linux

iv/linux

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Rafael J. Wysocki 05ff1ba412 PM: QoS: Invalidate frequency QoS requests after removal

Switching cpufreq drivers (or switching operation modes of the
intel_pstate driver from "active" to "passive" and vice versa)
does not work on some x86 systems with ACPI after commit
3000ce3c52f8 ("cpufreq: Use per-policy frequency QoS"), because
the ACPI _PPC and thermal code uses the same frequency QoS request
object for a given CPU every time a cpufreq driver is registered
and freq_qos_remove_request() does not invalidate the request after
removing it from its QoS list, so freq_qos_add_request() complains
and fails when that request is passed to it again.

Fix the issue by modifying freq_qos_remove_request() to clear the qos
and type fields of the frequency request pointed to by its argument
after removing it from its QoS list so as to invalidate it.

Fixes: 3000ce3c52f8 ("cpufreq: Use per-policy frequency QoS")
Reported-and-tested-by: Doug Smythies <dsmythies@telus.net>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>

2019-11-20 10:46:42 +01:00

autosleep.c

PM / wakeup: Show wakeup sources stats in sysfs

2019-08-21 00:20:40 +02:00

console.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

energy_model.c

sched/topology: Remove unused 'sd' parameter from arch_scale_cpu_capacity()

2019-06-24 19:23:39 +02:00

hibernate.c

hibernate: Disable when the kernel is locked down