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PM / core: Introduce dpm_async_fn() helper

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When we want to execute device pm functions asynchronously, we'll
do the following for the device:

  1) reinit_completion(&dev->power.completion);
  2) Check if the device enables asynchronous suspend.
  3) If necessary, execute the corresponding function asynchronously.

There are a lot of such repeated operations here, in fact we can avoid
this. So introduce dpm_async_fn() to have better code readability and
reuse.

And use this function to do some cleanup.

Signed-off-by: Yangtao Li <tiny.windzz@gmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Yangtao Li 2019-03-16 00:59:25 -04:00 committed by Rafael J. Wysocki
parent 0b237cb2fc
commit f2a424f6c6
1 changed files with 23 additions and 39 deletions
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62
drivers/base/power/main.c
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@ -706,6 +706,19 @@ static bool is_async(struct device *dev)
&& !pm_trace_is_enabled();
}
static bool dpm_async_fn(struct device *dev, async_func_t func)
{
reinit_completion(&dev->power.completion);
if (is_async(dev)) {
get_device(dev);
async_schedule(func, dev);
return true;
}
return false;
}
static void async_resume_noirq(void *data, async_cookie_t cookie)
{
struct device *dev = (struct device *)data;
@ -732,13 +745,8 @@ void dpm_noirq_resume_devices(pm_message_t state)
* in case the starting of async threads is
* delayed by non-async resuming devices.
*/
list_for_each_entry(dev, &dpm_noirq_list, power.entry) {
reinit_completion(&dev->power.completion);
if (is_async(dev)) {
get_device(dev);
async_schedule_dev(async_resume_noirq, dev);
}
}
list_for_each_entry(dev, &dpm_noirq_list, power.entry)
dpm_async_fn(dev, async_resume_noirq);
while (!list_empty(&dpm_noirq_list)) {
dev = to_device(dpm_noirq_list.next);
@ -889,13 +897,8 @@ void dpm_resume_early(pm_message_t state)
* in case the starting of async threads is
* delayed by non-async resuming devices.
*/
list_for_each_entry(dev, &dpm_late_early_list, power.entry) {
reinit_completion(&dev->power.completion);
if (is_async(dev)) {
get_device(dev);
async_schedule_dev(async_resume_early, dev);
}
}
list_for_each_entry(dev, &dpm_late_early_list, power.entry)
dpm_async_fn(dev, async_resume_early);
while (!list_empty(&dpm_late_early_list)) {
dev = to_device(dpm_late_early_list.next);
@ -1053,13 +1056,8 @@ void dpm_resume(pm_message_t state)
pm_transition = state;
async_error = 0;
list_for_each_entry(dev, &dpm_suspended_list, power.entry) {
reinit_completion(&dev->power.completion);
if (is_async(dev)) {
get_device(dev);
async_schedule_dev(async_resume, dev);
}
}
list_for_each_entry(dev, &dpm_suspended_list, power.entry)
dpm_async_fn(dev, async_resume);
while (!list_empty(&dpm_suspended_list)) {
dev = to_device(dpm_suspended_list.next);
@ -1373,13 +1371,9 @@ static void async_suspend_noirq(void *data, async_cookie_t cookie)
static int device_suspend_noirq(struct device *dev)
{
reinit_completion(&dev->power.completion);
if (is_async(dev)) {
get_device(dev);
async_schedule_dev(async_suspend_noirq, dev);
if (dpm_async_fn(dev, async_suspend_noirq))
return 0;
}
return __device_suspend_noirq(dev, pm_transition, false);
}
@ -1576,13 +1570,8 @@ static void async_suspend_late(void *data, async_cookie_t cookie)
static int device_suspend_late(struct device *dev)
{
reinit_completion(&dev->power.completion);
if (is_async(dev)) {
get_device(dev);
async_schedule_dev(async_suspend_late, dev);
if (dpm_async_fn(dev, async_suspend_late))
return 0;
}
return __device_suspend_late(dev, pm_transition, false);
}
@ -1842,13 +1831,8 @@ static void async_suspend(void *data, async_cookie_t cookie)
static int device_suspend(struct device *dev)
{
reinit_completion(&dev->power.completion);
if (is_async(dev)) {
get_device(dev);
async_schedule_dev(async_suspend, dev);
if (dpm_async_fn(dev, async_suspend))
return 0;
}
return __device_suspend(dev, pm_transition, false);
}