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thermal/powerclamp: correct cpu support check 

Initial logic for checking CPU match resulted in OR of CPU features
rather than the intended AND.

Updated to use boot_cpu_has macro rather than x86_match_cpu.

In addition, MWAIT is the only required CPU feature for idle
injection to work.  Drop other feature requirements since they are
only needed for optimal efficiency.

CC: stable@vger.kernel.org #v4.7
Signed-off-by: Eric Ernst <eric.ernst@linux.intel.com>
Acked-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
This commit is contained in:
Eric Ernst 2016-10-06 08:56:49 -07:00 committed by Zhang Rui
parent 33086a9a30
commit 3105f234e0
1 changed files with 2 additions and 12 deletions
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14
drivers/thermal/intel_powerclamp.c
View File

@ -669,20 +669,10 @@ static struct thermal_cooling_device_ops powerclamp_cooling_ops = {
.set_cur_state = powerclamp_set_cur_state,
};
static const struct x86_cpu_id intel_powerclamp_ids[] __initconst = {
{ X86_VENDOR_INTEL, X86_FAMILY_ANY, X86_MODEL_ANY, X86_FEATURE_MWAIT },
{ X86_VENDOR_INTEL, X86_FAMILY_ANY, X86_MODEL_ANY, X86_FEATURE_ARAT },
{ X86_VENDOR_INTEL, X86_FAMILY_ANY, X86_MODEL_ANY, X86_FEATURE_NONSTOP_TSC },
{ X86_VENDOR_INTEL, X86_FAMILY_ANY, X86_MODEL_ANY, X86_FEATURE_CONSTANT_TSC},
{}
};
MODULE_DEVICE_TABLE(x86cpu, intel_powerclamp_ids);
static int __init powerclamp_probe(void)
{
if (!x86_match_cpu(intel_powerclamp_ids)) {
pr_err("Intel powerclamp does not run on family %d model %d\n",
boot_cpu_data.x86, boot_cpu_data.x86_model);
if (!boot_cpu_has(X86_FEATURE_MWAIT)) {
pr_err("CPU does not support MWAIT");
return -ENODEV;
}