TWxSoftware/twx-linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
Files
v4.4.53
twx-linux/drivers/cpufreq
T
History
Denis Kirjanov 2c1dd423a5 cpufreq: powernv: Disable preemption while checking CPU throttling state 
commit 8a10c06a20 upstream.

With preemption turned on we can read incorrect throttling state
while being switched to CPU on a different chip.

 BUG: using smp_processor_id() in preemptible [00000000] code: cat/7343
 caller is .powernv_cpufreq_throttle_check+0x2c/0x710
 CPU: 13 PID: 7343 Comm: cat Not tainted 4.8.0-rc5-dirty #1
 Call Trace:
 [c0000007d25b75b0] [c000000000971378] .dump_stack+0xe4/0x150 (unreliable)
 [c0000007d25b7640] [c0000000005162e4] .check_preemption_disabled+0x134/0x150
 [c0000007d25b76e0] [c0000000007b63ac] .powernv_cpufreq_throttle_check+0x2c/0x710
 [c0000007d25b7790] [c0000000007b6d18] .powernv_cpufreq_target_index+0x288/0x360
 [c0000007d25b7870] [c0000000007acee4] .__cpufreq_driver_target+0x394/0x8c0
 [c0000007d25b7920] [c0000000007b22ac] .cpufreq_set+0x7c/0xd0
 [c0000007d25b79b0] [c0000000007adf50] .store_scaling_setspeed+0x80/0xc0
 [c0000007d25b7a40] [c0000000007ae270] .store+0xa0/0x100
 [c0000007d25b7ae0] [c0000000003566e8] .sysfs_kf_write+0x88/0xb0
 [c0000007d25b7b70] [c0000000003553b8] .kernfs_fop_write+0x178/0x260
 [c0000007d25b7c10] [c0000000002ac3cc] .__vfs_write+0x3c/0x1c0
 [c0000007d25b7cf0] [c0000000002ad584] .vfs_write+0xc4/0x230
 [c0000007d25b7d90] [c0000000002aeef8] .SyS_write+0x58/0x100
 [c0000007d25b7e30] [c00000000000bfec] system_call+0x38/0xfc

Fixes: 09a972d162 (cpufreq: powernv: Report cpu frequency throttling)
Reviewed-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com>
Signed-off-by: Denis Kirjanov <kda@linux-powerpc.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-01-19 20:17:22 +01:00
..
acpi-cpufreq.c
cpufreq: acpi_cpufreq: prevent crash on reading freqdomain_cpus
2015-10-08 21:47:13 +02:00
amd_freq_sensitivity.c
…
arm_big_little_dt.c
PM / OPP: Prefix exported opp routines with dev_pm_opp_
2015-09-15 02:03:16 +02:00
arm_big_little.c
cpufreq: arm_big_little: fix frequency check when bL switcher is active
2015-11-02 01:58:27 +01:00
arm_big_little.h
PM / OPP: Prefix exported opp routines with dev_pm_opp_
2015-09-15 02:03:16 +02:00
at32ap-cpufreq.c
…
blackfin-cpufreq.c
…
cppc_cpufreq.c
cpufreq: CPPC: Initialize and check CPUFreq CPU co-ord type correctly
2015-11-23 22:21:18 +01:00
cpufreq_conservative.c
cpufreq: conservative: remove 'enable' field
2015-09-26 02:59:38 +02:00
cpufreq_governor.c
cpufreq: Fix NULL reference crash while accessing policy->governor_data
2016-03-03 15:07:25 -08:00
cpufreq_governor.h
cpufreq: conservative: remove 'enable' field
2015-09-26 02:59:38 +02:00
cpufreq_ondemand.c
cpufreq: ondemand: Drop unnecessary locks from update_sampling_rate()
2015-10-28 09:20:04 +01:00
cpufreq_performance.c
…
cpufreq_powersave.c
…
cpufreq_stats.c
…
cpufreq_userspace.c
cpufreq: Fix GOV_LIMITS handling for the userspace governor
2016-09-15 08:27:54 +02:00
cpufreq-dt.c
PM / OPP: Prefix exported opp routines with dev_pm_opp_
2015-09-15 02:03:16 +02:00
cpufreq-nforce2.c
…
cpufreq.c
cpufreq: use last policy after online for drivers with ->setpolicy
2015-12-02 23:50:33 +01:00
cris-artpec3-cpufreq.c
…
cris-etraxfs-cpufreq.c
…
davinci-cpufreq.c
…
dbx500-cpufreq.c
…
e_powersaver.c
…
elanfreq.c
…
exynos5440-cpufreq.c
PM / OPP: Prefix exported opp routines with dev_pm_opp_
2015-09-15 02:03:16 +02:00
freq_table.c
…
gx-suspmod.c
…
highbank-cpufreq.c
…
hisi-acpu-cpufreq.c
…
ia64-acpi-cpufreq.c
…
imx6q-cpufreq.c
Merge branch 'pm-opp'
2015-11-02 00:54:37 +01:00
integrator-cpufreq.c
cpufreq: integrator: Fix module autoload for OF platform driver
2015-09-25 23:29:35 +02:00
intel_pstate.c
cpufreq: intel_pstate: Fix unsafe HWP MSR access
2016-10-28 03:01:26 -04:00
Kconfig
…
Kconfig.arm
cpufreq: tegra: add regulator dependency for T124
2015-12-12 02:25:56 +01:00
Kconfig.powerpc
…
Kconfig.x86
Revert "cpufreq: intel_pstate: Use ACPI perf configuration"
2015-11-19 00:20:42 +01:00
kirkwood-cpufreq.c
…
longhaul.c
…
longhaul.h
…
longrun.c
…
loongson2_cpufreq.c
…
ls1x-cpufreq.c
…
Makefile
Merge tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
2015-11-10 15:00:03 -08:00
maple-cpufreq.c
…
mt8173-cpufreq.c
PM / OPP: Prefix exported opp routines with dev_pm_opp_
2015-09-15 02:03:16 +02:00
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
cpufreq: powernv: Disable preemption while checking CPU throttling state
2017-01-19 20:17:22 +01:00
ppc_cbe_cpufreq_pervasive.c
…
ppc_cbe_cpufreq_pmi.c
…
ppc_cbe_cpufreq.c
…
ppc_cbe_cpufreq.h
…
pxa2xx-cpufreq.c
cpufreq: pxa2xx: fix pxa_cpufreq_change_voltage prototype
2016-03-03 15:07:25 -08:00
pxa3xx-cpufreq.c
…
qoriq-cpufreq.c
…
s3c24xx-cpufreq-debugfs.c
…
s3c24xx-cpufreq.c
cpufreq: s3c24xx: Do not mark s3c2410_plls_add as __init
2015-11-27 10:10:32 +09:00
s3c64xx-cpufreq.c
…
s3c2410-cpufreq.c
…
s3c2412-cpufreq.c
…
s3c2416-cpufreq.c
…
s3c2440-cpufreq.c
…
s5pv210-cpufreq.c
cpufreq: s5pv210-cpufreq: fix wrong do_div() usage
2015-11-05 22:50:48 +01:00
sa1100-cpufreq.c
…
sa1110-cpufreq.c
…
sc520_freq.c
…
scpi-cpufreq.c
cpufreq: scpi-cpufreq: signedness bug in scpi_get_dvfs_info()
2015-12-24 02:11:37 +01:00
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
…
tegra20-cpufreq.c
cpufreq: tegra20: remove superfluous CONFIG_PM ifdefs
2015-09-26 03:00:57 +02:00
tegra124-cpufreq.c
…
unicore2-cpufreq.c
…
vexpress-spc-cpufreq.c
…