tree 66eb244459aa071de90db3cb258370e7aeb1e910
parent 31ade3b83e1821da5fbb2f11b5b3d4ab2ec39db8
author Strashko, Grygorii <grygorii.strashko@ti.com> 1447148554 +0200
committer Rafael J. Wysocki <rafael.j.wysocki@intel.com> 1448891242 +0100

PM / sleep: prohibit devices probing during suspend/hibernation

It is unsafe [1] if probing of devices will happen during suspend or
hibernation and system behavior will be unpredictable in this case.
So, let's prohibit device's probing in dpm_prepare() and defer their
probing instead. The normal behavior will be restored in
dpm_complete().

This patch introduces new DD core APIs:
 device_block_probing()
   It will disable probing of devices and defer their probes instead.
 device_unblock_probing()
   It will restore normal behavior and trigger re-probing of deferred
   devices.

[1] https://lkml.org/lkml/2015/9/11/554

Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>