| Message ID | 1503499329-28834-2-git-send-email-ulf.hansson@linaro.org |
|---|---|
| State | Superseded |
| Headers | show |
| Series | PM / ACPI / i2c: Deploy runtime PM centric path for system sleep | expand |
On Wed, Aug 23, 2017 at 4:42 PM, Ulf Hansson <ulf.hansson@linaro.org> wrote: > The commit 58a1fbbb2ee8 ("PM / PCI / ACPI: Kick devices that might have > been reset by firmware"), made PCI's and ACPI's ->complete() callbacks to > be assigned to a new API called pm_complete_with_resume_check(), which was > introduced in the same change. > > Later it turned out that using pm_complete_with_resume_check() isn't good > enough for PCI, as it needs additional PCI specific checks, before deciding > whether runtime resuming the device is needed when running the ->complete() > callback. > > This leaves ACPI being the only user of pm_complete_with_resume_check(). I would say "the ACPI PM domain" instead of just "ACPI" here, because in fact this is only about the ACPI PM domain. This more-or-less applies to all of the changelogs in this series and to some comments added by it too: please be specific that it is *only* about the ACPI PM domain. The patch itself is fine. Thanks, Rafael -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/acpi/acpi_lpss.c b/drivers/acpi/acpi_lpss.c index 032ae44..0c84d15 100644 --- a/drivers/acpi/acpi_lpss.c +++ b/drivers/acpi/acpi_lpss.c @@ -894,7 +894,7 @@ static struct dev_pm_domain acpi_lpss_pm_domain = { #ifdef CONFIG_PM #ifdef CONFIG_PM_SLEEP .prepare = acpi_subsys_prepare, - .complete = pm_complete_with_resume_check, + .complete = acpi_subsys_complete, .suspend = acpi_subsys_suspend, .suspend_late = acpi_lpss_suspend_late, .resume_early = acpi_lpss_resume_early, diff --git a/drivers/acpi/device_pm.c b/drivers/acpi/device_pm.c index fbcc73f..632f214 100644 --- a/drivers/acpi/device_pm.c +++ b/drivers/acpi/device_pm.c @@ -1020,6 +1020,23 @@ int acpi_subsys_prepare(struct device *dev) EXPORT_SYMBOL_GPL(acpi_subsys_prepare); /** + * acpi_subsys_complete - Finalize device's resume during system resume. + * @dev: Device to handle. + */ +void acpi_subsys_complete(struct device *dev) +{ + pm_generic_complete(dev); + /* + * If the device had been runtime-suspended before the system went into + * 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()) + pm_request_resume(dev); +} +EXPORT_SYMBOL_GPL(acpi_subsys_complete); + +/** * acpi_subsys_suspend - Run the device driver's suspend callback. * @dev: Device to handle. * @@ -1087,7 +1104,7 @@ static struct dev_pm_domain acpi_general_pm_domain = { .runtime_resume = acpi_subsys_runtime_resume, #ifdef CONFIG_PM_SLEEP .prepare = acpi_subsys_prepare, - .complete = pm_complete_with_resume_check, + .complete = acpi_subsys_complete, .suspend = acpi_subsys_suspend, .suspend_late = acpi_subsys_suspend_late, .resume_early = acpi_subsys_resume_early,
The commit 58a1fbbb2ee8 ("PM / PCI / ACPI: Kick devices that might have been reset by firmware"), made PCI's and ACPI's ->complete() callbacks to be assigned to a new API called pm_complete_with_resume_check(), which was introduced in the same change. Later it turned out that using pm_complete_with_resume_check() isn't good enough for PCI, as it needs additional PCI specific checks, before deciding whether runtime resuming the device is needed when running the ->complete() callback. This leaves ACPI being the only user of pm_complete_with_resume_check(). Therefore let's restore ACPI's acpi_subsys_complete(), which was dropped in commit 58a1fbbb2ee8 ("PM / PCI / ACPI: Kick devices that might have been reset by firmware"). This enables us to remove the pm_complete_with_resume_check() API in a following change, but it also enables ACPI to add more ACPI specific checks in acpi_subsys_complete() if it turns out that is needed. Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> --- Changes in v2: - None. --- drivers/acpi/acpi_lpss.c | 2 +- drivers/acpi/device_pm.c | 19 ++++++++++++++++++- 2 files changed, 19 insertions(+), 2 deletions(-) -- 2.7.4