diff options
| author | Srinivas Pandruvada <[email protected]> | 2019-10-31 12:26:20 -0700 |
|---|---|---|
| committer | Rafael J. Wysocki <[email protected]> | 2019-11-08 11:29:58 +0100 |
| commit | c31432fa7f825de0e19838f1ac7746381c509ec4 (patch) | |
| tree | d5f4e09003c27b0a4a7342b55d64af786570926f /tools/perf/util/trace-event-scripting.c | |
| parent | a99d8080aaf358d5d23581244e5da23b35e340b9 (diff) | |
cpufreq: intel_pstate: Fix invalid EPB setting
The max value of EPB can only be 0x0F. Attempting to set more than that
triggers an "unchecked MSR access error" warning which happens in
intel_pstate_hwp_force_min_perf() called via cpufreq stop_cpu().
However, it is not even necessary to touch the EPB from intel_pstate,
because it is restored on every CPU online by the intel_epb.c code,
so let that code do the right thing and drop the redundant (and
incorrect) EPB update from intel_pstate.
Fixes: af3b7379e2d70 ("cpufreq: intel_pstate: Force HWP min perf before offline")
Reported-by: Qian Cai <[email protected]>
Cc: 5.2+ <[email protected]> # 5.2+
Signed-off-by: Srinivas Pandruvada <[email protected]>
[ rjw: Changelog ]
Signed-off-by: Rafael J. Wysocki <[email protected]>
Diffstat (limited to 'tools/perf/util/trace-event-scripting.c')
0 files changed, 0 insertions, 0 deletions