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Commit 22c970f3 authored by Thomas Renninger's avatar Thomas Renninger Committed by Dave Jones
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[CPUFREQ] Fix limited cpufreq when booted on battery 

References:
https://bugzilla.novell.com/show_bug.cgi?id=231107
https://bugzilla.novell.com/show_bug.cgi?id=264077



Fix limited cpufreq when booted on battery

If booted on battery:
cpufreq_set_policy (evil) is invoked which calls verify_within_limits.
max_freq gets lowered and therefore users_policy.max, which
is used to restore higher freqs via update_policy later is set to the
already limited frequency -> you can never go up again, even BIOS
allows higher freqs later.

Signed-off-by: default avatarThomas Renninger <trenn@suse.de>
Signed-off-by: default avatarDave Jones <davej@redhat.com>
parent e8e49190

drivers/cpufreq/cpufreq.c

+8 −2
Original line number Original line Diff line number Diff line
@@ -768,6 +768,9 @@ static int cpufreq_add_dev (struct sys_device * sys_dev) 
		unlock_policy_rwsem_write(cpu);

		unlock_policy_rwsem_write(cpu);

		goto err_out;

		goto err_out;

	}

	}

	policy->user_policy.min = policy->cpuinfo.min_freq;

	policy->user_policy.max = policy->cpuinfo.max_freq;

	policy->user_policy.governor = policy->governor;





#ifdef CONFIG_SMP

#ifdef CONFIG_SMP

	for_each_cpu_mask(j, policy->cpus) {

	for_each_cpu_mask(j, policy->cpus) {
@@ -858,10 +861,13 @@ static int cpufreq_add_dev (struct sys_device * sys_dev) 




	policy->governor = NULL; /* to assure that the starting sequence is

	policy->governor = NULL; /* to assure that the starting sequence is

				  * run in cpufreq_set_policy */

				  * run in cpufreq_set_policy */

	unlock_policy_rwsem_write(cpu);





	/* set default policy */

	/* set default policy */

	ret = cpufreq_set_policy(&new_policy);

	ret = __cpufreq_set_policy(policy, &new_policy);

	policy->user_policy.policy = policy->policy;



	unlock_policy_rwsem_write(cpu);



	if (ret) {

	if (ret) {

		dprintk("setting policy failed\n");

		dprintk("setting policy failed\n");

		goto err_out_unregister;

		goto err_out_unregister;