Re: [RFC 1/6] bidi support: request dma_data_direction

Douglas Gilbert
2007-01-22T00:25:12Z

Boaz Harrosh wrote:
> - Introduce a new enum dma_data_direction data_dir member in struct request.
> and remove the RW bit from request->cmd_flag
> - Add new API to query request direction.
> - Adjust existing API and implementation.
> - Cleanup wrong use of DMA_BIDIRECTIONAL
> - Introduce new blk_rq_init_unqueued_req() and use it in places ad-hoc
> requests were used and bzero'ed.

With a bi-directional transfer is it always unambiguous
which transfer occurs first (or could they occur at
the same time)?

Doug Gilbert