On Wed, Jun 17, 2015 at 01:33:24PM +0200, Boris Brezillon wrote: > > Actually, I think I don't need to save the dma_map_sg return val, since > I'm using the sg_next function to iterate over the scatterlist. Am I > right ? > IOW, is the ->map_sg() function (in dma_map_ops) supposed to merge the > contiguous entries and then flag the unused entries with the is_chain > flag ?
Right. If you're simply using sg_dma_length in conjunction with sg_next then you don't need the new length. Cheers, -- Email: Herbert Xu <[email protected]> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
