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The dma_map_bvec helper doesn't work for p2p data, so use the same blk_map_iter method that sgl uses for this memory type. Reported-by: Leon Romanovsky <leon@kernel.org> Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Keith Busch <kbusch@kernel.org>