[PATCH V6 2/2] dmaengine: add helper function to request a slave DMA channel

[vinod.koul@linux.intel.com (Vinod Koul)]

On Fri, 2012-09-14 at 17:41 -0500, Jon Hunter wrote:
> +/**
> + * dma_request_slave_channel - try to allocate an exclusive slave
> channel
> + * @dev:       pointer to client device structure
> + * @name:      slave channel name
> + */
> +struct dma_chan *dma_request_slave_channel(struct device *dev, char *name)
> +{
> +       /* If device-tree is present get slave info from here */
> +       if (dev->of_node)
> +               return of_dma_request_slave_channel(dev->of_node, name);
> +
Shouldn't this be conditionally compiled only when OF is built. I think
this might be problematic for systems which doesn't have device tree.
Or perhaps you can declare these symbols as dummy in of_dma.h when
device tree is not selected.
> +       return NULL;
> +}
> +EXPORT_SYMBOL_GPL(dma_request_slave_channel); 
-- 
~Vinod