Fedor Pchelkin 63371be47f dma-debug: fix physical address calculation for struct dma_debug_entry ... [ Upstream commit aef7ee7649 ] Offset into the page should also be considered while calculating a physical address for struct dma_debug_entry. page_to_phys() just shifts the value PAGE_SHIFT bits to the left so offset part is zero-filled. An example (wrong) debug assertion failure with CONFIG_DMA_API_DEBUG enabled which is observed during systemd boot process after recent dma-debug changes: DMA-API: e1000 0000:00:03.0: cacheline tracking EEXIST, overlapping mappings aren't supported WARNING: CPU: 4 PID: 941 at kernel/dma/debug.c:596 add_dma_entry CPU: 4 UID: 0 PID: 941 Comm: ip Not tainted 6.12.0+ #288 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:add_dma_entry kernel/dma/debug.c:596 Call Trace: <TASK> debug_dma_map_page kernel/dma/debug.c:1236 dma_map_page_attrs kernel/dma/mapping.c:179 e1000_alloc_rx_buffers drivers/net/ethernet/intel/e1000/e1000_main.c:4616 ... Found by Linux Verification Center (linuxtesting.org). Fixes: 9d4f645a1f ("dma-debug: store a phys_addr_t in struct dma_debug_entry") Signed-off-by: Fedor Pchelkin <pchelkin@ispras.ru> [hch: added a little helper to clean up the code] Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Sasha Levin <sashal@kernel.org>		2025-09-19 16:35:42 +02:00
..
coherent.c
contiguous.c	of: reserved_mem: Restructure call site for dma_contiguous_early_fixup()	2025-09-04 15:31:45 +02:00
debug.c	dma-debug: fix physical address calculation for struct dma_debug_entry	2025-09-19 16:35:42 +02:00
debug.h	dma-debug: don't enforce dma mapping check on noncoherent allocations	2025-09-19 16:35:42 +02:00
direct.c
direct.h
dummy.c
Kconfig
Makefile
map_benchmark.c
mapping.c	dma-mapping: fix swapped dir/flags arguments to trace_dma_alloc_sgt_err	2025-09-19 16:35:42 +02:00
ops_helpers.c
pool.c	dma/pool: Ensure DMA_DIRECT_REMAP allocations are decrypted	2025-09-04 15:31:54 +02:00
remap.c
swiotlb.c