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dma-mapping: move valid_dma_direction to dma-direction.h 

Move the valid_dma_direction helper to a more suitable header, and
clean it up to use the proper enum as well as removing pointless braces.

Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Christoph Hellwig 2020-09-11 09:31:32 +02:00
parent 7ae10eb903
commit db4268f8c5
2 changed files with 7 additions and 8 deletions
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8
include/linux/dma-direction.h
View File

@ -9,4 +9,10 @@ enum dma_data_direction {
DMA_NONE = 3,
};
#endif
static inline int valid_dma_direction(enum dma_data_direction dir)
{
return dir == DMA_BIDIRECTIONAL || dir == DMA_TO_DEVICE ||
dir == DMA_FROM_DEVICE;
}
#endif /* _LINUX_DMA_DIRECTION_H */

7
include/linux/dma-mapping.h
View File

@ -138,13 +138,6 @@ extern const struct dma_map_ops dma_dummy_ops;
#define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
static inline int valid_dma_direction(int dma_direction)
{
return ((dma_direction == DMA_BIDIRECTIONAL) ||
(dma_direction == DMA_TO_DEVICE) ||
(dma_direction == DMA_FROM_DEVICE));
}
#ifdef CONFIG_DMA_DECLARE_COHERENT
/*
* These three functions are only for dma allocator.