This is a note to let you know that I've just added the patch titled
PM: domains: Fix handling of unavailable/disabled idle states
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
pm-domains-fix-handling-of-unavailable-disabled-idle.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit bf3eb12390da9a33df008b3ff515a83a66279a6d
Author: Sudeep Holla <sudeep.holla@xxxxxxx>
Date: Tue Oct 25 13:34:32 2022 +0100
PM: domains: Fix handling of unavailable/disabled idle states
[ Upstream commit e0c57a5c70c13317238cb19a7ded0eab4a5f7de5 ]
Platforms can provide the information about the availability of each
idle states via status flag. Platforms may have to disable one or more
idle states for various reasons like broken firmware or other unmet
dependencies.
Fix handling of such unavailable/disabled idle states by ignoring them
while parsing the states.
Fixes: a3381e3a65cb ("PM / domains: Fix up domain-idle-states OF parsing")
Signed-off-by: Sudeep Holla <sudeep.holla@xxxxxxx>
Reviewed-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index 52c292d0908a..e865aa4b2504 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -2459,6 +2459,10 @@ static int genpd_iterate_idle_states(struct device_node *dn,
np = it.node;
if (!of_match_node(idle_state_match, np))
continue;
+
+ if (!of_device_is_available(np))
+ continue;
+
if (states) {
ret = genpd_parse_state(&states[i], np);
if (ret) {
