p71924506
/
linux_old1
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

intel_pstate: remove MSR test 

x86_match_cpu will not match our cpuid unless APERF/MPERF flag is
set, so there is no need to do the manual check for this MSR.

Signed-off-by: Kristen Carlson Accardi <kristen@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Kristen Carlson Accardi 2015-04-10 10:21:09 -07:00 committed by Rafael J. Wysocki
parent 4492d1a2e9
commit 5f97899d78
1 changed files with 0 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/cpufreq/intel_pstate.c
View File

@ -1024,25 +1024,11 @@ static unsigned int force_load;
static int intel_pstate_msrs_not_valid(void)
{
/* Check that all the msr's we are using are valid. */
u64 aperf, mperf, tmp;
rdmsrl(MSR_IA32_APERF, aperf);
rdmsrl(MSR_IA32_MPERF, mperf);
if (!pstate_funcs.get_max() ||
!pstate_funcs.get_min() ||
!pstate_funcs.get_turbo())
return -ENODEV;
rdmsrl(MSR_IA32_APERF, tmp);
if (!(tmp - aperf))
return -ENODEV;
rdmsrl(MSR_IA32_MPERF, tmp);
if (!(tmp - mperf))
return -ENODEV;
return 0;
}