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dma-debug: fix physical address retrieval in debug_dma_sync_sg_for_device

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In debug_dma_sync_sg_for_device(), when iterating over a scatterlist,
the debug entry population mistakenly uses the head of the scatterlist
'sg' to fetch the physical address via sg_phys(), instead of using the
current iterator variable 's'.

This causes dma-debug to track the physical address of the very first
scatterlist entry for all subsequent entries in the list.

Fix this by passing the correct loop iterator 's' to sg_phys()

Fixes: 9d4f645a1f ("dma-debug: store a phys_addr_t in struct dma_debug_entry")
Signed-off-by: Li RongQing <lirongqing@baidu.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Link: https://lore.kernel.org/r/20260603123708.1665-1-lirongqing@baidu.com
This commit is contained in:
Li RongQing 2026-06-03 20:37:08 +08:00 • committed by Marek Szyprowski
commit 9bfaa86b40
1 changed files with 1 additions and 1 deletions
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2
kernel/dma/debug.c
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@ -1556,7 +1556,7 @@ void debug_dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
struct dma_debug_entry ref = {
.type = dma_debug_sg,
.dev = dev,
.paddr = sg_phys(sg),
.paddr = sg_phys(s),
.dev_addr = sg_dma_address(s),
.size = sg_dma_len(s),
.direction = direction,