diff options
Diffstat (limited to 'drivers/powercap')
| -rw-r--r-- | drivers/powercap/dtpm_cpu.c | 2 | ||||
| -rw-r--r-- | drivers/powercap/intel_rapl_common.c | 18 |
2 files changed, 19 insertions, 1 deletions
diff --git a/drivers/powercap/dtpm_cpu.c b/drivers/powercap/dtpm_cpu.c index 6b6f51b21550..99390ec1481f 100644 --- a/drivers/powercap/dtpm_cpu.c +++ b/drivers/powercap/dtpm_cpu.c @@ -96,6 +96,8 @@ static u64 get_pd_power_uw(struct dtpm *dtpm) int i; pd = em_cpu_get(dtpm_cpu->cpu); + if (!pd) + return 0; pd_mask = em_span_cpus(pd); diff --git a/drivers/powercap/intel_rapl_common.c b/drivers/powercap/intel_rapl_common.c index 5e793b80fd6b..c3de52e78e01 100644 --- a/drivers/powercap/intel_rapl_common.c +++ b/drivers/powercap/intel_rapl_common.c @@ -340,12 +340,28 @@ static int set_domain_enable(struct powercap_zone *power_zone, bool mode) { struct rapl_domain *rd = power_zone_to_rapl_domain(power_zone); struct rapl_defaults *defaults = get_defaults(rd->rp); + u64 val; int ret; cpus_read_lock(); ret = rapl_write_pl_data(rd, POWER_LIMIT1, PL_ENABLE, mode); - if (!ret && defaults->set_floor_freq) + if (ret) + goto end; + + ret = rapl_read_pl_data(rd, POWER_LIMIT1, PL_ENABLE, false, &val); + if (ret) + goto end; + + if (mode != val) { + pr_debug("%s cannot be %s\n", power_zone->name, + str_enabled_disabled(mode)); + goto end; + } + + if (defaults->set_floor_freq) defaults->set_floor_freq(rd, mode); + +end: cpus_read_unlock(); return ret; |