From 187b5b5d520c2318a1f88fb8d8913a9d7fbf7d92 Mon Sep 17 00:00:00 2001
From: Zhang Rui <rui.zhang@intel.com>
Date: Tue, 3 Sep 2013 08:32:00 +0800
Subject: [PATCH] nouveau_acpi: 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/gpu/drm/nouveau/nouveau_acpi.c in this patch.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
CC: Ben Skeggs <bskeggs@redhat.com>
CC: Dave Airlie <airlied@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
drivers/gpu/drm/nouveau/nouveau_acpi.c | 7 ++-----
1 file changed, 2 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/nouveau/nouveau_acpi.c b/drivers/gpu/drm/nouveau/nouveau_acpi.c
index dd7d2e1827194..cfbeee607b3ac 100644
--- a/drivers/gpu/drm/nouveau/nouveau_acpi.c
+++ b/drivers/gpu/drm/nouveau/nouveau_acpi.c
@@ -253,18 +253,15 @@ static struct vga_switcheroo_handler nouveau_dsm_handler = {
static int nouveau_dsm_pci_probe(struct pci_dev *pdev)
{
- acpi_handle dhandle, nvidia_handle;
- acpi_status status;
+ acpi_handle dhandle;
int retval = 0;
dhandle = DEVICE_ACPI_HANDLE(&pdev->dev);
if (!dhandle)
return false;
- status = acpi_get_handle(dhandle, "_DSM", &nvidia_handle);
- if (ACPI_FAILURE(status)) {
+ if (!acpi_has_method(dhandle, "_DSM"))
return false;
- }
if (nouveau_test_dsm(dhandle, nouveau_dsm, NOUVEAU_DSM_POWER))
retval |= NOUVEAU_DSM_HAS_MUX;