On Friday, September 04, 2015 04:12:30 PM Jarkko Nikula wrote: > 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@xxxxxxxxxxxxxxx> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx> > --- > drivers/dma/acpi-dma.c | 11 +++++------ > 1 file 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)); > -- I speak only for myself. Rafael J. Wysocki, Intel Open Source Technology Center. -- To unsubscribe from this list: send the line "unsubscribe dmaengine" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
