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

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

Documentation/power/runtime_pm.txt

+11 −9
Original line number Diff line number Diff line
@@ -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