diff options
| author | Len Brown <len.brown@intel.com> | 2010-05-23 01:03:29 +0400 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2010-05-28 05:07:04 +0400 |
| commit | 541adf7cd937b3895c7645406a9b060504df453b (patch) | |
| tree | 99d6b50aed68071a0aca0957f08bd1b95367fe0c | |
| parent | 752138df0dc2daaae09379c754caeb08c97905dc (diff) | |
| download | linux-541adf7cd937b3895c7645406a9b060504df453b.tar.xz | |
ACPI: allow a native cpuidle driver to displace ACPI
The ACPI driver would fail probe when it found that
another driver had previously registered with cpuidle.
But this is a natural situation, as a native hardware
cpuidle driver should be able to bind instead of ACPI,
and the ACPI processor driver should be able to handle
yielding control of C-states while still handling
P-states and T-states.
Add a KERN_DEBUG line showing when acpi_idle
does successfully register.
Signed-off-by: Len Brown <len.brown@intel.com>
| -rw-r--r-- | drivers/acpi/processor_driver.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/drivers/acpi/processor_driver.c b/drivers/acpi/processor_driver.c index 5675d9747e87..deefa8591746 100644 --- a/drivers/acpi/processor_driver.c +++ b/drivers/acpi/processor_driver.c @@ -616,7 +616,8 @@ static int __cpuinit acpi_processor_add(struct acpi_device *device) acpi_processor_get_limit_info(pr); - acpi_processor_power_init(pr, device); + if (cpuidle_get_driver() == &acpi_idle_driver) + acpi_processor_power_init(pr, device); pr->cdev = thermal_cooling_device_register("Processor", device, &processor_cooling_ops); @@ -920,9 +921,10 @@ static int __init acpi_processor_init(void) if (!acpi_processor_dir) return -ENOMEM; #endif - result = cpuidle_register_driver(&acpi_idle_driver); - if (result < 0) - goto out_proc; + + if (!cpuidle_register_driver(&acpi_idle_driver)) + printk(KERN_DEBUG "ACPI: %s registered with cpuidle\n", + acpi_idle_driver.name); result = acpi_bus_register_driver(&acpi_processor_driver); if (result < 0) @@ -941,7 +943,6 @@ static int __init acpi_processor_init(void) out_cpuidle: cpuidle_unregister_driver(&acpi_idle_driver); -out_proc: #ifdef CONFIG_ACPI_PROCFS remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir); #endif |