tjh.dev / kernel
Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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dma-mapping: avoid random addr value print out on error path

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: e53d29f957b3 ("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

authored by

Jiri Pirko and committed by
Marek Szyprowski 47322c46 6de23f81

+1 -1
+1 -1
kernel/dma/direct.h
··· 85 85 86 86 if (is_swiotlb_force_bounce(dev)) { 87 87 if (attrs & DMA_ATTR_MMIO) 88 - goto err_overflow; 88 + return DMA_MAPPING_ERROR; 89 89 90 90 return swiotlb_map(dev, phys, size, dir, attrs); 91 91 }