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(parent: 433a762) | patch
dma-mapping: add a dma_need_unmap helper
authorChristoph Hellwig <hch@lst.de>
Mon, 5 May 2025 07:01:45 +0000 (10:01 +0300)
committerMarek Szyprowski <m.szyprowski@samsung.com>
Tue, 6 May 2025 06:36:53 +0000 (08:36 +0200)
commit5f3b133a23c545272b6bc1e818a5a35e1ca84b1e
treea3b8005fab8f8ce46facaabaf7c10dc41dfeedf4tree | snapshot
parent433a76207dcf5facc0183acb790f6e8398585258commit | diff
dma-mapping: add a dma_need_unmap helper

Add helper that allows a driver to skip calling dma_unmap_*
if the DMA layer can guarantee that they are no-nops.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Jens Axboe <axboe@kernel.dk>
Reviewed-by: Luis Chamberlain <mcgrof@kernel.org>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
include/linux/dma-mapping.h diff | blob | blame | history
kernel/dma/mapping.c diff | blob | blame | history
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