Messages in this thread | | | Date | Fri, 8 Feb 2019 01:23:16 +0200 | From | Sakari Ailus <> | Subject | Re: [PATCH] lib/scatterlist: Provide a DMA page iterator |
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On Fri, Jan 04, 2019 at 10:35:43PM +0000, Jason Gunthorpe wrote: > Commit 2db76d7c3c6d ("lib/scatterlist: sg_page_iter: support sg lists w/o > backing pages") introduced the sg_page_iter_dma_address() function without > providing a way to use it in the general case. If the sg_dma_len is not > equal to the dma_length callers cannot safely use the > for_each_sg_page/sg_page_iter_dma_address combination. > > Resolve this API mistake by providing a DMA specific iterator, > for_each_sg_dma_page(), that uses the right length so > sg_page_iter_dma_address() works as expected with all sglists. A new > iterator type is introduced to provide compile-time safety against wrongly > mixing accessors and iterators. > > Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com> (ipu3-cio2)
-- Sakari Ailus sakari.ailus@linux.intel.com
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