to-idle, it is sufficient + * to check whether or not the device's wakeup settings are good for + * runtime PM. Otherwise, the pm_resume_via_firmware() check will cause + * acpi_subsys_complete() to take care of fixing up the device's state + * anyway, if need be. + */ + dev->power.may_skip_resume = device_may_wakeup(dev) || + !device_can_wakeup(dev); - return pm_generic_suspend_noirq(dev); + return 0; } EXPORT_SYMBOL_GPL(acpi_subsys_suspend_noirq); @@ -1052,6 +1070,9 @@ EXPORT_SYMBOL_GPL(acpi_subsys_suspend_noirq); */ int acpi_subsys_resume_noirq(struct device *dev) { + if (dev_pm_may_skip_resume(dev)) + return 0; + /* * Devices with DPM_FLAG_SMART_SUSPEND may be left in runtime suspend * during system suspend, so update their runtime PM status to "active" |