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authorJarkko Nikula <jarkko.nikula@linux.intel.com>2015-09-04 16:12:30 +0300
committerVinod Koul <vinod.koul@intel.com>2015-09-30 09:51:27 +0300
commitaff1e0cee36ab679552846a18d15dcb6d2e3fc4c (patch)
tree701c6f1980561c8cb7e701f43f64ecc07bb879db /drivers/dma/acpi-dma.c
parentddfe4d0cce7828d79f3e3762c664342658c3f254 (diff)
downloadlinux-aff1e0cee36ab679552846a18d15dcb6d2e3fc4c.tar.xz
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>
Diffstat (limited to 'drivers/dma/acpi-dma.c')
-rw-r--r--drivers/dma/acpi-dma.c11
1 files changed, 5 insertions, 6 deletions
diff --git a/drivers/dma/acpi-dma.c b/drivers/dma/acpi-dma.c
index 5a635646e05c..04257432c482 100644
--- a/drivers/dma/acpi-dma.c
+++ b/drivers/dma/acpi-dma.c
@@ -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));