pnpacpi: convert acpi_get_handle() to acpi_has_method()

acpi_has_method() is a new ACPI API introduced to check
the existence of an ACPI control method.

It can be used to replace acpi_get_handle() in the case that
1. the calling function doesn't need the ACPI handle of the control method.
and
2. the calling function doesn't care the reason why the method is unavailable.

Convert acpi_get_handle() to acpi_has_method()
in drivers/pnp/pnpacpi/core.c in this patch.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
CC: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/pnp/pnpacpi/core.c b/drivers/pnp/pnpacpi/core.c
index 34049b0b4c731e352ae48f62c7fd3edcfc71b517..747826d99059955f8941d592ef2f7734cd38fd08 100644 (file)
--- a/drivers/pnp/pnpacpi/core.c
+++ b/drivers/pnp/pnpacpi/core.c
@@ -239,8 +239,6 @@ static char *__init pnpacpi_get_id(struct acpi_device *device)
 
 static int __init pnpacpi_add_device(struct acpi_device *device)
 {
-       acpi_handle temp = NULL;
-       acpi_status status;
        struct pnp_dev *dev;
        char *pnpid;
        struct acpi_hardware_id *id;
@@ -253,8 +251,7 @@ static int __init pnpacpi_add_device(struct acpi_device *device)
         * If a PnPacpi device is not present , the device
         * driver should not be loaded.
         */
-       status = acpi_get_handle(device->handle, "_CRS", &temp);
-       if (ACPI_FAILURE(status))
+       if (!acpi_has_method(device->handle, "_CRS"))
                return 0;
 
        pnpid = pnpacpi_get_id(device);
@@ -271,16 +268,14 @@ static int __init pnpacpi_add_device(struct acpi_device *device)
        dev->data = device;
        /* .enabled means the device can decode the resources */
        dev->active = device->status.enabled;
-       status = acpi_get_handle(device->handle, "_SRS", &temp);
-       if (ACPI_SUCCESS(status))
+       if (acpi_has_method(device->handle, "_SRS"))
                dev->capabilities |= PNP_CONFIGURABLE;
        dev->capabilities |= PNP_READ;
        if (device->flags.dynamic_status && (dev->capabilities & PNP_CONFIGURABLE))
                dev->capabilities |= PNP_WRITE;
        if (device->flags.removable)
                dev->capabilities |= PNP_REMOVABLE;
-       status = acpi_get_handle(device->handle, "_DIS", &temp);
-       if (ACPI_SUCCESS(status))
+       if (acpi_has_method(device->handle, "_DIS"))
                dev->capabilities |= PNP_DISABLE;
 
        if (strlen(acpi_device_name(device)))