Messages in this thread Patch in this message | | | From | Geert Uytterhoeven <> | Subject | [PATCH/RFC] dma-mapping: Provide dummy set_dma_ops() for NO_DMA=y | Date | Sun, 9 Jul 2017 21:33:45 +0200 |
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Adding a dummy for set_dma_ops() allows to compile (sub)drivers that don't actually use the DMA API, but propagate DMA ops configuration to a second driver that may or may not use the DMA API. Of course the second driver does have to depend on HAS_DMA if it uses the DMA API.
An example is commit 5567e989198b5a8d ("fsl/fman: propagate dma_ops").
This allows to revert commit 85688d9adf685572 ("fsl/fman: add dependency on HAS_DMA").
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> --- include/linux/dma-mapping.h | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h index 843ab866e0f487c2..0ab244b954418e2b 100644 --- a/include/linux/dma-mapping.h +++ b/include/linux/dma-mapping.h @@ -194,6 +194,8 @@ static inline const struct dma_map_ops *get_dma_ops(struct device *dev) { return &bad_dma_ops; } +static inline void set_dma_ops(struct device *dev, + const struct dma_map_ops *dma_ops) {} #endif static inline dma_addr_t dma_map_single_attrs(struct device *dev, void *ptr, -- 2.7.4
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