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authorViresh Kumar <viresh.kumar@linaro.org>2013-09-16 18:56:03 +0530
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-09-30 20:18:40 +0200
commit27047a603645d0885bcd72d7a0b6cce6e3c94ca7 (patch)
tree127e4ab6c9f749d1917014c7bb84e0d63655aad5 /drivers/cpufreq/freq_table.c
parent15c03dd4859ab16f9212238f29dd315654aa94f6 (diff)
downloadlinux-27047a603645d0885bcd72d7a0b6cce6e3c94ca7.tar.bz2
cpufreq: Add new helper cpufreq_table_validate_and_show()
Almost every cpufreq driver is required to validate its frequency table with: cpufreq_frequency_table_cpuinfo() and then expose it to cpufreq core with: cpufreq_frequency_table_get_attr(). This patch creates another helper routine cpufreq_table_validate_and_show() that will do both these steps in a single call and will return 0 for success, error otherwise. This also fixes potential bugs in cpufreq drivers where people have called cpufreq_frequency_table_get_attr() before calling cpufreq_frequency_table_cpuinfo(), as the later may fail. 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/freq_table.c')
-rw-r--r--drivers/cpufreq/freq_table.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/cpufreq/freq_table.c b/drivers/cpufreq/freq_table.c
index f111454a7aea..11f6fa92a58d 100644
--- a/drivers/cpufreq/freq_table.c
+++ b/drivers/cpufreq/freq_table.c
@@ -219,6 +219,18 @@ void cpufreq_frequency_table_put_attr(unsigned int cpu)
}
EXPORT_SYMBOL_GPL(cpufreq_frequency_table_put_attr);
+int cpufreq_table_validate_and_show(struct cpufreq_policy *policy,
+ struct cpufreq_frequency_table *table)
+{
+ int ret = cpufreq_frequency_table_cpuinfo(policy, table);
+
+ if (!ret)
+ cpufreq_frequency_table_get_attr(table, policy->cpu);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(cpufreq_table_validate_and_show);
+
void cpufreq_frequency_table_update_policy_cpu(struct cpufreq_policy *policy)
{
pr_debug("Updating show_table for new_cpu %u from last_cpu %u\n",