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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>
This commit is contained in:
Jarkko Nikula 2015-09-04 16:12:30 +03:00 committed by Vinod Koul
parent ddfe4d0cce
commit aff1e0cee3
1 changed files with 5 additions and 6 deletions
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11
drivers/dma/acpi-dma.c
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@ -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));