From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: Fri, 6 Apr 2018 07:04:23 +0000 (+0200)
Subject: Revert "cpufreq: Fix governor module removal race"
X-Git-Tag: v4.4.127~5
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=b13864b2fdde04d02f0d1601a1f0535165b0ed76;p=profile%2Fcommon%2Fplatform%2Fkernel%2Flinux-artik7.git

Revert "cpufreq: Fix governor module removal race"

This reverts commit 3f7dfb7fcf98a7e73dee018c4a68537ce7fec646 which was
commit a8b149d32b663c1a4105273295184b78f53d33cf upstream.

The backport was not correct, so just drop it entirely.

Reported-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index c0fb6f1..ebed319 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -551,8 +551,6 @@ static int cpufreq_parse_governor(char *str_governor, unsigned int *policy,
 			*governor = t;
 			err = 0;
 		}
-		if (t && !try_module_get(t->owner))
-			t = NULL;
 
 		mutex_unlock(&cpufreq_governor_mutex);
 	}
@@ -671,10 +669,6 @@ static ssize_t store_scaling_governor(struct cpufreq_policy *policy,
 		return -EINVAL;
 
 	ret = cpufreq_set_policy(policy, &new_policy);
-
-	if (new_policy.governor)
-		module_put(new_policy.governor->owner);
-
 	return ret ? ret : count;
 }