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PM / OPP: Update performance state when freq == old_freq 

At boot up, CPUFreq core performs a sanity check to see if the system is
running at a frequency defined in the frequency table of the CPU. If so,
we try to find a valid frequency (lowest frequency greater than the
currently programmed frequency) from the table and set it. When the call
reaches dev_pm_opp_set_rate(), it calls _find_freq_ceil(opp_table,
&old_freq) to find the previously configured OPP and this call also
updates the old_freq. This eventually sets the old_freq == freq (new
target requested by cpufreq core) and we skip updating the performance
state in this case.

Fix this by also updating the performance state when the old_freq ==
freq.

Fixes: ca1b5d77b1 ("OPP: Configure all required OPPs")
Cc: v5.0 <stable@vger.kernel.org> # v5.0
Reported-by: Niklas Cassel <niklas.cassel@linaro.org>
Tested-by: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
hifive-unleashed-5.1
Viresh Kumar 2019-03-12 10:27:18 +05:30 committed by Rafael J. Wysocki
parent 55286a2938
commit faef080f6d
1 changed files with 1 additions and 1 deletions
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2
drivers/opp/core.c
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@ -760,7 +760,7 @@ int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq)
old_freq, freq);
/* Scaling up? Configure required OPPs before frequency */
if (freq > old_freq) {
if (freq >= old_freq) {
ret = _set_required_opps(dev, opp_table, opp);
if (ret)
goto put_opp;