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cpufreq: Improve code around unlisted freq check 

The cpufreq core checks if the frequency programmed by the bootloaders
is not listed in the freq table and programs one from the table in such
a case. This is done only if the driver has set the
CPUFREQ_NEED_INITIAL_FREQ_CHECK flag.

Currently we print two separate messages, with almost the same content,
and do this with a pr_warn() which may be a bit too much as the driver
only asked us to check this as it expected this to be the case. Lower
down the severity of the print message by switching to pr_info() instead
and print a single message only.

Reported-by: Sumit Gupta <sumitg@nvidia.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Sumit Gupta <sumitg@nvidia.com>
Tested-by: Sumit Gupta <sumitg@nvidia.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Viresh Kumar 2020-10-13 10:42:47 +05:30 committed by Rafael J. Wysocki
parent 0b8417c141
commit 97148d0ae5
1 changed files with 7 additions and 8 deletions
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15
drivers/cpufreq/cpufreq.c
View File

@ -1454,14 +1454,13 @@ static int cpufreq_online(unsigned int cpu)
*/
if ((cpufreq_driver->flags & CPUFREQ_NEED_INITIAL_FREQ_CHECK)
&& has_target()) {
unsigned int old_freq = policy->cur;
/* Are we running at unknown frequency ? */
ret = cpufreq_frequency_table_get_index(policy, policy->cur);
ret = cpufreq_frequency_table_get_index(policy, old_freq);
if (ret == -EINVAL) {
/* Warn user and fix it */
pr_warn("%s: CPU%d: Running at unlisted freq: %u KHz\n",
__func__, policy->cpu, policy->cur);
ret = __cpufreq_driver_target(policy, policy->cur - 1,
CPUFREQ_RELATION_L);
ret = __cpufreq_driver_target(policy, old_freq - 1,
CPUFREQ_RELATION_L);
/*
* Reaching here after boot in a few seconds may not
@ -1469,8 +1468,8 @@ static int cpufreq_online(unsigned int cpu)
* frequency for longer duration. Hence, a BUG_ON().
*/
BUG_ON(ret);
pr_warn("%s: CPU%d: Unlisted initial frequency changed to: %u KHz\n",
__func__, policy->cpu, policy->cur);
pr_info("%s: CPU%d: Running at unlisted initial frequency: %u KHz, changing to: %u KHz\n",
__func__, policy->cpu, old_freq, policy->cur);
}
}