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| author | Viresh Kumar <viresh.kumar@linaro.org> | 2016-07-21 23:39:26 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-07-21 23:45:17 +0200 |
| commit | abe8bd024e7ac21ad21348c0fea09aefb4e469c7 (patch) | |
| tree | f2ded02076e86e7cd8fce195c08d2721f4a7e495 /drivers/cpufreq | |
| parent | cpufreq: acpi-cpufreq: use cached frequency mapping when possible (diff) | |
| download | linux-abe8bd024e7ac21ad21348c0fea09aefb4e469c7.tar.xz linux-abe8bd024e7ac21ad21348c0fea09aefb4e469c7.zip | |
cpufreq: Disallow ->resolve_freq() for drivers providing ->target_index()
The handlers provided by cpufreq core are sufficient for resolving the
frequency for drivers providing ->target_index(), as the core already
has the frequency table and so ->resolve_freq() isn't required for such
platforms.
This patch disallows drivers with ->target_index() callback to use the
->resolve_freq() callback.
Also, it fixes a potential kernel crash for drivers providing ->target()
but no ->resolve_freq().
Fixes: e3c062360870 "cpufreq: add cpufreq_driver_resolve_freq()"
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/cpufreq')
| -rw-r--r-- | drivers/cpufreq/cpufreq.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index b696baeb249d..3ef9be3965ff 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -507,12 +507,20 @@ unsigned int cpufreq_driver_resolve_freq(struct cpufreq_policy *policy, { target_freq = clamp_val(target_freq, policy->min, policy->max); policy->cached_target_freq = target_freq; + + if (cpufreq_driver->target_index) { + int idx; + + idx = cpufreq_frequency_table_target(policy, target_freq, + CPUFREQ_RELATION_L); + policy->cached_resolved_idx = idx; + return policy->freq_table[idx].frequency; + } + if (cpufreq_driver->resolve_freq) return cpufreq_driver->resolve_freq(policy, target_freq); - policy->cached_resolved_idx = - cpufreq_frequency_table_target(policy, target_freq, - CPUFREQ_RELATION_L); - return policy->freq_table[policy->cached_resolved_idx].frequency; + + return target_freq; } /********************************************************************* |