Mike Christie wrote:
For drivers like sg and st, do mean the the sg list that is passed to functions like scsi_execute_async? If we kill that argument, and instead have sg.c and other scsi_execute_async callers just call blk helpers like blk_rq_map_user then we would not have to worry about drivers like sg needing to know about chaining right? I mean sg.c would not every interact with a scatterlist. It would just interact with a request and the blk helpers map data for it.
There should be a return there. The scatterlist that sg and st interact
with is bogus. It gets thrown away in scsi_execute_async and is only used for book keeping.
I mean currently the scatterlist that sg and st use is bogus and gets thrown away. If we convert sg and st to use blk_rq_map_user then those drivers will not have to interact with a scatterlist at all.
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