diff options
| -rw-r--r-- | drivers/platform/x86/intel-uncore-frequency.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/drivers/platform/x86/intel-uncore-frequency.c b/drivers/platform/x86/intel-uncore-frequency.c index 2b1a0734c3f8..c83ec95e8f3e 100644 --- a/drivers/platform/x86/intel-uncore-frequency.c +++ b/drivers/platform/x86/intel-uncore-frequency.c @@ -97,6 +97,9 @@ static int uncore_read_ratio(struct uncore_data *data, unsigned int *min, u64 cap; int ret; + if (data->control_cpu < 0) + return -ENXIO; + ret = rdmsrl_on_cpu(data->control_cpu, MSR_UNCORE_RATIO_LIMIT, &cap); if (ret) return ret; @@ -116,6 +119,11 @@ static int uncore_write_ratio(struct uncore_data *data, unsigned int input, mutex_lock(&uncore_lock); + if (data->control_cpu < 0) { + ret = -ENXIO; + goto finish_write; + } + input /= UNCORE_FREQ_KHZ_MULTIPLIER; if (!input || input > 0x7F) { ret = -EINVAL; @@ -273,18 +281,15 @@ static void uncore_add_die_entry(int cpu) mutex_unlock(&uncore_lock); } -/* Last CPU in this die is offline, so remove sysfs entries */ +/* Last CPU in this die is offline, make control cpu invalid */ static void uncore_remove_die_entry(int cpu) { struct uncore_data *data; mutex_lock(&uncore_lock); data = uncore_get_instance(cpu); - if (data) { - kobject_put(&data->kobj); + if (data) data->control_cpu = -1; - data->valid = false; - } mutex_unlock(&uncore_lock); } |