From: Akinobu Mita Date: Wed, 24 Jun 2015 23:54:40 +0000 (-0700) Subject: metag: use for_each_sg() X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=ae70a7bbc5eb7d32d9822db4a50fd17b307743de;p=openwrt%2Fstaging%2Fblogic.git metag: use for_each_sg() This replaces the plain loop over the sglist array with for_each_sg() macro which consists of sg_next() function calls. Since metag 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 Cc: James Hogan Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/arch/metag/include/asm/dma-mapping.h b/arch/metag/include/asm/dma-mapping.h index 14b23efd9b7a..eb5cdec94be0 100644 --- a/arch/metag/include/asm/dma-mapping.h +++ b/arch/metag/include/asm/dma-mapping.h @@ -134,20 +134,24 @@ dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_handle, } static inline void -dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems, +dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sglist, int nelems, enum dma_data_direction direction) { int i; - for (i = 0; i < nelems; i++, sg++) + struct scatterlist *sg; + + for_each_sg(sglist, sg, nelems, i) dma_sync_for_cpu(sg_virt(sg), sg->length, direction); } static inline void -dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems, - enum dma_data_direction direction) +dma_sync_sg_for_device(struct device *dev, struct scatterlist *sglist, + int nelems, enum dma_data_direction direction) { int i; - for (i = 0; i < nelems; i++, sg++) + struct scatterlist *sg; + + for_each_sg(sglist, sg, nelems, i) dma_sync_for_device(sg_virt(sg), sg->length, direction); }