[PATCH V4 1/3] cpufreq: handle calls to ->target_index() in separate routine

Viresh Kumar
2014-05-21T09:04:44Z

Handling calls to ->target_index() has got complex over time and might become
more complex. So, its better to take target_index() bits out in another routine
__target_index() for better code readability. Shouldn't have any functional
impact.

Tested-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---
drivers/cpufreq/cpufreq.c | 56 ++++++++++++++++++++++++++++-------------------
1 file changed, 33 insertions(+), 23 deletions(-)

diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index a05c921..ae11dd5 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -1816,12 +1816,43 @@ EXPORT_SYMBOL(cpufreq_unregister_notifier);
* GOVERNORS *
*********************************************************************/

+static int __target_index(struct cpufreq_policy *policy,
+ struct cpufreq_frequency_table *freq_table, int index)
+{
+ struct cpufreq_freqs freqs;
+ int retval = -EINVAL;
+ bool notify;
+
+ notify = !(cpufreq_driver->flags & CPUFREQ_ASYNC_NOTIFICATION);
+
+ if (notify) {
+ freqs.old = policy->cur;
+ freqs.new = freq_table[index].frequency;
+ freqs.flags = 0;
+
+ pr_debug("%s: cpu: %d, oldfreq: %u, new freq: %u\n",
+ __func__, policy->cpu, freqs.old, freqs.new);
+
+ cpufreq_freq_transition_begin(policy, &freqs);
+ }
+
+ retval = cpufreq_driver->target_index(policy, index);
+ if (retval)
+ pr_err("%s: Failed to change cpu frequency: %d\n", __func__,
+ retval);
+
+ if (notify)
+ cpufreq_freq_transition_end(policy, &freqs, retval);
+
+ return retval;
+}
+
int __cpufreq_driver_target(struct cpufreq_policy *policy,
unsigned int target_freq,
unsigned int relation)
{
- int retval = -EINVAL;
unsigned int old_target_freq = target_freq;
+ int retval = -EINVAL;

if (cpufreq_disabled())
return -ENODEV;
@@ -1848,8 +1879,6 @@ int __cpufreq_driver_target(struct cpufreq_policy *policy,
retval = cpufreq_driver->target(policy, target_freq, relation);
else if (cpufreq_driver->target_index) {
struct cpufreq_frequency_table *freq_table;
- struct cpufreq_freqs freqs;
- bool notify;
int index;

freq_table = cpufreq_frequency_get_table(policy->cpu);
@@ -1870,26 +1899,7 @@ int __cpufreq_driver_target(struct cpufreq_policy *policy,
goto out;
}

- notify = !(cpufreq_driver->flags & CPUFREQ_ASYNC_NOTIFICATION);
-
- if (notify) {
- freqs.old = policy->cur;
- freqs.new = freq_table[index].frequency;
- freqs.flags = 0;
-
- pr_debug("%s: cpu: %d, oldfreq: %u, new freq: %u\n",
- __func__, policy->cpu, freqs.old, freqs.new);
-
- cpufreq_freq_transition_begin(policy, &freqs);
- }
-
- retval = cpufreq_driver->target_index(policy, index);
- if (retval)
- pr_err("%s: Failed to change cpu frequency: %d\n",
- __func__, retval);
-
- if (notify)
- cpufreq_freq_transition_end(policy, &freqs, retval);
+ retval = __target_index(policy, freq_table, index);
}

out:
--
2.0.0.rc2