Rafael J. Wysocki 89ab39da14 cpufreq: Avoid cpufreq_suspend() deadlock on system shutdown ... commit 65650b3513 upstream. It is incorrect to set the cpufreq syscore shutdown callback pointer to cpufreq_suspend(), because that function cannot be run in the syscore stage of system shutdown for two reasons: (a) it may attempt to carry out actions depending on devices that have already been shut down at that point and (b) the RCU synchronization carried out by it may not be able to make progress then. The latter issue has been present since commit 45975c7d21 ("rcu: Define RCU-sched API in terms of RCU for Tree RCU PREEMPT builds"), but the former one has been there since commit 90de2a4aa9 ("cpufreq: suspend cpufreq governors on shutdown") regardless. Fix that by dropping cpufreq_syscore_ops altogether and making device_shutdown() call cpufreq_suspend() directly before shutting down devices, which is along the lines of what system-wide power management does. Fixes: 45975c7d21 ("rcu: Define RCU-sched API in terms of RCU for Tree RCU PREEMPT builds") Fixes: 90de2a4aa9 ("cpufreq: suspend cpufreq governors on shutdown") Reported-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Tested-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Cc: 4.0+ <stable@vger.kernel.org> # 4.0+ Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2019-10-29 09:20:08 +01:00
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acpi-cpufreq.c	cpufreq: acpi-cpufreq: Report if CPU doesn't support boost technologies	2019-04-05 22:33:03 +02:00
amd_freq_sensitivity.c
arm_big_little_dt.c
arm_big_little.c
arm_big_little.h
armada-37xx-cpufreq.c	cpufreq: armada-37xx: fix frequency calculation for opp	2019-05-10 17:54:10 +02:00
bmips-cpufreq.c
brcmstb-avs-cpufreq.c
cppc_cpufreq.c
cpufreq_conservative.c	cpufreq: conservative: Take limits changes into account properly	2018-11-13 11:08:16 -08:00
cpufreq_governor_attr_set.c
cpufreq_governor.c	sched/cpufreq: Fix kobject memleak	2019-05-31 06:46:12 -07:00
cpufreq_governor.h
cpufreq_ondemand.c
cpufreq_ondemand.h
cpufreq_performance.c
cpufreq_powersave.c
cpufreq_stats.c
cpufreq_userspace.c
cpufreq-dt-platdev.c
cpufreq-dt.c	cpufreq: dt: Try freeing static OPPs only if we have added them	2018-11-13 11:08:24 -08:00
cpufreq-dt.h
cpufreq-nforce2.c
cpufreq.c	cpufreq: Avoid cpufreq_suspend() deadlock on system shutdown	2019-10-29 09:20:08 +01:00
davinci-cpufreq.c
e_powersaver.c
elanfreq.c
freq_table.c
gx-suspmod.c
highbank-cpufreq.c
ia64-acpi-cpufreq.c
imx6q-cpufreq.c	cpufreq: imx6q: add return value check for voltage scale	2018-12-01 09:37:32 +01:00
intel_pstate.c	x86/cpu: Sanitize FAM6_ATOM naming	2019-05-14 19:17:53 +02:00
Kconfig
Kconfig.arm
Kconfig.powerpc
Kconfig.x86
kirkwood-cpufreq.c	cpufreq: kirkwood: fix possible object reference leak	2019-05-31 06:46:24 -07:00
longhaul.c
longhaul.h
longrun.c
loongson1-cpufreq.c
loongson2_cpufreq.c
Makefile
maple-cpufreq.c
mediatek-cpufreq.c
mvebu-cpufreq.c
omap-cpufreq.c
p4-clockmod.c
pasemi-cpufreq.c	cpufreq/pasemi: fix use-after-free in pas_cpufreq_cpu_init()	2019-08-16 10:12:46 +02:00
pcc-cpufreq.c
pmac32-cpufreq.c	cpufreq: pmac32: fix possible object reference leak	2019-05-31 06:46:24 -07:00
pmac64-cpufreq.c
powernow-k6.c
powernow-k7.c
powernow-k7.h
powernow-k8.c
powernow-k8.h
powernv-cpufreq.c
ppc_cbe_cpufreq_pervasive.c
ppc_cbe_cpufreq_pmi.c
ppc_cbe_cpufreq.c	cpufreq: ppc_cbe: fix possible object reference leak	2019-05-31 06:46:24 -07:00
ppc_cbe_cpufreq.h
pxa2xx-cpufreq.c	cpufreq: pxa2xx: remove incorrect __init annotation	2019-03-23 20:10:01 +01:00
pxa3xx-cpufreq.c
qcom-cpufreq-kryo.c	cpufreq: kryo: Release OPP tables on module removal	2019-03-23 20:10:01 +01:00
qoriq-cpufreq.c
s3c24xx-cpufreq-debugfs.c
s3c24xx-cpufreq.c
s3c64xx-cpufreq.c
s3c2410-cpufreq.c
s3c2412-cpufreq.c
s3c2416-cpufreq.c
s3c2440-cpufreq.c
s5pv210-cpufreq.c
sa1100-cpufreq.c
sa1110-cpufreq.c
sc520_freq.c
scmi-cpufreq.c	cpufreq: scmi: Fix frequency invariance in slow path	2019-01-16 22:04:29 +01:00
scpi-cpufreq.c
sfi-cpufreq.c
sh-cpufreq.c
sparc-us2e-cpufreq.c
sparc-us3-cpufreq.c
spear-cpufreq.c
speedstep-centrino.c
speedstep-ich.c
speedstep-lib.c
speedstep-lib.h
speedstep-smi.c
sti-cpufreq.c
tango-cpufreq.c
tegra20-cpufreq.c
tegra124-cpufreq.c	cpufreq: tegra124: add missing of_node_put()	2019-03-23 20:10:01 +01:00
tegra186-cpufreq.c
ti-cpufreq.c	cpufreq: ti-cpufreq: Only register platform_device when supported	2018-12-13 09:16:13 +01:00
unicore2-cpufreq.c
vexpress-spc-cpufreq.c