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: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Acked-by: Alan Stern <stern@rowland.harvard.edu>
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@ -648,15 +648,17 @@ The PM core does its best to reduce the probability of race conditions between
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the runtime PM and system suspend/resume (and hibernation) callbacks by carrying
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out the following operations:
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* During system suspend it calls pm_runtime_get_noresume() and
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pm_runtime_barrier() for every device right before executing the
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subsystem-level .suspend() callback for it. In addition to that it calls
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__pm_runtime_disable() with 'false' as the second argument for every device
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right before executing the subsystem-level .suspend_late() callback for it.
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* During system suspend pm_runtime_get_noresume() is called for every device
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right before executing the subsystem-level .prepare() callback for it and
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pm_runtime_barrier() is called for every device right before executing the
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subsystem-level .suspend() callback for it. In addition to that the PM core
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calls __pm_runtime_disable() with 'false' as the second argument for every
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device right before executing the subsystem-level .suspend_late() callback
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for it.
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* During system resume it calls pm_runtime_enable() and pm_runtime_put()
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for every device right after executing the subsystem-level .resume_early()
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callback and right after executing the subsystem-level .resume() callback
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* During system resume pm_runtime_enable() and pm_runtime_put() are called for
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every device right after executing the subsystem-level .resume_early()
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callback and right after executing the subsystem-level .complete() callback
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for it, respectively.
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7. Generic subsystem callbacks
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