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| author |   Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> | 2019-10-31 12:26:20 -0700 |
|---|---|---|
| committer |   Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2019-11-08 11:29:58 +0100 |
| commit | c31432fa7f825de0e19838f1ac7746381c509ec4 (patch) | |
| tree | d5f4e09003c27b0a4a7342b55d64af786570926f /drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | |
| parent | Linux 5.4-rc6 (diff) | |
| download | linux-dev-c31432fa7f825de0e19838f1ac7746381c509ec4.tar.xz linux-dev-c31432fa7f825de0e19838f1ac7746381c509ec4.zip | |
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 <cai@lca.pw>
Cc: 5.2+ <stable@vger.kernel.org> # 5.2+
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
[ rjw: Changelog ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c')
0 files changed, 0 insertions, 0 deletions