m68k: 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 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@gmail.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: linux-m68k@lists.linux-m68k.org Cc: linux-arch@vger.kernel.org Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
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@ -120,13 +120,16 @@ void dma_sync_single_for_device(struct device *dev, dma_addr_t handle,
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}
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}
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EXPORT_SYMBOL(dma_sync_single_for_device);
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EXPORT_SYMBOL(dma_sync_single_for_device);
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void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nents,
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void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sglist,
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enum dma_data_direction dir)
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int nents, enum dma_data_direction dir)
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{
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{
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int i;
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int i;
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struct scatterlist *sg;
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for (i = 0; i < nents; sg++, i++)
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for_each_sg(sglist, sg, nents, i) {
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dma_sync_single_for_device(dev, sg->dma_address, sg->length, dir);
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dma_sync_single_for_device(dev, sg->dma_address, sg->length,
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dir);
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}
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}
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}
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EXPORT_SYMBOL(dma_sync_sg_for_device);
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EXPORT_SYMBOL(dma_sync_sg_for_device);
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@ -151,14 +154,16 @@ dma_addr_t dma_map_page(struct device *dev, struct page *page,
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}
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}
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EXPORT_SYMBOL(dma_map_page);
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EXPORT_SYMBOL(dma_map_page);
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int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
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int dma_map_sg(struct device *dev, struct scatterlist *sglist, int nents,
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enum dma_data_direction dir)
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enum dma_data_direction dir)
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{
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{
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int i;
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int i;
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struct scatterlist *sg;
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for (i = 0; i < nents; sg++, i++) {
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for_each_sg(sglist, sg, nents, i) {
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sg->dma_address = sg_phys(sg);
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sg->dma_address = sg_phys(sg);
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dma_sync_single_for_device(dev, sg->dma_address, sg->length, dir);
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dma_sync_single_for_device(dev, sg->dma_address, sg->length,
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dir);
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}
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}
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return nents;
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return nents;
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}
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}
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