Commit 4ec6a9cc authored by Rafael J. Wysocki's avatar Rafael J. Wysocki

PM / runtime: Update documentation to reflect the current code flow

The runtime PM documentation in runtime_pm.txt has not been updated
after some changes to the system suspend and resume core code, so
update it to reflect the current code flow.
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: default avatarAlan Stern <stern@rowland.harvard.edu>
parent d6d211db
......@@ -648,15 +648,17 @@ The PM core does its best to reduce the probability of race conditions between
the runtime PM and system suspend/resume (and hibernation) callbacks by carrying
out the following operations:
* During system suspend it calls pm_runtime_get_noresume() and
pm_runtime_barrier() for every device right before executing the
subsystem-level .suspend() callback for it. In addition to that it calls
__pm_runtime_disable() with 'false' as the second argument for every device
right before executing the subsystem-level .suspend_late() callback for it.
* During system resume it calls pm_runtime_enable() and pm_runtime_put()
for every device right after executing the subsystem-level .resume_early()
callback and right after executing the subsystem-level .resume() callback
* During system suspend pm_runtime_get_noresume() is called for every device
right before executing the subsystem-level .prepare() callback for it and
pm_runtime_barrier() is called for every device right before executing the
subsystem-level .suspend() callback for it. In addition to that the PM core
calls __pm_runtime_disable() with 'false' as the second argument for every
device right before executing the subsystem-level .suspend_late() callback
for it.
* During system resume pm_runtime_enable() and pm_runtime_put() are called for
every device right after executing the subsystem-level .resume_early()
callback and right after executing the subsystem-level .complete() callback
for it, respectively.
7. Generic subsystem callbacks
......
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