dma-direct: only limit the mapping size if swiotlb could be used

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Don't just check for a swiotlb buffer, but also if buffering might
be required for this particular device.

Fixes: 133d624b1c ("dma: Introduce dma_max_mapping_size()")
Reported-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

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Christoph Hellwig 2019-07-16 22:00:54 +02:00

parent b866455423

commit a5008b59cd

1 changed files with 4 additions and 6 deletions

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kernel/dma/direct.c

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