dma-debug: don't enforce dma mapping check on noncoherent allocations

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[ Upstream commit 7e2368a217 ]

As discussed in [1], there is no need to enforce dma mapping check on
noncoherent allocations, a simple test on the returned CPU address is
good enough.

Add a new pair of debug helpers and use them for noncoherent alloc/free
to fix this issue.

Fixes: efa70f2fdc ("dma-mapping: add a new dma_alloc_pages API")
Link: https://lore.kernel.org/all/ff6c1fe6-820f-4e58-8395-df06aa91706c@oss.qualcomm.com # 1
Signed-off-by: Baochen Qiang <baochen.qiang@oss.qualcomm.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Link: https://lore.kernel.org/r/20250828-dma-debug-fix-noncoherent-dma-check-v1-1-76e9be0dd7fc@oss.qualcomm.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

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This commit is contained in:

Baochen Qiang 2025-08-28 16:17:33 +08:00 • committed by Greg Kroah-Hartman

parent 245eb0b6bd

commit c6eb8d2d63

3 changed files with 69 additions and 3 deletions

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48

kernel/dma/debug.c

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20

kernel/dma/debug.h

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4

kernel/dma/mapping.c

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