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dma-mapping: remove leftover NULL device support

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Most dma_map_ops implementations already had some issues with a NULL
device, or did simply crash if one was fed to them.  Now that we have
cleaned up all the obvious offenders we can stop to pretend we
support this mode.

Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Christoph Hellwig
2019-03-13 18:45:21 +01:00
parent 5ab6a91a1c
commit d7e02a9312
3 changed files with 10 additions and 11 deletions
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6
include/linux/dma-mapping.h
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@@ -267,9 +267,9 @@ size_t dma_direct_max_mapping_size(struct device *dev);
static inline const struct dma_map_ops *get_dma_ops(struct device *dev)
{
if (dev && dev->dma_ops)
if (dev->dma_ops)
return dev->dma_ops;
return get_arch_dma_ops(dev ? dev->bus : NULL);
return get_arch_dma_ops(dev->bus);
}
static inline void set_dma_ops(struct device *dev,
@@ -650,7 +650,7 @@ static inline void dma_free_coherent(struct device *dev, size_t size,
static inline u64 dma_get_mask(struct device *dev)
{
if (dev && dev->dma_mask && *dev->dma_mask)
if (dev->dma_mask && *dev->dma_mask)
return *dev->dma_mask;
return DMA_BIT_MASK(32);
}