On Mon, Dec 07, 2015 at 03:43:06PM -0500, Dennis Dalessandro wrote:
> +
> +#define BAD_DMA_ADDRESS ((u64)0)
What is the advantage in using directly u64 values instead of
pointers? You will get NULL and functions which return pointers
without need of casting.
...
> +static u64 rvt_dma_map_single(struct ib_device *dev, void *cpu_addr,
> + size_t size, enum dma_data_direction direction)
> +{
> + if (WARN_ON(!valid_dma_direction(direction)))
> + return BAD_DMA_ADDRESS;
> +
> + return (u64)cpu_addr;
> +}
An example of such function.
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