dmaengine: acpi: Use ACPI_COMPANION() instead of acpi_bus_get_device()
Get pointer to the struct acpi_device by using ACPI_COMPANION() macro. This
is more efficient than using ACPI_HANDLE() and acpi_bus_get_device().
Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
diff --git a/drivers/dma/acpi-dma.c b/drivers/dma/acpi-dma.c
index 5a63564..0425743 100644
--- a/drivers/dma/acpi-dma.c
+++ b/drivers/dma/acpi-dma.c
@@ -160,10 +160,8 @@
return -EINVAL;
/* Check if the device was enumerated by ACPI */
- if (!ACPI_HANDLE(dev))
- return -EINVAL;
-
- if (acpi_bus_get_device(ACPI_HANDLE(dev), &adev))
+ adev = ACPI_COMPANION(dev);
+ if (!adev)
return -EINVAL;
adma = kzalloc(sizeof(*adma), GFP_KERNEL);
@@ -358,10 +356,11 @@
int found;
/* Check if the device was enumerated by ACPI */
- if (!dev || !ACPI_HANDLE(dev))
+ if (!dev)
return ERR_PTR(-ENODEV);
- if (acpi_bus_get_device(ACPI_HANDLE(dev), &adev))
+ adev = ACPI_COMPANION(dev);
+ if (!adev)
return ERR_PTR(-ENODEV);
memset(&pdata, 0, sizeof(pdata));