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dma-mapping: avoid random addr value print out on error path

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dma_addr is unitialized in dma_direct_map_phys() when swiotlb is forced
and DMA_ATTR_MMIO is set which leads to random value print out in
warning. Fix that by just returning DMA_MAPPING_ERROR.

Fixes: e53d29f957 ("dma-mapping: convert dma_direct_*map_page to be phys_addr_t based")
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Link: https://lore.kernel.org/r/20260209153809.250835-2-jiri@resnulli.us
This commit is contained in:
Jiri Pirko 2026-02-09 16:38:05 +01:00 • committed by Marek Szyprowski
parent 6de23f81a5
commit 47322c469d
1 changed files with 1 additions and 1 deletions
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2
kernel/dma/direct.h
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@ -85,7 +85,7 @@ static inline dma_addr_t dma_direct_map_phys(struct device *dev,
if (is_swiotlb_force_bounce(dev)) {
if (attrs & DMA_ATTR_MMIO)
goto err_overflow;
return DMA_MAPPING_ERROR;
return swiotlb_map(dev, phys, size, dir, attrs);
}