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Properly skip the first CPU. It only accidentally worked because the

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CPU_FOREACH() loop always starts from BSP (cpu0) and the if condition
is always false for APs.

Reported by:	cem
This commit is contained in:
Jung-uk Kim 2017-11-30 20:21:42 +00:00
parent aea6d042a9
commit 82f0844956
1 changed files with 4 additions and 6 deletions
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10
sys/x86/cpufreq/hwpstate.c
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@ -167,10 +167,8 @@ static int
hwpstate_goto_pstate(device_t dev, int id)
{
sbintime_t sbt;
int i;
uint64_t msr;
int j;
int limit;
int cpu, i, j, limit;
/* get the current pstate limit */
msr = rdmsr(MSR_AMD_10H_11H_LIMIT);
@ -178,8 +176,8 @@ hwpstate_goto_pstate(device_t dev, int id)
if (limit > id)
id = limit;
HWPSTATE_DEBUG(dev, "setting P%d-state on cpu%d\n", id,
PCPU_GET(cpuid));
cpu = curcpu;
HWPSTATE_DEBUG(dev, "setting P%d-state on cpu%d\n", id, cpu);
/* Go To Px-state */
wrmsr(MSR_AMD_10H_11H_CONTROL, id);
@ -188,7 +186,7 @@ hwpstate_goto_pstate(device_t dev, int id)
* Probably should take _PSD into account.
*/
CPU_FOREACH(i) {
if (i == PCPU_GET(cpuid))
if (i == cpu)
continue;
/* Bind to each cpu. */