diff options
| 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/sh-cpufreq.c | |
| parent | 25cb62b76430a91cc6195f902e61c2cb84ade622 (diff) | |
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/sh-cpufreq.c')
0 files changed, 0 insertions, 0 deletions