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i915: intel_acpi: convert acpi_get_handle() to acpi_has_method()

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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/gpu/drm/i915/intel_acpi.c in this patch.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Zhang Rui 2013-09-03 08:31:59 +08:00 committed by Rafael J. Wysocki
parent 7ca9b57491
commit 2a3ca14295
1 changed files with 2 additions and 4 deletions
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6
drivers/gpu/drm/i915/intel_acpi.c
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@ -193,16 +193,14 @@ out:
static bool intel_dsm_pci_probe(struct pci_dev *pdev)
{
acpi_handle dhandle, intel_handle;
acpi_status status;
acpi_handle dhandle;
int ret;
dhandle = DEVICE_ACPI_HANDLE(&pdev->dev);
if (!dhandle)
return false;
status = acpi_get_handle(dhandle, "_DSM", &intel_handle);
if (ACPI_FAILURE(status)) {
if (!acpi_has_method(dhandle, "_DSM")) {
DRM_DEBUG_KMS("no _DSM method for intel device\n");
return false;
}