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

[Douglas Gilbert]

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
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