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powerpc: Use sg->dma_length in sg_dma_len() macro on 32-bit
Currently, the 32-bit code uses sg->length instead of sg->dma_lentgh to report sg_dma_len. However, since the default dma code for 32-bit (the dma_direct case) sets dma_length and length to the same thing, we should be able to use dma_length there as well. This gets rid of some 32-vs-64-bit ifdefs, and is needed by the swiotlb code which actually distinguishes between dma_length and length. Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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@ -21,7 +21,7 @@ struct scatterlist {
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unsigned int offset;
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unsigned int length;
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/* For TCE support */
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/* For TCE or SWIOTLB support */
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dma_addr_t dma_address;
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u32 dma_length;
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};
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@ -34,11 +34,7 @@ struct scatterlist {
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* is 0.
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*/
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#define sg_dma_address(sg) ((sg)->dma_address)
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#ifdef __powerpc64__
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#define sg_dma_len(sg) ((sg)->dma_length)
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#else
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#define sg_dma_len(sg) ((sg)->length)
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#endif
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#ifdef __powerpc64__
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#define ISA_DMA_THRESHOLD (~0UL)
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