dma-pool: Only allocate from CMA when in same memory zone

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There is no guarantee to CMA's placement, so allocating a zone specific
atomic pool from CMA might return memory from a completely different
memory zone. To get around this double check CMA's placement before
allocating from it.

Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>

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Nicolas Saenz Julienne 2020-08-14 12:26:23 +02:00 • committed by Christoph Hellwig

parent 9420139f51

commit d7e673ec2c

1 changed files with 30 additions and 1 deletions

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kernel/dma/pool.c

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