[CPUFREQ] Fix missing cpufreq_cpu_put() call in ->show

refactor to use gotos instead of explicit exit paths

Signed-off-by: Dave Jones <davej@redhat.com>

drivers/cpufreq/cpufreq.c

@@ -671,22 +671,23 @@ static ssize_t show(struct kobject * kobj, struct attribute * attr ,char * buf)
 {
 	struct cpufreq_policy * policy = to_policy(kobj);
 	struct freq_attr * fattr = to_attr(attr);
-	ssize_t ret;
+	ssize_t ret = -EINVAL;
 	policy = cpufreq_cpu_get(policy->cpu);
 	if (!policy)
-		return -EINVAL;
+		goto no_policy;
 
 	if (lock_policy_rwsem_read(policy->cpu) < 0)
-		return -EINVAL;
+		goto fail;
 
 	if (fattr->show)
 		ret = fattr->show(policy, buf);
 	else
 		ret = -EIO;
 
 	unlock_policy_rwsem_read(policy->cpu);
-
+fail:
 	cpufreq_cpu_put(policy);
+no_policy:
 	return ret;
 }