dma-direct: retry allocations using GFP_DMA for small masks

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If an attempt to allocate memory succeeded, but isn't inside the
supported DMA mask, retry the allocation with GFP_DMA set as a
last resort.

Based on the x86 code, but an off by one error in what is now
dma_coherent_ok has been fixed vs the x86 code.

Signed-off-by: Christoph Hellwig <hch@lst.de>

...

This commit is contained in:

Christoph Hellwig 2018-01-09 23:40:57 +01:00

parent c61e963734

commit 95f183916d

1 changed files with 24 additions and 1 deletions

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lib/dma-direct.c

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