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Power management and ACPI fixes for v4.5-rc3 

- PM core fix to avoid false-positive warnings generated when
    the pm_domain field is cleared for a device that appears to
    be bound to a driver (Rafael Wysocki).
 
  - New MCH size workaround quirk for Intel Haswell-ULT (Josh Boyer).
 
  - Fix for an "unused function" compiler warning in the generic
    power domains framework (Ulf Hansson).
 
  - Fixup for the ACPI driver for Intel SoCs (acpi-lpss) to set
    the PM domain pointer of a device properly in one place that
    was overlooked by a recent PM core update (Andy Shevchenko).
 
  - Removal of a redundant function declaration in the ACPI CPPC
    core code (Timur Tabi).
 
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Merge tag 'pm+acpi-4.5-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management and ACPI fixes from Rafael Wysocki:
 "These are: a fix for a recently introduced false-positive warnings
  about PM domain pointers being changed inappropriately (harmless but
  annoying), an MCH size workaround quirk for one more platform, a
  compiler warning fix (generic power domains framework), an ACPI LPSS
  (Intel SoCs) driver fixup and a cleanup of the ACPI CPPC core code.

  Specifics:

   - PM core fix to avoid false-positive warnings generated when the
     pm_domain field is cleared for a device that appears to be bound to
     a driver (Rafael Wysocki).

   - New MCH size workaround quirk for Intel Haswell-ULT (Josh Boyer).

   - Fix for an "unused function" compiler warning in the generic power
     domains framework (Ulf Hansson).

   - Fixup for the ACPI driver for Intel SoCs (acpi-lpss) to set the PM
     domain pointer of a device properly in one place that was
     overlooked by a recent PM core update (Andy Shevchenko).

   - Removal of a redundant function declaration in the ACPI CPPC core
     code (Timur Tabi)"

* tag 'pm+acpi-4.5-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  PM: Avoid false-positive warnings in dev_pm_domain_set()
  PM / Domains: Silence compiler warning for an unused function
  ACPI / CPPC: remove redundant mbox_send_message() declaration
  ACPI / LPSS: set PM domain via helper setter
  PNP: Add Haswell-ULT to Intel MCH size workaround
This commit is contained in:
Linus Torvalds 2016-02-05 18:11:23 -08:00
parent dd6f86af39 79e2f8dd52
commit 22f60701d5
5 changed files with 10 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/acpi/acpi_lpss.c
View File

@ -880,7 +880,7 @@ static int acpi_lpss_platform_notify(struct notifier_block *nb,
break;
case BUS_NOTIFY_DRIVER_NOT_BOUND:
case BUS_NOTIFY_UNBOUND_DRIVER:
pdev->dev.pm_domain = NULL;
dev_pm_domain_set(&pdev->dev, NULL);
break;
case BUS_NOTIFY_ADD_DEVICE:
dev_pm_domain_set(&pdev->dev, &acpi_lpss_pm_domain);

2
drivers/base/power/common.c
View File

@ -146,7 +146,7 @@ void dev_pm_domain_set(struct device *dev, struct dev_pm_domain *pd)
if (dev->pm_domain == pd)
return;
WARN(device_is_bound(dev),
WARN(pd && device_is_bound(dev),
"PM domains can only be changed for unbound devices\n");
dev->pm_domain = pd;
device_pm_check_callbacks(dev);

27
drivers/base/power/domain.c
View File

@ -173,14 +173,14 @@ static void genpd_queue_power_off_work(struct generic_pm_domain *genpd)
}
/**
* __genpd_poweron - Restore power to a given PM domain and its masters.
* genpd_poweron - Restore power to a given PM domain and its masters.
* @genpd: PM domain to power up.
* @depth: nesting count for lockdep.
*
* Restore power to @genpd and all of its masters so that it is possible to
* resume a device belonging to it.
*/
static int __genpd_poweron(struct generic_pm_domain *genpd, unsigned int depth)
static int genpd_poweron(struct generic_pm_domain *genpd, unsigned int depth)
{
struct gpd_link *link;
int ret = 0;
@ -200,7 +200,7 @@ static int __genpd_poweron(struct generic_pm_domain *genpd, unsigned int depth)
genpd_sd_counter_inc(master);
mutex_lock_nested(&master->lock, depth + 1);
ret = __genpd_poweron(master, depth + 1);
ret = genpd_poweron(master, depth + 1);
mutex_unlock(&master->lock);
if (ret) {
@ -227,21 +227,6 @@ static int __genpd_poweron(struct generic_pm_domain *genpd, unsigned int depth)
return ret;
}
/**
* genpd_poweron - Restore power to a given PM domain and its masters.
* @genpd: PM domain to power up.
*/
static int genpd_poweron(struct generic_pm_domain *genpd)
{
int ret;
mutex_lock(&genpd->lock);
ret = __genpd_poweron(genpd, 0);
mutex_unlock(&genpd->lock);
return ret;
}
static int genpd_save_dev(struct generic_pm_domain *genpd, struct device *dev)
{
return GENPD_DEV_CALLBACK(genpd, int, save_state, dev);
@ -489,7 +474,7 @@ static int pm_genpd_runtime_resume(struct device *dev)
}
mutex_lock(&genpd->lock);
ret = __genpd_poweron(genpd, 0);
ret = genpd_poweron(genpd, 0);
mutex_unlock(&genpd->lock);
if (ret)
@ -1821,8 +1806,10 @@ int genpd_dev_pm_attach(struct device *dev)
dev->pm_domain->detach = genpd_dev_pm_detach;
dev->pm_domain->sync = genpd_dev_pm_sync;
ret = genpd_poweron(pd);
mutex_lock(&pd->lock);
ret = genpd_poweron(pd, 0);
mutex_unlock(&pd->lock);
out:
return ret ? -EPROBE_DEFER : 0;
}

1
drivers/pnp/quirks.c
View File

@ -342,6 +342,7 @@ static void quirk_amd_mmconfig_area(struct pnp_dev *dev)
/* Device IDs of parts that have 32KB MCH space */
static const unsigned int mch_quirk_devices[] = {
0x0154, /* Ivy Bridge */
0x0a04, /* Haswell-ULT */
0x0c00, /* Haswell */
0x1604, /* Broadwell */
};

1
include/acpi/cppc_acpi.h
View File

@ -133,6 +133,5 @@ extern int acpi_get_psd_map(struct cpudata **);
/* Methods to interact with the PCC mailbox controller. */
extern struct mbox_chan *
pcc_mbox_request_channel(struct mbox_client *, unsigned int);
extern int mbox_send_message(struct mbox_chan *chan, void *mssg);
#endif /* _CPPC_ACPI_H*/