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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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2
kernel/dma/direct.c
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@@ -311,7 +311,7 @@ static inline bool dma_direct_possible(struct device *dev, dma_addr_t dma_addr,
size_t size)
{
return swiotlb_force != SWIOTLB_FORCE &&
(!dev || dma_capable(dev, dma_addr, size));
dma_capable(dev, dma_addr, size);
}
dma_addr_t dma_direct_map_page(struct device *dev, struct page *page,