Commit 7b5c3938 authored by Rafael J. Wysocki's avatar Rafael J. Wysocki

Merge branch 'pm-runtime'

* pm-runtime:
  PM / Runtime: Spelling s/competing/completing/
  PM / Runtime: s/foo_process_requests/foo_process_next_request/
  PM / Runtime: GENERIC_SUBSYS_PM_OPS is gone
  PM / Runtime: Correct documented return values for generic PM callbacks
  PM / Runtime: Split line longer than 80 characters
  PM / Runtime: dev_pm_info.runtime_error is signed
parents 797cb8a6 9accff57
......@@ -232,7 +232,7 @@ defined in include/linux/pm.h:
equal to zero); the initial value of it is 1 (i.e. runtime PM is
initially disabled for all devices)
unsigned int runtime_error;
int runtime_error;
- if set, there was a fatal error (one of the callbacks returned error code
as described in Section 2), so the helper funtions will not work until
this flag is cleared; this is the error code returned by the failing
......@@ -401,11 +401,11 @@ drivers/base/power/runtime.c and include/linux/pm_runtime.h:
int pm_runtime_disable(struct device *dev);
- increment the device's 'power.disable_depth' field (if the value of that
field was previously zero, this prevents subsystem-level runtime PM
callbacks from being run for the device), make sure that all of the pending
runtime PM operations on the device are either completed or canceled;
returns 1 if there was a resume request pending and it was necessary to
execute the subsystem-level resume callback for the device to satisfy that
request, otherwise 0 is returned
callbacks from being run for the device), make sure that all of the
pending runtime PM operations on the device are either completed or
canceled; returns 1 if there was a resume request pending and it was
necessary to execute the subsystem-level resume callback for the device
to satisfy that request, otherwise 0 is returned
int pm_runtime_barrier(struct device *dev);
- check if there's a resume request pending for the device and resume it
......@@ -667,11 +667,11 @@ driver/base/power/generic_ops.c:
int pm_generic_runtime_suspend(struct device *dev);
- invoke the ->runtime_suspend() callback provided by the driver of this
device and return its result, or return -EINVAL if not defined
device and return its result, or return 0 if not defined
int pm_generic_runtime_resume(struct device *dev);
- invoke the ->runtime_resume() callback provided by the driver of this
device and return its result, or return -EINVAL if not defined
device and return its result, or return 0 if not defined
int pm_generic_suspend(struct device *dev);
- if the device has not been suspended at run time, invoke the ->suspend()
......@@ -727,15 +727,12 @@ driver/base/power/generic_ops.c:
int pm_generic_restore_noirq(struct device *dev);
- invoke the ->restore_noirq() callback provided by the device's driver
These functions can be assigned to the ->runtime_idle(), ->runtime_suspend(),
These functions are the defaults used by the PM core, if a subsystem doesn't
provide its own callbacks for ->runtime_idle(), ->runtime_suspend(),
->runtime_resume(), ->suspend(), ->suspend_noirq(), ->resume(),
->resume_noirq(), ->freeze(), ->freeze_noirq(), ->thaw(), ->thaw_noirq(),
->poweroff(), ->poweroff_noirq(), ->restore(), ->restore_noirq() callback
pointers in the subsystem-level dev_pm_ops structures.
If a subsystem wishes to use all of them at the same time, it can simply assign
the GENERIC_SUBSYS_PM_OPS macro, defined in include/linux/pm.h, to its
dev_pm_ops structure pointer.
->poweroff(), ->poweroff_noirq(), ->restore(), ->restore_noirq() in the
subsystem-level dev_pm_ops structure.
Device drivers that wish to use the same function as a system suspend, freeze,
poweroff and runtime suspend callback, and similarly for system resume, thaw,
......@@ -873,7 +870,7 @@ Here is a schematic pseudo-code example:
foo->is_suspended = 0;
pm_runtime_mark_last_busy(&foo->dev);
if (foo->num_pending_requests > 0)
foo_process_requests(foo);
foo_process_next_request(foo);
unlock(&foo->private_lock);
return 0;
}
......
......@@ -285,7 +285,7 @@ int pm_generic_restore(struct device *dev)
EXPORT_SYMBOL_GPL(pm_generic_restore);
/**
* pm_generic_complete - Generic routine competing a device power transition.
* pm_generic_complete - Generic routine completing a device power transition.
* @dev: Device to handle.
*
* Complete a device power transition during a system-wide power transition.
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment