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PM / QOS: Rename __dev_pm_qos_read_value() and dev_pm_qos_raw_read_value()

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dev_pm_qos_read_value() will soon need to support more constraint types
(min/max frequency) and will have another argument to it, i.e. type of
the constraint. While that is fine for the existing users of
dev_pm_qos_read_value(), but not that optimal for the callers of
__dev_pm_qos_read_value() and dev_pm_qos_raw_read_value() as all the
callers of these two routines are only looking for resume latency
constraint.

Lets make these two routines care only about the resume latency
constraint and rename them to __dev_pm_qos_resume_latency() and
dev_pm_qos_raw_resume_latency().

Suggested-by: Rafael J. Wysocki <rjw@rjwysocki.net>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Viresh Kumar 2019-07-04 13:06:18 +05:30 committed by Rafael J. Wysocki
parent 0b07ee9447
commit 8262331eaa
5 changed files with 16 additions and 11 deletions
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2
drivers/base/power/domain_governor.c
View File

@ -66,7 +66,7 @@ static bool default_suspend_ok(struct device *dev)
td->constraint_changed = false;
td->cached_suspend_ok = false;
td->effective_constraint_ns = 0;
constraint_ns = __dev_pm_qos_read_value(dev);
constraint_ns = __dev_pm_qos_resume_latency(dev);
spin_unlock_irqrestore(&dev->power.lock, flags);

13
drivers/base/power/qos.c
View File

@ -90,16 +90,16 @@ enum pm_qos_flags_status dev_pm_qos_flags(struct device *dev, s32 mask)
EXPORT_SYMBOL_GPL(dev_pm_qos_flags);
/**
* __dev_pm_qos_read_value - Get PM QoS constraint for a given device.
* __dev_pm_qos_resume_latency - Get resume latency constraint for a given device.
* @dev: Device to get the PM QoS constraint value for.
*
* This routine must be called with dev->power.lock held.
*/
s32 __dev_pm_qos_read_value(struct device *dev)
s32 __dev_pm_qos_resume_latency(struct device *dev)
{
lockdep_assert_held(&dev->power.lock);
return dev_pm_qos_raw_read_value(dev);
return dev_pm_qos_raw_resume_latency(dev);
}
/**
@ -112,7 +112,12 @@ s32 dev_pm_qos_read_value(struct device *dev)
s32 ret;
spin_lock_irqsave(&dev->power.lock, flags);
ret = __dev_pm_qos_read_value(dev);
if (IS_ERR_OR_NULL(dev->power.qos))
ret = PM_QOS_RESUME_LATENCY_NO_CONSTRAINT;
else
ret = pm_qos_read_value(&dev->power.qos->resume_latency);
spin_unlock_irqrestore(&dev->power.lock, flags);
return ret;

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

@ -275,7 +275,7 @@ static int rpm_check_suspend_allowed(struct device *dev)
|| (dev->power.request_pending
&& dev->power.request == RPM_REQ_RESUME))
retval = -EAGAIN;
else if (__dev_pm_qos_read_value(dev) == 0)
else if (__dev_pm_qos_resume_latency(dev) == 0)
retval = -EPERM;
else if (dev->power.runtime_status == RPM_SUSPENDED)
retval = 1;

2
drivers/cpuidle/governor.c
View File

@ -110,7 +110,7 @@ int cpuidle_governor_latency_req(unsigned int cpu)
{
int global_req = pm_qos_request(PM_QOS_CPU_DMA_LATENCY);
struct device *device = get_cpu_device(cpu);
int device_req = dev_pm_qos_raw_read_value(device);
int device_req = dev_pm_qos_raw_resume_latency(device);
return device_req < global_req ? device_req : global_req;
}

8
include/linux/pm_qos.h
View File

@ -139,7 +139,7 @@ s32 pm_qos_read_value(struct pm_qos_constraints *c);
#ifdef CONFIG_PM
enum pm_qos_flags_status __dev_pm_qos_flags(struct device *dev, s32 mask);
enum pm_qos_flags_status dev_pm_qos_flags(struct device *dev, s32 mask);
s32 __dev_pm_qos_read_value(struct device *dev);
s32 __dev_pm_qos_resume_latency(struct device *dev);
s32 dev_pm_qos_read_value(struct device *dev);
int dev_pm_qos_add_request(struct device *dev, struct dev_pm_qos_request *req,
enum dev_pm_qos_req_type type, s32 value);
@ -176,7 +176,7 @@ static inline s32 dev_pm_qos_requested_flags(struct device *dev)
return dev->power.qos->flags_req->data.flr.flags;
}
static inline s32 dev_pm_qos_raw_read_value(struct device *dev)
static inline s32 dev_pm_qos_raw_resume_latency(struct device *dev)
{
return IS_ERR_OR_NULL(dev->power.qos) ?
PM_QOS_RESUME_LATENCY_NO_CONSTRAINT :
@ -189,7 +189,7 @@ static inline enum pm_qos_flags_status __dev_pm_qos_flags(struct device *dev,
static inline enum pm_qos_flags_status dev_pm_qos_flags(struct device *dev,
s32 mask)
{ return PM_QOS_FLAGS_UNDEFINED; }
static inline s32 __dev_pm_qos_read_value(struct device *dev)
static inline s32 __dev_pm_qos_resume_latency(struct device *dev)
{ return PM_QOS_RESUME_LATENCY_NO_CONSTRAINT; }
static inline s32 dev_pm_qos_read_value(struct device *dev)
{ return PM_QOS_RESUME_LATENCY_NO_CONSTRAINT; }
@ -245,7 +245,7 @@ static inline s32 dev_pm_qos_requested_resume_latency(struct device *dev)
return PM_QOS_RESUME_LATENCY_NO_CONSTRAINT;
}
static inline s32 dev_pm_qos_requested_flags(struct device *dev) { return 0; }
static inline s32 dev_pm_qos_raw_read_value(struct device *dev)
static inline s32 dev_pm_qos_raw_resume_latency(struct device *dev)
{
return PM_QOS_RESUME_LATENCY_NO_CONSTRAINT;
}