diff options
Diffstat (limited to 'drivers/idle/intel_idle.c')
| -rw-r--r-- | drivers/idle/intel_idle.c | 29 |
1 files changed, 14 insertions, 15 deletions
diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c index 170ab8e01075..5300f2545e2a 100644 --- a/drivers/idle/intel_idle.c +++ b/drivers/idle/intel_idle.c @@ -1187,6 +1187,9 @@ static unsigned long long irtl_2_usec(unsigned long long irtl) { unsigned long long ns; + if (!irtl) + return 0; + ns = irtl_ns_units[(irtl >> 10) & 0x3]; return div64_u64((irtl & 0x3FF) * ns, 1000); @@ -1200,43 +1203,39 @@ static unsigned long long irtl_2_usec(unsigned long long irtl) static void bxt_idle_state_table_update(void) { unsigned long long msr; + unsigned int usec; rdmsrl(MSR_PKGC6_IRTL, msr); - if (msr) { - unsigned int usec = irtl_2_usec(msr); - + usec = irtl_2_usec(msr); + if (usec) { bxt_cstates[2].exit_latency = usec; bxt_cstates[2].target_residency = usec; } rdmsrl(MSR_PKGC7_IRTL, msr); - if (msr) { - unsigned int usec = irtl_2_usec(msr); - + usec = irtl_2_usec(msr); + if (usec) { bxt_cstates[3].exit_latency = usec; bxt_cstates[3].target_residency = usec; } rdmsrl(MSR_PKGC8_IRTL, msr); - if (msr) { - unsigned int usec = irtl_2_usec(msr); - + usec = irtl_2_usec(msr); + if (usec) { bxt_cstates[4].exit_latency = usec; bxt_cstates[4].target_residency = usec; } rdmsrl(MSR_PKGC9_IRTL, msr); - if (msr) { - unsigned int usec = irtl_2_usec(msr); - + usec = irtl_2_usec(msr); + if (usec) { bxt_cstates[5].exit_latency = usec; bxt_cstates[5].target_residency = usec; } rdmsrl(MSR_PKGC10_IRTL, msr); - if (msr) { - unsigned int usec = irtl_2_usec(msr); - + usec = irtl_2_usec(msr); + if (usec) { bxt_cstates[6].exit_latency = usec; bxt_cstates[6].target_residency = usec; } |