Messages in this thread | | | Date | Mon, 15 Mar 2010 17:30:19 -0400 (EDT) | From | Alan Stern <> | Subject | dma_sync_sg_for_cpu applied to a single scatterlist element |
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This is addressed to James Bottomley as he is the author of Documentation/DMA-API.txt, but anyone else who can contribute is invited to do so.
Suppose a scatter-gather transfer with multiple scatterlist elements has been mapped via dma_map_sg(). Is it then valid to call dma_sync_sg_for_cpu() with the "sg" argument pointing to one of the mapped scatterlist elements (not necessarily the first one) and the "nelems" argument set to 1?
Thanks,
Alan Stern
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