Commit a9aba825 authored Oct 06, 2021 by Flavio Ceolin Committed by Christopher Friedt Oct 12, 2021

pm: Fix device resume order



Devices need to be resumed in the reverse order they are suspended.
e.g: devA +---> devB ---> devD
          |
          +---> devC

They are initialized in the following order, devA -> devB -> devC ->
devD, and suspended starting from the end of the list, devD -> devC ->
devB -> devA. When they are suspended they are temporary put in a list
that is used later to resume them.

This list has to be iterated from the end to the beginning, otherwise a
device may be resumed before its parent.

Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>

parent e7df33e8

subsys/pm/device.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -66,9 +66,9 @@ int pm_low_power_devices(void)

		void pm_resume_devices(void)
		{
		size_t i;
		int32_t i;

		for (i = 0; i < num_susp; i++) {
		for (i = (num_susp - 1); i >= 0; i--) {
		pm_device_state_set(__pm_device_slots_start[i],
		PM_DEVICE_STATE_ACTIVE);
		}

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