Viresh Kumar 92c14bd947 cpufreq: move policy kobj to policy->cpu at resume ... 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: 42f921a6f1 (cpufreq: remove sysfs files for CPUs which failed to come back after resume) Cc: 3.13+ <stable@vger.kernel.org> # 3.13+ 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>		2014-07-17 14:23:22 +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
cpufreq_conservative.c
cpufreq_governor.c	cpufreq: governor: remove copy_prev_load from 'struct cpu_dbs_common_info'	2014-06-09 12:58:21 +02:00
cpufreq_governor.h	cpufreq: governor: remove copy_prev_load from 'struct cpu_dbs_common_info'	2014-06-09 12:58:21 +02:00
cpufreq_ondemand.c
cpufreq_opp.c
cpufreq_performance.c
cpufreq_powersave.c
cpufreq_stats.c
cpufreq_userspace.c
cpufreq-cpu0.c	cpufreq: cpu0: OPPs can be populated at runtime	2014-07-16 15:12:52 +02:00
cpufreq-nforce2.c
cpufreq.c	cpufreq: move policy kobj to policy->cpu at resume	2014-07-17 14:23:22 +02:00
cris-artpec3-cpufreq.c
cris-etraxfs-cpufreq.c
davinci-cpufreq.c
dbx500-cpufreq.c
e_powersaver.c
elanfreq.c
exynos4x12-cpufreq.c
exynos4210-cpufreq.c
exynos5250-cpufreq.c
exynos5440-cpufreq.c
exynos-cpufreq.c
exynos-cpufreq.h
freq_table.c
gx-suspmod.c
highbank-cpufreq.c
ia64-acpi-cpufreq.c
imx6q-cpufreq.c
integrator-cpufreq.c
intel_pstate.c	intel_pstate: Set CPU number before accessing MSRs	2014-07-07 01:24:24 +02:00
Kconfig	cpufreq: cpufreq-cpu0: fix CPU_THERMAL dependency	2014-06-16 22:33:38 +02:00
Kconfig.arm	cpufreq: kirkwood: Reinstate cpufreq driver for ARCH_KIRKWOOD	2014-07-16 15:12:03 +02:00
Kconfig.powerpc
Kconfig.x86
kirkwood-cpufreq.c
longhaul.c
longhaul.h
longrun.c
loongson2_cpufreq.c
Makefile	cpufreq: Makefile: fix compilation for davinci platform	2014-07-09 02:54:15 +02:00
maple-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
ppc-corenet-cpufreq.c	cpufreq: ppc-corenet-cpu-freq: do_div use quotient	2014-06-06 22:50:43 +02:00
pxa2xx-cpufreq.c
pxa3xx-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	cpufreq: sa1110: set memory type for h3600	2014-07-16 14:30:17 +02:00
sc520_freq.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
tegra-cpufreq.c	cpufreq: tegra: update comment for clarity	2014-06-10 22:50:50 +02:00
unicore2-cpufreq.c
vexpress-spc-cpufreq.c