Since m68k doesn't select ARCH_HAS_SG_CHAIN, it is not necessary to use for_each_sg() in order to loop over each sg element. But this can help find problems with drivers that do not properly initialize their sg tables when CONFIG_DEBUG_SG is enabled. Signed-off-by: Akinobu Mita <akinobu.mita@xxxxxxxxx> Cc: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> Cc: linux-m68k@xxxxxxxxxxxxxxxxxxxx Cc: linux-arch@xxxxxxxxxxxxxxx --- arch/m68k/kernel/dma.c | 19 ++++++++++++------- 1 file changed, 12 insertions(+), 7 deletions(-) diff --git a/arch/m68k/kernel/dma.c b/arch/m68k/kernel/dma.c index e546a55..564665f 100644 --- a/arch/m68k/kernel/dma.c +++ b/arch/m68k/kernel/dma.c @@ -120,13 +120,16 @@ void dma_sync_single_for_device(struct device *dev, dma_addr_t handle, } EXPORT_SYMBOL(dma_sync_single_for_device); -void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nents, - enum dma_data_direction dir) +void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sglist, + int nents, enum dma_data_direction dir) { int i; + struct scatterlist *sg; - for (i = 0; i < nents; sg++, i++) - dma_sync_single_for_device(dev, sg->dma_address, sg->length, dir); + for_each_sg(sglist, sg, nents, i) { + dma_sync_single_for_device(dev, sg->dma_address, sg->length, + dir); + } } EXPORT_SYMBOL(dma_sync_sg_for_device); @@ -151,14 +154,16 @@ dma_addr_t dma_map_page(struct device *dev, struct page *page, } EXPORT_SYMBOL(dma_map_page); -int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, +int dma_map_sg(struct device *dev, struct scatterlist *sglist, int nents, enum dma_data_direction dir) { int i; + struct scatterlist *sg; - for (i = 0; i < nents; sg++, i++) { + for_each_sg(sglist, sg, nents, i) { sg->dma_address = sg_phys(sg); - dma_sync_single_for_device(dev, sg->dma_address, sg->length, dir); + dma_sync_single_for_device(dev, sg->dma_address, sg->length, + dir); } return nents; } -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html