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Commit aff1e0ce authored by Jarkko Nikula's avatar Jarkko Nikula Committed by Vinod Koul
Browse files

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: default avatarJarkko Nikula <jarkko.nikula@linux.intel.com>
Acked-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
parent ddfe4d0c

drivers/dma/acpi-dma.c

+5 −6
Original line number Diff line number Diff line
@@ -160,10 +160,8 @@ int acpi_dma_controller_register(struct device *dev, 
		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 @@ struct dma_chan *acpi_dma_request_slave_chan_by_index(struct device *dev, 
	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));