This is a note to let you know that I've just added the patch titled
cpufreq: cpufreq_register_driver() should return -ENODEV if init fails
to the 4.4-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:
cpufreq-cpufreq_register_driver-should-return-enodev-if-init-fails.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 6c77003677d5f1ce15f26d24360cb66c0bc07bb3 Mon Sep 17 00:00:00 2001
From: David Arcari <darcari@xxxxxxxxxx>
Date: Fri, 26 May 2017 11:37:31 -0400
Subject: cpufreq: cpufreq_register_driver() should return -ENODEV if init fails
From: David Arcari <darcari@xxxxxxxxxx>
commit 6c77003677d5f1ce15f26d24360cb66c0bc07bb3 upstream.
For a driver that does not set the CPUFREQ_STICKY flag, if all of the
->init() calls fail, cpufreq_register_driver() should return an error.
This will prevent the driver from loading.
Fixes: ce1bcfe94db8 (cpufreq: check cpufreq_policy_list instead of scanning policies for all CPUs)
Signed-off-by: David Arcari <darcari@xxxxxxxxxx>
Acked-by: Viresh Kumar <viresh.kumar@xxxxxxxxxx>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/cpufreq/cpufreq.c | 1 +
1 file changed, 1 insertion(+)
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -2451,6 +2451,7 @@ int cpufreq_register_driver(struct cpufr
if (!(cpufreq_driver->flags & CPUFREQ_STICKY) &&
list_empty(&cpufreq_policy_list)) {
/* if all ->init() calls failed, unregister */
+ ret = -ENODEV;
pr_debug("%s: No CPU initialized for driver %s\n", __func__,
driver_data->name);
goto err_if_unreg;
Patches currently in stable-queue which might be from darcari@xxxxxxxxxx are
queue-4.4/cpufreq-cpufreq_register_driver-should-return-enodev-if-init-fails.patch