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[CPUFREQ] _PPC frequency change issues

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BIOS might change frequency behind our back when BIOS changes allowed
frequencies via _PPC.  In this case cpufreq core got out of sync.
Ask driver for current freq and notify governors about a change

Signed-off-by: Thomas Renninger <trenn@suse.de>
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Dave Jones <davej@redhat.com>
This commit is contained in:
Thomas Renninger
2006-01-26 18:46:33 +01:00
committed by Dave Jones
parent c70ca00f77
commit 0961dd0d21
1 changed files with 8 additions and 0 deletions
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8
drivers/cpufreq/cpufreq.c
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@@ -1429,6 +1429,14 @@ int cpufreq_update_policy(unsigned int cpu)
policy.policy = data->user_policy.policy; policy.policy = data->user_policy.policy;
policy.governor = data->user_policy.governor; policy.governor = data->user_policy.governor;
/* BIOS might change freq behind our back
-> ask driver for current freq and notify governors about a change */
if (cpufreq_driver->get) {
policy.cur = cpufreq_driver->get(cpu);
if (data->cur != policy.cur)
cpufreq_out_of_sync(cpu, data->cur, policy.cur);
}
ret = __cpufreq_set_policy(data, &policy); ret = __cpufreq_set_policy(data, &policy);
mutex_unlock(&data->lock); mutex_unlock(&data->lock);