diff options
| -rw-r--r-- | arch/x86/kernel/cpu/cpufreq/pcc-cpufreq.c | 41 | ||||
| -rw-r--r-- | arch/x86/kernel/cpu/cpufreq/powernow-k8.c | 11 | ||||
| -rw-r--r-- | drivers/cpufreq/cpufreq.c | 12 |
3 files changed, 27 insertions, 37 deletions
diff --git a/arch/x86/kernel/cpu/cpufreq/pcc-cpufreq.c b/arch/x86/kernel/cpu/cpufreq/pcc-cpufreq.c index ce7cde713e71..a36de5bbb622 100644 --- a/arch/x86/kernel/cpu/cpufreq/pcc-cpufreq.c +++ b/arch/x86/kernel/cpu/cpufreq/pcc-cpufreq.c @@ -368,22 +368,16 @@ static int __init pcc_cpufreq_do_osc(acpi_handle *handle) return -ENODEV; out_obj = output.pointer; - if (out_obj->type != ACPI_TYPE_BUFFER) { - ret = -ENODEV; - goto out_free; - } + if (out_obj->type != ACPI_TYPE_BUFFER) + return -ENODEV; errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0); - if (errors) { - ret = -ENODEV; - goto out_free; - } + if (errors) + return -ENODEV; supported = *((u32 *)(out_obj->buffer.pointer + 4)); - if (!(supported & 0x1)) { - ret = -ENODEV; - goto out_free; - } + if (!(supported & 0x1)) + return -ENODEV; out_free: kfree(output.pointer); @@ -397,13 +391,17 @@ static int __init pcc_cpufreq_probe(void) struct pcc_memory_resource *mem_resource; struct pcc_register_resource *reg_resource; union acpi_object *out_obj, *member; - acpi_handle handle, osc_handle; + acpi_handle handle, osc_handle, pcch_handle; int ret = 0; status = acpi_get_handle(NULL, "\\_SB", &handle); if (ACPI_FAILURE(status)) return -ENODEV; + status = acpi_get_handle(handle, "PCCH", &pcch_handle); + if (ACPI_FAILURE(status)) + return -ENODEV; + status = acpi_get_handle(handle, "_OSC", &osc_handle); if (ACPI_SUCCESS(status)) { ret = pcc_cpufreq_do_osc(&osc_handle); @@ -543,13 +541,13 @@ static int pcc_cpufreq_cpu_init(struct cpufreq_policy *policy) if (!pcch_virt_addr) { result = -1; - goto pcch_null; + goto out; } result = pcc_get_offset(cpu); if (result) { dprintk("init: PCCP evaluation failed\n"); - goto free; + goto out; } policy->max = policy->cpuinfo.max_freq = @@ -558,14 +556,15 @@ static int pcc_cpufreq_cpu_init(struct cpufreq_policy *policy) ioread32(&pcch_hdr->minimum_frequency) * 1000; policy->cur = pcc_get_freq(cpu); + if (!policy->cur) { + dprintk("init: Unable to get current CPU frequency\n"); + result = -EINVAL; + goto out; + } + dprintk("init: policy->max is %d, policy->min is %d\n", policy->max, policy->min); - - return 0; -free: - pcc_clear_mapping(); - free_percpu(pcc_cpu_info); -pcch_null: +out: return result; } diff --git a/arch/x86/kernel/cpu/cpufreq/powernow-k8.c b/arch/x86/kernel/cpu/cpufreq/powernow-k8.c index 7ec2123838e6..3e90cce3dc8b 100644 --- a/arch/x86/kernel/cpu/cpufreq/powernow-k8.c +++ b/arch/x86/kernel/cpu/cpufreq/powernow-k8.c @@ -1023,13 +1023,12 @@ static int get_transition_latency(struct powernow_k8_data *data) } if (max_latency == 0) { /* - * Fam 11h always returns 0 as transition latency. - * This is intended and means "very fast". While cpufreq core - * and governors currently can handle that gracefully, better - * set it to 1 to avoid problems in the future. - * For all others it's a BIOS bug. + * Fam 11h and later may return 0 as transition latency. This + * is intended and means "very fast". While cpufreq core and + * governors currently can handle that gracefully, better set it + * to 1 to avoid problems in the future. */ - if (boot_cpu_data.x86 != 0x11) + if (boot_cpu_data.x86 < 0x11) printk(KERN_ERR FW_WARN PFX "Invalid zero transition " "latency\n"); max_latency = 1; diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index 063b2184caf5..938b74ea9ffb 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -1077,6 +1077,7 @@ err_out_unregister: err_unlock_policy: unlock_policy_rwsem_write(cpu); + free_cpumask_var(policy->related_cpus); err_free_cpumask: free_cpumask_var(policy->cpus); err_free_policy: @@ -1762,17 +1763,8 @@ static int __cpufreq_set_policy(struct cpufreq_policy *data, dprintk("governor switch\n"); /* end old governor */ - if (data->governor) { - /* - * Need to release the rwsem around governor - * stop due to lock dependency between - * cancel_delayed_work_sync and the read lock - * taken in the delayed work handler. - */ - unlock_policy_rwsem_write(data->cpu); + if (data->governor) __cpufreq_governor(data, CPUFREQ_GOV_STOP); - lock_policy_rwsem_write(data->cpu); - } /* start new governor */ data->governor = policy->governor; |
