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linux/drivers/cpufreq
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Srinivas Pandruvada 8e601a9f97 cpufreq: intel_pstate: Fix divide by zero on Knights Landing (KNL) 
This is a workaround for KNL platform, where in some cases MPERF counter
will not have updated value before next read of MSR_IA32_MPERF. In this
case divide by zero will occur. This change ignores current sample for
busy calculation in this case.

Fixes: b34ef932d79a (intel_pstate: Knights Landing support)
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Acked-by: Kristen Carlson Accardi <kristen@linux.intel.com>
Cc: 4.1+ <stable@vger.kernel.org> # 4.1+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-10-15 22:46:33 +02:00
..
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
Driver core patches for 3.19-rc1
2014-12-14 16:10:09 -08:00
arm_big_little.c
cpufreq: arm_big_little: remove compile-time dependency on BIG_LITTLE
2015-05-15 01:53:42 +02:00
arm_big_little.h
cpufreq: arm_big_little: free OPP table created during ->init()
2014-12-02 00:01:24 +01:00
at32ap-cpufreq.c
cpufreq: at32ap: don't declare local variable as static
2014-04-07 14:31:33 +02:00
blackfin-cpufreq.c
cpufreq: Remove cpufreq_generic_exit()
2014-03-12 01:06:00 +01:00
cpufreq_conservative.c
cpufreq: governor: split out common part of {cs|od}_dbs_timer()
2015-07-21 01:12:01 +02:00
cpufreq_governor.c
cpufreq: governor: Don't WARN on invalid states
2015-07-21 01:12:02 +02:00
cpufreq_governor.h
cpufreq: governor: split out common part of {cs|od}_dbs_timer()
2015-07-21 01:12:01 +02:00
cpufreq_ondemand.c
cpufreq: governor: split out common part of {cs|od}_dbs_timer()
2015-07-21 01:12:01 +02:00
cpufreq_opp.c
cpufreq: Update boost flag while initializing freq table from OPPs
2015-08-07 03:25:23 +02:00
cpufreq_performance.c
…
cpufreq_powersave.c
…
cpufreq_stats.c
cpufreq: stats: drop unnecessary locking
2015-01-23 23:06:45 +01:00
cpufreq_userspace.c
cpufreq / governor: Remove fossil comment
2013-10-17 23:00:20 +02:00
cpufreq-dt.c
cpufreq-dt: add suspend frequency support
2015-09-09 02:22:55 +02:00
cpufreq-nforce2.c
cpufreq: nforce2: Fix typo in comment to function nforce2_init()
2015-06-15 15:45:24 +02:00
cpufreq.c
cpufreq: prevent lockup on reading scaling_available_frequencies
2015-10-08 21:47:56 +02:00
cris-artpec3-cpufreq.c
cpufreq: create another field .flags in cpufreq_frequency_table
2014-04-07 14:43:50 +02:00
cris-etraxfs-cpufreq.c
cpufreq: create another field .flags in cpufreq_frequency_table
2014-04-07 14:43:50 +02:00
davinci-cpufreq.c
cpufreq: drop owner assignment from platform_drivers
2014-10-20 16:20:24 +02:00
dbx500-cpufreq.c
cpufreq: drop owner assignment from platform_drivers
2014-10-20 16:20:24 +02:00
e_powersaver.c
ACPI / processor: Drop an unused argument of a cleanup routine
2015-07-22 22:11:16 +02:00
elanfreq.c
cpufreq: Use cpufreq_for_each_* macros for frequency table iteration
2014-04-30 00:06:21 +02:00
exynos5440-cpufreq.c
Driver core patches for 3.19-rc1
2014-12-14 16:10:09 -08:00
freq_table.c
cpufreq: Allow drivers to enable boost support after registering driver
2015-08-07 03:25:23 +02:00
gx-suspmod.c
cpufreq: gx-suspmod: Fix two typos in two comments
2015-06-15 15:46:15 +02:00
highbank-cpufreq.c
Merge branch 'mailbox-for-linus' of git://git.linaro.org/landing-teams/working/fujitsu/integration
2014-10-21 11:21:19 -07:00
hisi-acpu-cpufreq.c
cpufreq: hisilicon: add acpu driver
2015-04-02 02:24:54 +02:00
ia64-acpi-cpufreq.c
cpufreq: ia64: Fix a memory leak in acpi_cpufreq_cpu_exit()
2015-07-22 22:27:40 +02:00
imx6q-cpufreq.c
Driver core patches for 3.19-rc1
2014-12-14 16:10:09 -08:00
integrator-cpufreq.c
cpufreq: integrator: fixed coding style issues
2015-07-16 23:51:26 +02:00
intel_pstate.c
cpufreq: intel_pstate: Fix divide by zero on Knights Landing (KNL)
2015-10-15 22:46:33 +02:00
Kconfig
cpufreq: qoriq: rename the driver
2015-03-18 22:35:16 +01:00
Kconfig.arm
Additional power management and ACPI material for v4.3-rc1
2015-09-11 19:11:06 -07:00
Kconfig.powerpc
cpufreq: qoriq: rename the driver
2015-03-18 22:35:16 +01:00
Kconfig.x86
cpufreq: Add SFI based cpufreq driver support
2014-12-20 13:37:37 -05:00
kirkwood-cpufreq.c
cpufreq: drop owner assignment from platform_drivers
2014-10-20 16:20:24 +02:00
longhaul.c
Update/Remove soon-to-be-dead email address
2014-12-19 12:56:15 -08:00
longhaul.h
…
longrun.c
cpufreq: add new routine cpufreq_verify_within_cpu_limits()
2013-10-16 00:50:23 +02:00
loongson2_cpufreq.c
CPUFREQ: Loongson2: Fix broken build due to incorrect include.
2015-08-03 09:24:59 +02:00
ls1x-cpufreq.c
MIPS: Loongson: Naming style cleanup and rework
2015-06-21 21:53:59 +02:00
Makefile
ARM: SoC: late fixes and dependencies
2015-09-10 17:59:04 -07:00
maple-cpufreq.c
cpufreq: create another field .flags in cpufreq_frequency_table
2014-04-07 14:43:50 +02:00
mt8173-cpufreq.c
cpufreq: mediatek: Add MT8173 cpufreq driver
2015-09-01 15:50:20 +02:00
omap-cpufreq.c
cpufreq: drop owner assignment from platform_drivers
2014-10-20 16:20:24 +02:00
p4-clockmod.c
p4-clockmod: Replace cpu_sibling_mask() with topology_sibling_cpumask()
2015-05-27 15:22:16 +02:00
pasemi-cpufreq.c
cpufreq: Use cpufreq_for_each_* macros for frequency table iteration
2014-04-30 00:06:21 +02:00
pcc-cpufreq.c
cpufreq: pcc: Enable autoload of pcc-cpufreq for ACPI processors
2014-11-14 00:16:25 +01:00
pmac32-cpufreq.c
powerpc: Remove powerpc specific cmd_line
2014-10-02 17:33:55 +10:00
pmac64-cpufreq.c
of: Migrate of_find_node_by_name() users to for_each_node_by_name()
2014-06-26 17:12:24 +01:00
powernow-k6.c
Update/Remove soon-to-be-dead email address
2014-12-19 12:56:15 -08:00
powernow-k7.c
ACPI / processor: Drop an unused argument of a cleanup routine
2015-07-22 22:11:16 +02:00
powernow-k7.h
…
powernow-k8.c
ACPI / processor: Drop an unused argument of a cleanup routine
2015-07-22 22:11:16 +02:00
powernow-k8.h
cpufreq: powernow-k8: Suppress checkpatch warnings
2014-05-17 01:27:01 +02:00
powernv-cpufreq.c
cpufreq: powernv: Increase the verbosity of OCC console messages
2015-09-01 15:51:25 +02:00
ppc_cbe_cpufreq_pervasive.c
…
ppc_cbe_cpufreq_pmi.c
cpufreq: remove redundant CPUFREQ_INCOMPATIBLE notifier event
2015-09-01 15:50:38 +02:00
ppc_cbe_cpufreq.c
cpufreq: Use cpufreq_for_each_* macros for frequency table iteration
2014-04-30 00:06:21 +02:00
ppc_cbe_cpufreq.h
…
pxa2xx-cpufreq.c
cpufreq: pxa: make pxa_freqs arrays const
2015-05-05 00:49:38 +02:00
pxa3xx-cpufreq.c
cpufreq: Remove cpufreq_generic_exit()
2014-03-12 01:06:00 +01:00
qoriq-cpufreq.c
cpufreq: qoriq: optimize the CPU frequency switching time
2015-06-15 15:47:28 +02:00
s3c24xx-cpufreq-debugfs.c
…
s3c24xx-cpufreq.c
cpufreq: s3c: remove last use of resume_clocks callback
2015-02-19 06:36:53 +01:00
s3c64xx-cpufreq.c
cpufreq: Use cpufreq_for_each_* macros for frequency table iteration
2014-04-30 00:06:21 +02:00
s3c2410-cpufreq.c
cpufreq: s3c24xx: Remove some dead code
2014-07-19 04:24:59 +09:00
s3c2412-cpufreq.c
cpufreq: s3c24xx: Remove some dead code
2014-07-19 04:24:59 +09:00
s3c2416-cpufreq.c
cpufreq: s3c: remove incorrect __init annotations
2015-02-19 06:36:53 +01:00
s3c2440-cpufreq.c
cpufreq: s3c24xx: Remove some dead code
2014-07-19 04:24:59 +09:00
s5pv210-cpufreq.c
drivers/cpufreq: Convert non-modular s5pv210-cpufreq.c to use builtin_platform_driver
2015-06-16 14:12:38 -04:00
sa1100-cpufreq.c
cpufreq: Mark ARM drivers with CPUFREQ_NEED_INITIAL_FREQ_CHECK flag
2014-01-06 14:17:25 +01:00
sa1110-cpufreq.c
cpufreq: sa1110: set memory type for h3600
2014-07-16 14:30:17 +02:00
sc520_freq.c
cpufreq: create another field .flags in cpufreq_frequency_table
2014-04-07 14:43:50 +02:00
sfi-cpufreq.c
cpufreq: sfi: use kmemdup rather than duplicating its implementation
2015-09-01 15:51:15 +02:00
sh-cpufreq.c
cpufreq: Convert existing drivers to use cpufreq_freq_transition_{begin|end}
2014-03-26 16:41:41 +01:00
sparc-us2e-cpufreq.c
cpufreq: add 'freq_table' in struct cpufreq_policy
2014-03-12 01:06:00 +01:00
sparc-us3-cpufreq.c
cpufreq: add 'freq_table' in struct cpufreq_policy
2014-03-12 01:06:00 +01:00
spear-cpufreq.c
cpufreq: drop owner assignment from platform_drivers
2014-10-20 16:20:24 +02:00
speedstep-centrino.c
cpufreq: Make linux-pm@vger.kernel.org official mailing list
2014-05-01 01:15:32 +02:00
speedstep-ich.c
speedstep-ich: Replace cpu_sibling_mask() with topology_sibling_cpumask()
2015-05-27 15:22:16 +02:00
speedstep-lib.c
cpufreq: speedstep-lib: Use monotonic clock
2015-09-01 15:51:43 +02:00
speedstep-lib.h
…
speedstep-smi.c
cpufreq: speedstep-smi: enable interrupts when waiting
2015-02-12 02:02:52 +01:00
tegra20-cpufreq.c
cpufreq: tegra: Rename tegra-cpufreq to tegra20-cpufreq
2015-07-16 09:34:08 +02:00
tegra124-cpufreq.c
cpufreq: Add cpufreq driver for Tegra124
2015-07-16 09:34:09 +02:00
unicore2-cpufreq.c
cpufreq: unicore32: replace IS_ERR and PTR_ERR with PTR_ERR_OR_ZERO
2014-04-21 23:42:27 +02:00
vexpress-spc-cpufreq.c
cpufreq: drop owner assignment from platform_drivers
2014-10-20 16:20:24 +02:00