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| author |   Akinobu Mita <akinobu.mita@gmail.com> | 2015-06-30 14:58:30 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2015-06-30 19:44:58 -0700 |
| commit | 92ed932d3081e494a6c61d22c093af100a313034 (patch) | |
| tree | 6beecb5f7b26bfebb0769273e5a92c64651dcd2f /arch/arc | |
| parent | devpts: if initialization failed, don't crash when opening /dev/ptmx (diff) | |
| download | linux-dev-92ed932d3081e494a6c61d22c093af100a313034.tar.xz linux-dev-92ed932d3081e494a6c61d22c093af100a313034.zip | |
arc: 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 arc 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>
Acked-by: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/arc')
| -rw-r--r-- | arch/arc/include/asm/dma-mapping.h | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/arch/arc/include/asm/dma-mapping.h b/arch/arc/include/asm/dma-mapping.h index 45b8e0cea176..f787894613ad 100644 --- a/arch/arc/include/asm/dma-mapping.h +++ b/arch/arc/include/asm/dma-mapping.h @@ -178,22 +178,24 @@ 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 dir) { int i; + struct scatterlist *sg; - for (i = 0; i < nelems; i++, sg++) + for_each_sg(sglist, sg, nelems, i) _dma_cache_sync((unsigned int)sg_virt(sg), sg->length, dir); } static inline void -dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems, - enum dma_data_direction dir) +dma_sync_sg_for_device(struct device *dev, struct scatterlist *sglist, + int nelems, enum dma_data_direction dir) { int i; + struct scatterlist *sg; - for (i = 0; i < nelems; i++, sg++) + for_each_sg(sglist, sg, nelems, i) _dma_cache_sync((unsigned int)sg_virt(sg), sg->length, dir); } |