Commit 7249924e authored by Viresh Kumar's avatar Viresh Kumar Committed by Rafael J. Wysocki
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cpufreq: Make sure target freq is within limits 



__cpufreq_driver_target() must not pass target frequency beyond the
limits of current policy.

Today most of cpufreq platform drivers are doing this check in their
target routines. Why not move it to __cpufreq_driver_target()?

Signed-off-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 5a1c0228

drivers/cpufreq/cpufreq.c

+9 −2
Original line number Diff line number Diff line
@@ -1470,12 +1470,19 @@ int __cpufreq_driver_target(struct cpufreq_policy *policy, 
			    unsigned int relation)

{

	int retval = -EINVAL;

	unsigned int old_target_freq = target_freq;



	if (cpufreq_disabled())

		return -ENODEV;



	pr_debug("target for CPU %u: %u kHz, relation %u\n", policy->cpu,

		target_freq, relation);

	/* Make sure that target_freq is within supported range */

	if (target_freq > policy->max)

		target_freq = policy->max;

	if (target_freq < policy->min)

		target_freq = policy->min;



	pr_debug("target for CPU %u: %u kHz, relation %u, requested %u kHz\n",

			policy->cpu, target_freq, relation, old_target_freq);



	if (target_freq == policy->cur)

		return 0;