dma-pool: make sure atomic pool suits device

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When allocating DMA memory from a pool, the core can only guess which
atomic pool will fit a device's constraints. If it doesn't, get a safer
atomic pool and try again.

Fixes: c84dc6e68a ("dma-pool: add additional coherent pools to map to gfp mask")
Reported-by: Jeremy Linton <jeremy.linton@arm.com>
Suggested-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>

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Nicolas Saenz Julienne 2020-07-14 14:39:28 +02:00 • committed by Christoph Hellwig

parent 48b6703858

commit 81e9d894e0

1 changed files with 37 additions and 20 deletions

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kernel/dma/pool.c

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