Chen Yu c4a3fa261b cpufreq: Bring CPUs up even if cpufreq_online() failed ... There is a report that after commit 27622b061e ("cpufreq: Convert to hotplug state machine"), the normal CPU offline/online cycle fails on some platforms. According to the ftrace result, this problem was triggered on platforms using acpi-cpufreq as the default cpufreq driver, and due to the lack of some ACPI freq method (eg. _PCT), cpufreq_online() failed and returned a negative value, so the CPU hotplug state machine rolled back the CPU online process. Actually, from the user's perspective, the failure of cpufreq_online() should not prevent that CPU from being brought up, although cpufreq might not work on that CPU. BTW, during system startup cpufreq_online() is not invoked via CPU online but by the cpufreq device creation process, so the APs can be brought up even though cpufreq_online() fails in that stage. This patch ignores the return value of cpufreq_online/offline() and lets the cpufreq framework deal with the failure. cpufreq_online() itself will do a proper rollback in that case and if _PCT is missing, the ACPI cpufreq driver will print a warning if the corresponding debug options have been enabled. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=194581 Fixes: 27622b061e ("cpufreq: Convert to hotplug state machine") Reported-and-tested-by: Tomasz Maciej Nowak <tmn505@gmail.com> Signed-off-by: Chen Yu <yu.c.chen@intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Cc: 4.9+ <stable@vger.kernel.org> # 4.9+ Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>		2017-04-13 03:38:44 +02:00
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acpi-cpufreq.c
amd_freq_sensitivity.c
arm_big_little_dt.c
arm_big_little.c
arm_big_little.h
at32ap-cpufreq.c
blackfin-cpufreq.c
bmips-cpufreq.c
brcmstb-avs-cpufreq.c
cppc_cpufreq.c
cpufreq_conservative.c
cpufreq_governor_attr_set.c
cpufreq_governor.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/cpufreq.h>	2017-03-02 08:42:30 +01:00
cpufreq_governor.h	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/cpufreq.h>	2017-03-02 08:42:30 +01:00
cpufreq_ondemand.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/cpufreq.h>	2017-03-02 08:42:30 +01:00
cpufreq_ondemand.h
cpufreq_performance.c
cpufreq_powersave.c
cpufreq_stats.c
cpufreq_userspace.c
cpufreq-dt-platdev.c
cpufreq-dt.c
cpufreq-dt.h
cpufreq-nforce2.c
cpufreq.c	cpufreq: Bring CPUs up even if cpufreq_online() failed	2017-04-13 03:38:44 +02:00
cris-artpec3-cpufreq.c
cris-etraxfs-cpufreq.c
davinci-cpufreq.c
dbx500-cpufreq.c
e_powersaver.c
elanfreq.c
exynos5440-cpufreq.c
freq_table.c
gx-suspmod.c
highbank-cpufreq.c
ia64-acpi-cpufreq.c
imx6q-cpufreq.c
intel_pstate.c	cpufreq: intel_pstate: Fix policy data management in passive mode	2017-03-21 22:19:07 +01:00
Kconfig
Kconfig.arm
Kconfig.powerpc
Kconfig.x86
kirkwood-cpufreq.c
longhaul.c
longhaul.h
longrun.c
loongson1-cpufreq.c
loongson2_cpufreq.c
Makefile
maple-cpufreq.c
mt8173-cpufreq.c
mvebu-cpufreq.c
omap-cpufreq.c
p4-clockmod.c
pasemi-cpufreq.c
pcc-cpufreq.c
pmac32-cpufreq.c
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
ppc_cbe_cpufreq.h
pxa2xx-cpufreq.c
pxa3xx-cpufreq.c
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
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
tegra20-cpufreq.c
tegra124-cpufreq.c
ti-cpufreq.c
unicore2-cpufreq.c
vexpress-spc-cpufreq.c