On Thu, Jul 15, 2021 at 10:45:29AM -0600, Logan Gunthorpe wrote:
> + * dma_map_sgtable() will return the error code returned and convert
> + * a zero return (for legacy implementations) into -EINVAL.
> + *
> + * dma_map_sg() will always return zero on any negative or zero
> +
Allow dma_map_sgtable() to pass errors from the map_sg() ops. This
will be required for returning appropriate error codes when mapping
P2PDMA memory.
Introduce __dma_map_sg_attrs() which will return the raw error code
from the map_sg operation (whether it be negative or zero). Then add a
