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[CPUFREQ] Fix limited cpufreq when booted on battery

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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: Thomas Renninger <trenn@suse.de>
Signed-off-by: Dave Jones <davej@redhat.com>
This commit is contained in:
Thomas Renninger 2007-04-19 15:48:34 +02:00 committed by Dave Jones
parent e8e49190f6
commit 22c970f346
1 changed files with 8 additions and 2 deletions
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10
drivers/cpufreq/cpufreq.c
View File

@ -768,6 +768,9 @@ static int cpufreq_add_dev (struct sys_device * sys_dev)
unlock_policy_rwsem_write(cpu);
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
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
* run in cpufreq_set_policy */
unlock_policy_rwsem_write(cpu);
/* 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) {
dprintk("setting policy failed\n");
goto err_out_unregister;