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linux/kernel/dma
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Baochen Qiang 8324993f60 dma-mapping: fix missing clear bdr in check_ram_in_range_map() 
As discussed in [1], if 'bdr' is set once, it would never get
cleared, hence 0 is always returned.

Refactor the range check hunk into a new helper dma_find_range(),
which allows 'bdr' to be cleared in each iteration.

Link: https://lore.kernel.org/all/64931fac-085b-4ff3-9314-84bac2fa9bdb@quicinc.com/ # [1]
Fixes: a409d96009 ("dma-mapping: fix dma_addressing_limited() if dma_range_map can't cover all system RAM")
Suggested-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Baochen Qiang <quic_bqiang@quicinc.com>
Link: https://lore.kernel.org/r/20250307030350.69144-1-quic_bqiang@quicinc.com
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
2025-03-12 13:41:44 +01:00
..
coherent.c dma-mapping: save base/size instead of pointer to shared DMA pool 2024-11-14 10:45:09 +01:00
contiguous.c mm/cma: drop CONFIG_CMA_DEBUG 2024-02-22 10:24:53 -08:00
debug.c dma-debug: fix physical address calculation for struct dma_debug_entry 2024-11-28 10:19:16 +01:00
debug.h dma-debug: teach add_dma_entry() about DMA_ATTR_SKIP_CPU_SYNC 2021-10-18 12:46:45 +02:00
direct.c dma-mapping: fix missing clear bdr in check_ram_in_range_map() 2025-03-12 13:41:44 +01:00
direct.h swiotlb: reduce swiotlb pool lookups 2024-07-10 07:59:03 +02:00
dummy.c dma-mapping: call ->unmap_page and ->unmap_sg unconditionally 2024-08-22 06:18:11 +02:00
Kconfig dma-debug: remove DMA_API_DEBUG_SG 2024-10-29 08:53:37 +01:00
Makefile dma-mapping: clearly mark DMA ops as an architecture feature 2024-09-04 07:08:51 +03:00
map_benchmark.c dma-mapping: benchmark: Don't starve others when doing the test 2024-07-09 07:48:32 +02:00
mapping.c dma-mapping: fix swapped dir/flags arguments to trace_dma_alloc_sgt_err 2024-11-08 14:56:39 +01:00
ops_helpers.c dma-mapping: use IOMMU DMA calls for common alloc/free page calls 2024-09-05 14:29:42 +03:00
pool.c dma-mapping: replace zone_dma_bits by zone_dma_limit 2024-08-22 06:18:00 +02:00
remap.c dma-mapping: use bit masking to check VM_DMA_COHERENT 2024-08-22 06:15:35 +02:00
swiotlb.c dma-mapping: replace zone_dma_bits by zone_dma_limit 2024-08-22 06:18:00 +02:00