Rafael J. Wysocki 3000ce3c52 cpufreq: Use per-policy frequency QoS ... Replace the CPU device PM QoS used for the management of min and max frequency constraints in cpufreq (and its users) with per-policy frequency QoS to avoid problems with cpufreq policies covering more then one CPU. Namely, a cpufreq driver is registered with the subsys interface which calls cpufreq_add_dev() for each CPU, starting from CPU0, so currently the PM QoS notifiers are added to the first CPU in the policy (i.e. CPU0 in the majority of cases). In turn, when the cpufreq driver is unregistered, the subsys interface doing that calls cpufreq_remove_dev() for each CPU, starting from CPU0, and the PM QoS notifiers are only removed when cpufreq_remove_dev() is called for the last CPU in the policy, say CPUx, which as a rule is not CPU0 if the policy covers more than one CPU. Then, the PM QoS notifiers cannot be removed, because CPUx does not have them, and they are still there in the device PM QoS notifiers list of CPU0, which prevents new PM QoS notifiers from being registered for CPU0 on the next attempt to register the cpufreq driver. The same issue occurs when the first CPU in the policy goes offline before unregistering the driver. After this change it does not matter which CPU is the policy CPU at the driver registration time and whether or not it is online all the time, because the frequency QoS is per policy and not per CPU. Fixes: 67d874c3b2 ("cpufreq: Register notifiers with the PM QoS framework") Reported-by: Dmitry Osipenko <digetx@gmail.com> Tested-by: Dmitry Osipenko <digetx@gmail.com> Reported-by: Sudeep Holla <sudeep.holla@arm.com> Tested-by: Sudeep Holla <sudeep.holla@arm.com> Diagnosed-by: Viresh Kumar <viresh.kumar@linaro.org> Link: https://lore.kernel.org/linux-pm/5ad2624194baa2f53acc1f1e627eb7684c577a19.1562210705.git.viresh.kumar@linaro.org/T/#md2d89e95906b8c91c15f582146173dce2e86e99f Link: https://lore.kernel.org/linux-pm/20191017094612.6tbkwoq4harsjcqv@vireshk-i7/T/#m30d48cc23b9a80467fbaa16e30f90b3828a5a29b Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org>		2019-10-21 02:05:21 +02:00
..
acpi-cpufreq.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156	2019-05-30 11:26:35 -07:00
amd_freq_sensitivity.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
arm_big_little.c	cpufreq: arm_big_little: Register an Energy Model	2019-02-07 09:55:11 +05:30
arm_big_little.h	cpufreq: arm_big_little: make function arguments and structure pointer const	2017-11-08 23:22:19 +01:00
armada-8k-cpufreq.c	cpufreq: ap806: Add NULL check after kcalloc	2019-07-22 11:12:15 +05:30
armada-37xx-cpufreq.c	cpufreq: armada-37xx: Remove set but not used variable 'freq'	2019-06-03 11:26:38 +05:30
bmips-cpufreq.c	cpufreq: Make cpufreq_generic_init() return void	2019-07-16 10:20:11 +02:00
brcmstb-avs-cpufreq.c	cpufreq: brcmstb-avs-cpufreq: Fix types for voltage/frequency	2019-06-04 09:31:41 +05:30
cppc_cpufreq.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441	2019-06-05 17:37:17 +02:00
cpufreq_conservative.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
cpufreq_governor_attr_set.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
cpufreq_governor.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
cpufreq_governor.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
cpufreq_ondemand.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
cpufreq_ondemand.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
cpufreq_performance.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
cpufreq_powersave.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
cpufreq_stats.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
cpufreq_userspace.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
cpufreq-dt-platdev.c	Merge branch 'cpufreq/qcom-updates' into cpufreq/arm/linux-next	2019-09-03 07:55:22 +05:30
cpufreq-dt.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
cpufreq-dt.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
cpufreq-nforce2.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 166	2019-05-30 11:26:39 -07:00
cpufreq.c	cpufreq: Use per-policy frequency QoS	2019-10-21 02:05:21 +02:00
davinci-cpufreq.c	Merge branch 'pm-cpufreq'	2019-07-18 09:49:30 +02:00
e_powersaver.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 166	2019-05-30 11:26:39 -07:00
elanfreq.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152	2019-05-30 11:26:32 -07:00
freq_table.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
gx-suspmod.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
highbank-cpufreq.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
ia64-acpi-cpufreq.c	treewide: Add SPDX license identifier for more missed files	2019-05-21 10:50:45 +02:00
imx6q-cpufreq.c	Merge branch 'pm-cpufreq'	2019-07-18 09:49:30 +02:00
imx-cpufreq-dt.c	cpufreq: imx-cpufreq-dt: Add i.MX8MN support	2019-08-22 11:31:04 +05:30
intel_pstate.c	cpufreq: Use per-policy frequency QoS	2019-10-21 02:05:21 +02:00
Kconfig	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
Kconfig.arm	Merge branch 'cpufreq/qcom-updates' into cpufreq/arm/linux-next	2019-09-03 07:55:22 +05:30
Kconfig.powerpc	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
Kconfig.x86	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
kirkwood-cpufreq.c	cpufreq: Make cpufreq_generic_init() return void	2019-07-16 10:20:11 +02:00
longhaul.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 166	2019-05-30 11:26:39 -07:00
longhaul.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 166	2019-05-30 11:26:39 -07:00
longrun.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 166	2019-05-30 11:26:39 -07:00
loongson1-cpufreq.c	cpufreq: Make cpufreq_generic_init() return void	2019-07-16 10:20:11 +02:00
loongson2_cpufreq.c	cpufreq: Make cpufreq_generic_init() return void	2019-07-16 10:20:11 +02:00
Makefile	Merge branch 'cpufreq/qcom-updates' into cpufreq/arm/linux-next	2019-09-03 07:55:22 +05:30
maple-cpufreq.c	Merge branch 'pm-cpufreq'	2019-07-18 09:49:30 +02:00
mediatek-cpufreq.c	cpufreq: mediatek: Add support for mt8183	2019-08-22 11:31:04 +05:30
mvebu-cpufreq.c	cpufreq: mvebu: Remove OPPs using dev_pm_opp_remove()	2018-09-19 14:56:44 -07:00
omap-cpufreq.c	Merge branch 'pm-cpufreq'	2019-07-18 09:49:30 +02:00
p4-clockmod.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152	2019-05-30 11:26:32 -07:00
pasemi-cpufreq.c	cpufreq/pasemi: fix use-after-free in pas_cpufreq_cpu_init()	2019-07-23 09:49:10 +02:00
pcc-cpufreq.c	cpufreq: pcc-cpufreq: Fail initialization if driver cannot be registered	2019-06-17 12:25:30 +02:00
pmac32-cpufreq.c	Merge branch 'pm-cpufreq'	2019-07-18 09:49:30 +02:00
pmac64-cpufreq.c	Merge branch 'pm-cpufreq'	2019-07-18 09:49:30 +02:00
powernow-k6.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 166	2019-05-30 11:26:39 -07:00
powernow-k7.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 166	2019-05-30 11:26:39 -07:00
powernow-k7.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 166	2019-05-30 11:26:39 -07:00
powernow-k8.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 166	2019-05-30 11:26:39 -07:00
powernow-k8.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 347	2019-06-05 17:37:08 +02:00
powernv-cpufreq.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 118	2019-05-24 17:39:02 +02:00
ppc_cbe_cpufreq_pervasive.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 153	2019-05-30 11:26:32 -07:00
ppc_cbe_cpufreq_pmi.c	cpufreq: Use per-policy frequency QoS	2019-10-21 02:05:21 +02:00
ppc_cbe_cpufreq.c	cpufreq: powerpc_cbe: Switch to QoS requests for freq limits	2019-08-26 10:02:01 +02:00
ppc_cbe_cpufreq.h	cpufreq: powerpc_cbe: Switch to QoS requests for freq limits	2019-08-26 10:02:01 +02:00
pxa2xx-cpufreq.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156	2019-05-30 11:26:35 -07:00
pxa3xx-cpufreq.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152	2019-05-30 11:26:32 -07:00
qcom-cpufreq-hw.c	cpufreq: qcom-hw: invoke frequency-invariance setter function	2019-08-22 11:31:04 +05:30
qcom-cpufreq-nvmem.c	cpufreq: qcom: Add support for qcs404 on nvmem driver	2019-09-03 07:55:00 +05:30
qoriq-cpufreq.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
raspberrypi-cpufreq.c	cpufreq: add driver for Raspberry Pi	2019-06-13 08:58:22 +05:30
s3c24xx-cpufreq-debugfs.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
s3c24xx-cpufreq.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
s3c64xx-cpufreq.c	Merge branch 'pm-cpufreq'	2019-07-18 09:49:30 +02:00
s3c2410-cpufreq.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
s3c2412-cpufreq.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
s3c2416-cpufreq.c	Merge branch 'pm-cpufreq'	2019-07-18 09:49:30 +02:00
s3c2440-cpufreq.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
s5pv210-cpufreq.c	Merge branch 'pm-cpufreq'	2019-07-18 09:49:30 +02:00
sa1100-cpufreq.c	cpufreq: Make cpufreq_generic_init() return void	2019-07-16 10:20:11 +02:00
sa1110-cpufreq.c	Merge branch 'pm-cpufreq'	2019-07-18 09:49:30 +02:00
sc520_freq.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152	2019-05-30 11:26:32 -07:00
scmi-cpufreq.c	Merge branch 'pm-opp'	2019-03-04 11:19:14 +01:00
scpi-cpufreq.c	cpufreq: scpi: Fix use after free	2019-03-28 11:14:31 +01:00
sfi-cpufreq.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 235	2019-06-19 17:09:07 +02:00
sh-cpufreq.c	cpufreq: sh: Don't validate the frequency table twice	2018-03-20 12:07:52 +01:00
sparc-us2e-cpufreq.c	treewide: Add SPDX license identifier for more missed files	2019-05-21 10:50:45 +02:00
sparc-us3-cpufreq.c	treewide: Add SPDX license identifier for more missed files	2019-05-21 10:50:45 +02:00
spear-cpufreq.c	cpufreq: Make cpufreq_generic_init() return void	2019-07-16 10:20:11 +02:00
speedstep-centrino.c	treewide: Add SPDX license identifier for more missed files	2019-05-21 10:50:45 +02:00
speedstep-ich.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 166	2019-05-30 11:26:39 -07:00
speedstep-lib.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 166	2019-05-30 11:26:39 -07:00
speedstep-lib.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 166	2019-05-30 11:26:39 -07:00
speedstep-smi.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 166	2019-05-30 11:26:39 -07:00
sti-cpufreq.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 312	2019-06-05 17:37:04 +02:00
sun50i-cpufreq-nvmem.c	cpufreq: Add sun50i nvmem based CPU scaling driver	2019-07-22 11:10:51 +05:30
tango-cpufreq.c	cpufreq: dt: Don't use generic platdev driver for tango	2017-07-22 02:20:59 +02:00
tegra20-cpufreq.c	cpufreq: Make cpufreq_generic_init() return void	2019-07-16 10:20:11 +02:00
tegra124-cpufreq.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 282	2019-06-05 17:36:37 +02:00
tegra186-cpufreq.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 288	2019-06-05 17:36:37 +02:00
ti-cpufreq.c	cpufreq: ti-cpufreq: Mark expected switch fall-through	2019-07-30 08:10:45 +05:30
unicore2-cpufreq.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
vexpress-spc-cpufreq.c	cpufreq: arm_big_little: make cpufreq_arm_bL_ops structures const	2017-11-08 23:22:20 +01:00