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powerpc: Use sg->dma_length in sg_dma_len() macro on 32-bit

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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>
This commit is contained in:
Becky Bruce 2009-05-14 12:42:27 +00:00 committed by Benjamin Herrenschmidt
parent 45db924089
commit 2138422bba
1 changed files with 1 additions and 5 deletions
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6
arch/powerpc/include/asm/scatterlist.h
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@ -21,7 +21,7 @@ struct scatterlist {
unsigned int offset;
unsigned int length;
/* For TCE support */
/* For TCE or SWIOTLB support */
dma_addr_t dma_address;
u32 dma_length;
};
@ -34,11 +34,7 @@ struct scatterlist {
* is 0.
*/
#define sg_dma_address(sg) ((sg)->dma_address)
#ifdef __powerpc64__
#define sg_dma_len(sg) ((sg)->dma_length)
#else
#define sg_dma_len(sg) ((sg)->length)
#endif
#ifdef __powerpc64__
#define ISA_DMA_THRESHOLD (~0UL)