openrisc: remove the partial DMA_ATTR_NON_CONSISTENT support

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The openrisc DMA code supports DMA_ATTR_NON_CONSISTENT allocations, but
does not provide a cache_sync operation.  This means any user of it
will never be able to actually transfer cache ownership and thus cause
coherency bugs.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Stafford Horne <shorne@gmail.com>

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Christoph Hellwig 2019-06-03 12:54:13 +02:00

parent 80e61fcd23

commit 961729bfc7

1 changed files with 9 additions and 13 deletions

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22

arch/openrisc/kernel/dma.c

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