Viresh Kumar fd31ee0ab7 cpufreq: move policy kobj to policy->cpu at resume ... commit 92c14bd9477a20a83144f08c0ca25b0308bf0730 upstream. This is only relevant to implementations with multiple clusters, where clusters have separate clock lines but all CPUs within a cluster share it. Consider a dual cluster platform with 2 cores per cluster. During suspend we start hot unplugging CPUs in order 1 to 3. When CPU2 is removed, policy->kobj would be moved to CPU3 and when CPU3 goes down we wouldn't free policy or its kobj as we want to retain permissions/values/etc. Now on resume, we will get CPU2 before CPU3 and will call __cpufreq_add_dev(). We will recover the old policy and update policy->cpu from 3 to 2 from update_policy_cpu(). But the kobj is still tied to CPU3 and isn't moved to CPU2. We wouldn't create a link for CPU2, but would try that for CPU3 while bringing it online. Which will report errors as CPU3 already has kobj assigned to it. This bug got introduced with commit 42f921a, which overlooked this scenario. To fix this, lets move kobj to the new policy->cpu while bringing first CPU of a cluster back. Also do a WARN_ON() if kobject_move failed, as we would reach here only for the first CPU of a non-boot cluster. And we can't recover from this situation, if kobject_move() fails. Fixes: 42f921a6f10c (cpufreq: remove sysfs files for CPUs which failed to come back after resume) Reported-and-tested-by: Bu Yitian <ybu@qti.qualcomm.com> Reported-by: Saravana Kannan <skannan@codeaurora.org> Reviewed-by: Srivatsa S. Bhat <srivatsa@mit.edu> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Jiri Slaby <jslaby@suse.cz>		2017-04-11 08:04:30 +02:00
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acpi-cpufreq.c	acpi-cpufreq: Fail initialization if driver cannot be registered	2013-10-25 16:22:47 +02:00
amd_freq_sensitivity.c	cpufreq: AMD "frequency sensitivity feedback" powersave bias for ondemand governor	2013-04-10 13:19:26 +02:00
arm_big_little_dt.c	cpufreq: arm_big_little: remove device tree parsing for cpu nodes	2013-08-21 10:29:55 +01:00
arm_big_little.c	cpufreq: arm-big-little: call CPUFREQ_POSTCHANGE notfier in error cases	2013-06-24 18:18:58 +05:30
arm_big_little.h	cpufreq: ARM big LITTLE: Move cpu_to_cluster() to arm_big_little.h	2013-05-12 14:04:15 +02:00
at32ap-cpufreq.c	cpufreq: Drop the owner field from struct cpufreq_driver	2013-08-10 03:24:47 +02:00
blackfin-cpufreq.c	cpufreq: Drop the owner field from struct cpufreq_driver	2013-08-10 03:24:47 +02:00
cpufreq_conservative.c	cpufreq: governors: Remove duplicate check of target freq in supported range	2013-08-28 22:03:02 +02:00
cpufreq_governor.c	cpufreq: remove race while accessing cur_policy	2014-06-20 17:34:00 +02:00
cpufreq_governor.h	cpufreq: governor: Fix typos in comments	2013-08-28 22:04:54 +02:00
cpufreq_ondemand.c	cpufreq: governors: Remove duplicate check of target freq in supported range	2013-08-28 22:03:02 +02:00
cpufreq_performance.c	cpufreq: Clean up header files included in the core	2013-08-07 23:34:09 +02:00
cpufreq_powersave.c	cpufreq: Clean up header files included in the core	2013-08-07 23:34:09 +02:00
cpufreq_stats.c	cpufreq: Fix wrong time unit conversion	2013-09-10 02:49:46 +02:00
cpufreq_userspace.c	cpufreq: Fix GOV_LIMITS handling for the userspace governor	2016-09-29 11:14:17 +02:00
cpufreq-cpu0.c	cpufreq: cpufreq-cpu0: NULL is a valid regulator, part 2	2013-09-30 20:08:59 +02:00
cpufreq-nforce2.c	cpufreq: Drop the owner field from struct cpufreq_driver	2013-08-10 03:24:47 +02:00
cpufreq.c	cpufreq: move policy kobj to policy->cpu at resume	2017-04-11 08:04:30 +02:00
cris-artpec3-cpufreq.c	cpufreq: Drop the owner field from struct cpufreq_driver	2013-08-10 03:24:47 +02:00
cris-etraxfs-cpufreq.c	cpufreq: Drop the owner field from struct cpufreq_driver	2013-08-10 03:24:47 +02:00
davinci-cpufreq.c	cpufreq: davinci: call CPUFREQ_POSTCHANGE notfier in error cases	2013-06-24 18:18:58 +05:30
dbx500-cpufreq.c	cpufreq: delete __cpuinit usage from all cpufreq files	2013-07-14 19:36:57 -04:00
e_powersaver.c	cpufreq: Drop the owner field from struct cpufreq_driver	2013-08-10 03:24:47 +02:00
elanfreq.c	cpufreq: Drop the owner field from struct cpufreq_driver	2013-08-10 03:24:47 +02:00
exynos-cpufreq.c	Merge branch 'cpufreq-fixes' of git://git.linaro.org/people/vireshk/linux into pm-cpufreq	2013-08-14 22:22:57 +02:00
exynos-cpufreq.h	cpufreq: fix EXYNOS drivers selection	2013-08-12 12:00:21 +05:30
exynos4x12-cpufreq.c	arm-soc: cleanups	2013-02-21 14:58:40 -08:00
exynos4210-cpufreq.c	arm-soc: cleanups	2013-02-21 14:58:40 -08:00
exynos5250-cpufreq.c	arm-soc: cleanups	2013-02-21 14:58:40 -08:00
exynos5440-cpufreq.c	cpufreq: exynos5440: Fix potential NULL pointer dereference	2013-09-25 03:25:58 +02:00
freq_table.c	cpufreq: Clean up header files included in the core	2013-08-07 23:34:09 +02:00
gx-suspmod.c	cpufreq / gx: Fix gx_detect_chipset() __init attribute location	2013-08-14 22:24:23 +02:00
highbank-cpufreq.c	cpufreq: highbank-cpufreq: Enable Midway/ECX-2000	2013-12-04 11:06:14 -08:00
ia64-acpi-cpufreq.c	cpufreq: Drop the owner field from struct cpufreq_driver	2013-08-10 03:24:47 +02:00
imx6q-cpufreq.c	cpufreq: imx6q-cpufreq: assign cpu_dev correctly to cpu0 device	2013-09-19 03:53:43 +02:00
integrator-cpufreq.c	cpufreq: integrator: move cpufreq driver to drivers/cpufreq	2013-04-08 13:02:31 +02:00
intel_pstate.c	intel_pstate: Use del_timer_sync in intel_pstate_cpu_stop	2016-04-11 16:43:52 +02:00
Kconfig	cpufreq: Fix incorrect dependecies for ARM SA11xx drivers	2013-05-12 14:04:16 +02:00
Kconfig.arm	cpufreq: fix EXYNOS drivers selection	2013-08-12 12:00:21 +05:30
Kconfig.powerpc	Merge branch 'pm-cpufreq-assorted' into pm-cpufreq	2013-06-27 21:46:45 +02:00
Kconfig.x86	cpufreq: X86_AMD_FREQ_SENSITIVITY: select CPU_FREQ_TABLE	2013-06-18 13:53:11 +05:30
kirkwood-cpufreq.c	Merge branch 'cpu_of_node' of git://linux-arm.org/linux-skn into pm-cpufreq-next	2013-08-23 00:57:19 +02:00
longhaul.c	cpufreq: Drop the owner field from struct cpufreq_driver	2013-08-10 03:24:47 +02:00
longhaul.h	cpufreq: delete __cpuinit usage from all cpufreq files	2013-07-14 19:36:57 -04:00
longrun.c	cpufreq: Drop the owner field from struct cpufreq_driver	2013-08-10 03:24:47 +02:00
loongson2_cpufreq.c	Merge back earlier 'pm-cpufreq' material	2013-08-14 22:21:16 +02:00
Makefile	cpufreq: Makefile: fix compilation for davinci platform	2014-07-18 15:51:21 +02:00
maple-cpufreq.c	Merge branch 'cpu_of_node' of git://linux-arm.org/linux-skn into pm-cpufreq-next	2013-08-23 00:57:19 +02:00
omap-cpufreq.c	cpufreq: delete __cpuinit usage from all cpufreq files	2013-07-14 19:36:57 -04:00
p4-clockmod.c	cpufreq: Drop the owner field from struct cpufreq_driver	2013-08-10 03:24:47 +02:00
pasemi-cpufreq.c	cpufreq: Drop the owner field from struct cpufreq_driver	2013-08-10 03:24:47 +02:00
pcc-cpufreq.c	cpufreq: pcc: Enable autoload of pcc-cpufreq for ACPI processors	2015-06-23 15:56:21 +02:00
pmac32-cpufreq.c	Merge branch 'cpu_of_node' of git://linux-arm.org/linux-skn into pm-cpufreq-next	2013-08-23 00:57:19 +02:00
pmac64-cpufreq.c	Merge branch 'cpu_of_node' of git://linux-arm.org/linux-skn into pm-cpufreq-next	2013-08-23 00:57:19 +02:00
powernow-k6.c	powernow-k6: reorder frequencies	2014-04-13 16:22:21 +02:00
powernow-k7.c	cpufreq: Drop the owner field from struct cpufreq_driver	2013-08-10 03:24:47 +02:00
powernow-k7.h	[CPUFREQ] Move x86 drivers to drivers/cpufreq/	2011-05-19 18:51:07 -04:00
powernow-k8.c	cpufreq: powernow-k8: Initialize per-cpu data-structures properly	2014-03-05 17:13:46 +01:00
powernow-k8.h	cpufreq: Remove support for hardware P-state chips from powernow-k8	2012-09-09 22:05:30 +02:00
ppc_cbe_cpufreq_pervasive.c	cpufreq: powerpc/platforms/cell: move cpufreq driver to drivers/cpufreq	2013-04-10 13:19:26 +02:00
ppc_cbe_cpufreq_pmi.c	cpufreq: powerpc/platforms/cell: move cpufreq driver to drivers/cpufreq	2013-04-10 13:19:26 +02:00
ppc_cbe_cpufreq.c	cpufreq: Drop the owner field from struct cpufreq_driver	2013-08-10 03:24:47 +02:00
ppc_cbe_cpufreq.h	cpufreq: powerpc/platforms/cell: move cpufreq driver to drivers/cpufreq	2013-04-10 13:19:26 +02:00
ppc-corenet-cpufreq.c	cpufreq: Drop the owner field from struct cpufreq_driver	2013-08-10 03:24:47 +02:00
pxa2xx-cpufreq.c	cpufreq / pxa2xx: Fix pxa_cpufreq_init_voltages() __init attribute location	2013-08-14 22:24:23 +02:00
pxa3xx-cpufreq.c	pxa3xx-cpufreq.c: Avoid using ARRAY_AND_SIZE(e) as a function argument	2013-08-14 22:24:23 +02:00
s3c24xx-cpufreq-debugfs.c	cpufreq: s3c24xx: move cpufreq driver to drivers/cpufreq	2013-05-20 23:04:28 +09:00
s3c24xx-cpufreq.c	cpufreq: s3c: remove incorrect __init annotations	2015-03-01 23:34:15 +01:00
s3c64xx-cpufreq.c	cpufreq: s3c64xx: Rename index to driver_data	2013-10-16 23:53:38 +02:00
s3c2410-cpufreq.c	cpufreq: s3c24xx: move cpufreq driver to drivers/cpufreq	2013-05-20 23:04:28 +09:00
s3c2412-cpufreq.c	cpufreq: s3c24xx: move cpufreq driver to drivers/cpufreq	2013-05-20 23:04:28 +09:00
s3c2416-cpufreq.c	cpufreq: s3c: remove incorrect __init annotations	2015-03-01 23:34:15 +01:00
s3c2440-cpufreq.c	cpufreq: s3c24xx: move cpufreq driver to drivers/cpufreq	2013-05-20 23:04:28 +09:00
s5pv210-cpufreq.c	cpufreq: Notify all policy->cpus in cpufreq_notify_transition()	2013-04-02 15:24:00 +02:00
sa1100-cpufreq.c	cpufreq: sa11x0: move cpufreq driver to drivers/cpufreq	2013-04-10 13:19:24 +02:00
sa1110-cpufreq.c	cpufreq: sa11x0: move cpufreq driver to drivers/cpufreq	2013-04-10 13:19:24 +02:00
sc520_freq.c	cpufreq: Drop the owner field from struct cpufreq_driver	2013-08-10 03:24:47 +02:00
sh-cpufreq.c	cpufreq: Drop the owner field from struct cpufreq_driver	2013-08-10 03:24:47 +02:00
sparc-us2e-cpufreq.c	cpufreq: Drop the owner field from struct cpufreq_driver	2013-08-10 03:24:47 +02:00
sparc-us3-cpufreq.c	cpufreq: Drop the owner field from struct cpufreq_driver	2013-08-10 03:24:47 +02:00
spear-cpufreq.c	cpufreq: SPEAr: Fix incorrect variable type	2013-09-30 20:05:43 +02:00
speedstep-centrino.c	cpufreq: Drop the owner field from struct cpufreq_driver	2013-08-10 03:24:47 +02:00
speedstep-ich.c	cpufreq: Drop the owner field from struct cpufreq_driver	2013-08-10 03:24:47 +02:00
speedstep-lib.c	cpufreq: speedstep-smi: enable interrupts when waiting	2015-03-01 23:34:15 +01:00
speedstep-lib.h	[CPUFREQ] Move x86 drivers to drivers/cpufreq/	2011-05-19 18:51:07 -04:00
speedstep-smi.c	cpufreq: speedstep-smi: enable interrupts when waiting	2015-03-01 23:34:15 +01:00
tegra-cpufreq.c	cpufreq: tegra: fix the wrong clock name	2013-08-23 21:58:28 +05:30
unicore2-cpufreq.c	cpufreq: unicore2: Staticize local symbol	2013-08-14 22:24:24 +02:00