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ACPI / PNP: Use ACPI_COMPANION() instead of ACPI_HANDLE()

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The ACPI_HANDLE() macro evaluates ACPI_COMPANION() internally to
return the handle of the device's ACPI companion, so it is much
more straightforward and efficient to use ACPI_COMPANION()
directly to obtain the device's ACPI companion object instead of
using ACPI_HANDLE() and acpi_bus_get_device() on the returned
handle for the same thing.

Do that in several places in the ACPI PNP core code.

Also use acpi_device_set_power() and acpi_device_power_manageable()
instead of acpi_bus_set_power() and acpi_bus_power_manageable(),
respectively, because the former two are more efficient if the
ACPI device object is already available.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Rafael J. Wysocki 2014-07-23 01:03:06 +02:00
parent f1b1dc845c
commit e70dba6020
1 changed files with 23 additions and 28 deletions
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51
drivers/pnp/pnpacpi/core.c
View file

@ -67,8 +67,8 @@ static int pnpacpi_set_resources(struct pnp_dev *dev)
pnp_dbg(&dev->dev, "set resources\n");
handle = ACPI_HANDLE(&dev->dev);
if (!handle || acpi_bus_get_device(handle, &acpi_dev)) {
acpi_dev = ACPI_COMPANION(&dev->dev);
if (!acpi_dev) {
dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__);
return -ENODEV;
}
@ -76,6 +76,7 @@ static int pnpacpi_set_resources(struct pnp_dev *dev)
if (WARN_ON_ONCE(acpi_dev != dev->data))
dev->data = acpi_dev;
handle = acpi_dev->handle;
if (acpi_has_method(handle, METHOD_NAME__SRS)) {
struct acpi_buffer buffer;
@ -93,8 +94,8 @@ static int pnpacpi_set_resources(struct pnp_dev *dev)
}
kfree(buffer.pointer);
}
if (!ret && acpi_bus_power_manageable(handle))
ret = acpi_bus_set_power(handle, ACPI_STATE_D0);
if (!ret && acpi_device_power_manageable(acpi_dev))
ret = acpi_device_set_power(acpi_dev, ACPI_STATE_D0);
return ret;
}
@ -102,23 +103,22 @@ static int pnpacpi_set_resources(struct pnp_dev *dev)
static int pnpacpi_disable_resources(struct pnp_dev *dev)
{
struct acpi_device *acpi_dev;
acpi_handle handle;
acpi_status status;
dev_dbg(&dev->dev, "disable resources\n");
handle = ACPI_HANDLE(&dev->dev);
if (!handle || acpi_bus_get_device(handle, &acpi_dev)) {
acpi_dev = ACPI_COMPANION(&dev->dev);
if (!acpi_dev) {
dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__);
return 0;
}
/* acpi_unregister_gsi(pnp_irq(dev, 0)); */
if (acpi_bus_power_manageable(handle))
acpi_bus_set_power(handle, ACPI_STATE_D3_COLD);
if (acpi_device_power_manageable(acpi_dev))
acpi_device_set_power(acpi_dev, ACPI_STATE_D3_COLD);
/* continue even if acpi_bus_set_power() fails */
status = acpi_evaluate_object(handle, "_DIS", NULL, NULL);
/* continue even if acpi_device_set_power() fails */
status = acpi_evaluate_object(acpi_dev->handle, "_DIS", NULL, NULL);
if (ACPI_FAILURE(status) && status != AE_NOT_FOUND)
return -ENODEV;
@ -128,26 +128,22 @@ static int pnpacpi_disable_resources(struct pnp_dev *dev)
#ifdef CONFIG_ACPI_SLEEP
static bool pnpacpi_can_wakeup(struct pnp_dev *dev)
{
struct acpi_device *acpi_dev;
acpi_handle handle;
struct acpi_device *acpi_dev = ACPI_COMPANION(&dev->dev);
handle = ACPI_HANDLE(&dev->dev);
if (!handle || acpi_bus_get_device(handle, &acpi_dev)) {
if (!acpi_dev) {
dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__);
return false;
}
return acpi_bus_can_wakeup(handle);
return acpi_bus_can_wakeup(acpi_dev->handle);
}
static int pnpacpi_suspend(struct pnp_dev *dev, pm_message_t state)
{
struct acpi_device *acpi_dev;
acpi_handle handle;
struct acpi_device *acpi_dev = ACPI_COMPANION(&dev->dev);
int error = 0;
handle = ACPI_HANDLE(&dev->dev);
if (!handle || acpi_bus_get_device(handle, &acpi_dev)) {
if (!acpi_dev) {
dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__);
return 0;
}
@ -159,7 +155,7 @@ static int pnpacpi_suspend(struct pnp_dev *dev, pm_message_t state)
return error;
}
if (acpi_bus_power_manageable(handle)) {
if (acpi_device_power_manageable(acpi_dev)) {
int power_state = acpi_pm_device_sleep_state(&dev->dev, NULL,
ACPI_STATE_D3_COLD);
if (power_state < 0)
@ -167,12 +163,12 @@ static int pnpacpi_suspend(struct pnp_dev *dev, pm_message_t state)
ACPI_STATE_D0 : ACPI_STATE_D3_COLD;
/*
* acpi_bus_set_power() often fails (keyboard port can't be
* acpi_device_set_power() can fail (keyboard port can't be
* powered-down?), and in any case, our return value is ignored
* by pnp_bus_suspend(). Hence we don't revert the wakeup
* setting if the set_power fails.
*/
error = acpi_bus_set_power(handle, power_state);
error = acpi_device_set_power(acpi_dev, power_state);
}
return error;
@ -180,11 +176,10 @@ static int pnpacpi_suspend(struct pnp_dev *dev, pm_message_t state)
static int pnpacpi_resume(struct pnp_dev *dev)
{
struct acpi_device *acpi_dev;
acpi_handle handle = ACPI_HANDLE(&dev->dev);
struct acpi_device *acpi_dev = ACPI_COMPANION(&dev->dev);
int error = 0;
if (!handle || acpi_bus_get_device(handle, &acpi_dev)) {
if (!acpi_dev) {
dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__);
return -ENODEV;
}
@ -192,8 +187,8 @@ static int pnpacpi_resume(struct pnp_dev *dev)
if (device_may_wakeup(&dev->dev))
acpi_pm_device_sleep_wake(&dev->dev, false);
if (acpi_bus_power_manageable(handle))
error = acpi_bus_set_power(handle, ACPI_STATE_D0);
if (acpi_device_power_manageable(acpi_dev))
error = acpi_device_set_power(acpi_dev, ACPI_STATE_D0);
return error;
}