12:40 p.m.
BCC: lkp(a)intel.com
CC: kbuild-all(a)lists.01.org
CC: linux-kernel(a)vger.kernel.org
TO: Dmitry Baryshkov <dmitry.baryshkov(a)linaro.org>
CC: Viresh Kumar <viresh.kumar(a)linaro.org>
CC: Vladimir Zapolskiy <vladimir.zapolskiy(a)linaro.org>
CC: Bjorn Andersson <bjorn.andersson(a)linaro.org>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: a335366bad1364a07f49df9da1fdfa6d411a5f39
commit: 6240aaad75e1a623872a830d13393d7aabf1052c cpufreq: qcom-hw: fix the opp entries
refcounting
date: 6 months ago
:::::: branch date: 31 hours ago
:::::: commit date: 6 months ago
config: arm-randconfig-m041-20220918
(https://download.01.org/0day-ci/archive/20220918/202209181024.rhoJMAL1-lk...)
compiler: arm-linux-gnueabi-gcc (GCC) 12.1.0
If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp(a)intel.com>
Reported-by: Dan Carpenter <dan.carpenter(a)oracle.com>
smatch warnings:
drivers/cpufreq/qcom-cpufreq-hw.c:333 qcom_lmh_dcvs_notify() error: uninitialized symbol
'throttled_freq'.
vim +/throttled_freq +333 drivers/cpufreq/qcom-cpufreq-hw.c
275157b367f479 Thara Gopinath 2021-08-09 289
275157b367f479 Thara Gopinath 2021-08-09 290 static void qcom_lmh_dcvs_notify(struct
qcom_cpufreq_data *data)
275157b367f479 Thara Gopinath 2021-08-09 291 {
275157b367f479 Thara Gopinath 2021-08-09 292 struct cpufreq_policy *policy =
data->policy;
5e4f009da6be56 Dmitry Baryshkov 2022-03-26 293 int cpu =
cpumask_first(policy->related_cpus);
275157b367f479 Thara Gopinath 2021-08-09 294 struct device *dev =
get_cpu_device(cpu);
0258cb19c77deb Lukasz Luba 2021-11-09 295 unsigned long freq_hz, throttled_freq;
275157b367f479 Thara Gopinath 2021-08-09 296 struct dev_pm_opp *opp;
275157b367f479 Thara Gopinath 2021-08-09 297 unsigned int freq;
275157b367f479 Thara Gopinath 2021-08-09 298
275157b367f479 Thara Gopinath 2021-08-09 299 /*
275157b367f479 Thara Gopinath 2021-08-09 300 * Get the h/w throttled frequency,
normalize it using the
275157b367f479 Thara Gopinath 2021-08-09 301 * registered opp table and use it to
calculate thermal pressure.
275157b367f479 Thara Gopinath 2021-08-09 302 */
275157b367f479 Thara Gopinath 2021-08-09 303 freq =
qcom_lmh_get_throttle_freq(data);
275157b367f479 Thara Gopinath 2021-08-09 304 freq_hz = freq * HZ_PER_KHZ;
275157b367f479 Thara Gopinath 2021-08-09 305
275157b367f479 Thara Gopinath 2021-08-09 306 opp = dev_pm_opp_find_freq_floor(dev,
&freq_hz);
275157b367f479 Thara Gopinath 2021-08-09 307 if (IS_ERR(opp) && PTR_ERR(opp)
== -ERANGE)
6240aaad75e1a6 Dmitry Baryshkov 2022-03-26 308 opp = dev_pm_opp_find_freq_ceil(dev,
&freq_hz);
275157b367f479 Thara Gopinath 2021-08-09 309
6240aaad75e1a6 Dmitry Baryshkov 2022-03-26 310 if (IS_ERR(opp)) {
6240aaad75e1a6 Dmitry Baryshkov 2022-03-26 311 dev_warn(dev, "Can't find the
OPP for throttling: %pe!\n", opp);
6240aaad75e1a6 Dmitry Baryshkov 2022-03-26 312 } else {
275157b367f479 Thara Gopinath 2021-08-09 313 throttled_freq = freq_hz / HZ_PER_KHZ;
275157b367f479 Thara Gopinath 2021-08-09 314
0258cb19c77deb Lukasz Luba 2021-11-09 315 /* Update thermal pressure (the boost
frequencies are accepted) */
0258cb19c77deb Lukasz Luba 2021-11-09 316
arch_update_thermal_pressure(policy->related_cpus, throttled_freq);
275157b367f479 Thara Gopinath 2021-08-09 317
6240aaad75e1a6 Dmitry Baryshkov 2022-03-26 318 dev_pm_opp_put(opp);
6240aaad75e1a6 Dmitry Baryshkov 2022-03-26 319 }
6240aaad75e1a6 Dmitry Baryshkov 2022-03-26 320
275157b367f479 Thara Gopinath 2021-08-09 321 /*
275157b367f479 Thara Gopinath 2021-08-09 322 * In the unlikely case policy is
unregistered do not enable
275157b367f479 Thara Gopinath 2021-08-09 323 * polling or h/w interrupt
275157b367f479 Thara Gopinath 2021-08-09 324 */
275157b367f479 Thara Gopinath 2021-08-09 325
mutex_lock(&data->throttle_lock);
275157b367f479 Thara Gopinath 2021-08-09 326 if (data->cancel_throttle)
275157b367f479 Thara Gopinath 2021-08-09 327 goto out;
275157b367f479 Thara Gopinath 2021-08-09 328
275157b367f479 Thara Gopinath 2021-08-09 329 /*
275157b367f479 Thara Gopinath 2021-08-09 330 * If h/w throttled frequency is higher
than what cpufreq has requested
275157b367f479 Thara Gopinath 2021-08-09 331 * for, then stop polling and switch
back to interrupt mechanism.
275157b367f479 Thara Gopinath 2021-08-09 332 */
275157b367f479 Thara Gopinath 2021-08-09 @333 if (throttled_freq >=
qcom_cpufreq_hw_get(cpu))
275157b367f479 Thara Gopinath 2021-08-09 334 enable_irq(data->throttle_irq);
275157b367f479 Thara Gopinath 2021-08-09 335 else
275157b367f479 Thara Gopinath 2021-08-09 336 mod_delayed_work(system_highpri_wq,
&data->throttle_work,
275157b367f479 Thara Gopinath 2021-08-09 337 msecs_to_jiffies(10));
275157b367f479 Thara Gopinath 2021-08-09 338
275157b367f479 Thara Gopinath 2021-08-09 339 out:
275157b367f479 Thara Gopinath 2021-08-09 340
mutex_unlock(&data->throttle_lock);
275157b367f479 Thara Gopinath 2021-08-09 341 }
275157b367f479 Thara Gopinath 2021-08-09 342
:::::: The code at line 333 was first introduced by commit
:::::: 275157b367f479334f3e2df7be93a3dd772f359c cpufreq: qcom-cpufreq-hw: Add dcvs
interrupt support
:::::: TO: Thara Gopinath <thara.gopinath(a)linaro.org>
:::::: CC: Viresh Kumar <viresh.kumar(a)linaro.org>
--
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