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
sg_dma_len(sg) is invalid before the s/g list is DMA-mapped. This fixes a post 2.6.24 regression which prevents access to SBP-2 devices on several architectures, introduced by "ieee1394: sbp2: s/g list access cosmetics", commit 825f1df545ab0289185373b0eaf06fb0b3487422. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>