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| author |   Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> | 2015-10-15 12:34:21 -0700 |
|---|---|---|
| committer |   Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2015-10-15 22:46:33 +0200 |
| commit | 8e601a9f97a00bab031980de34f9a81891c1f82f (patch) | |
| tree | 9116b294513ac173b61dffe4c8daa05802072d68 /drivers/cpufreq/Kconfig.x86 | |
| parent | Linux 4.3-rc5 (diff) | |
| download | linux-dev-8e601a9f97a00bab031980de34f9a81891c1f82f.tar.xz linux-dev-8e601a9f97a00bab031980de34f9a81891c1f82f.zip | |
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>
Diffstat (limited to 'drivers/cpufreq/Kconfig.x86')
0 files changed, 0 insertions, 0 deletions