Dominique Martinet 868c9ddc18 swiotlb: add overflow checks to swiotlb_bounce ... This is a follow-up on 5f89468e2f ("swiotlb: manipulate orig_addr when tlb_addr has offset") which fixed unaligned dma mappings, making sure the following overflows are caught: - offset of the start of the slot within the device bigger than requested address' offset, in other words if the base address given in swiotlb_tbl_map_single to create the mapping (orig_addr) was after the requested address for the sync (tlb_offset) in the same block: |------------------------------------------| block <----------------------------> mapped part of the block ^ orig_addr ^ invalid tlb_addr for sync - if the resulting offset was bigger than the allocation size this one could happen if the mapping was not until the end. e.g. |------------------------------------------| block <---------------------> mapped part of the block ^ ^ orig_addr invalid tlb_addr Both should never happen so print a warning and bail out without trying to adjust the sizes/offsets: the first one could try to sync from orig_addr to whatever is left of the requested size, but the later really has nothing to sync there... Signed-off-by: Dominique Martinet <dominique.martinet@atmark-techno.com> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Reviewed-by: Bumyong Lee <bumyong.lee@samsung.com Cc: Chanho Park <chanho61.park@samsung.com> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Konrad Rzeszutek Wilk <konrad@kernel.org>		2021-07-13 20:04:56 -04:00
..
coherent.c	dma-mapping: remove a trailing space	2021-06-22 08:15:46 +02:00
contiguous.c	dma-contiguous: fix a typo error in a comment	2020-11-27 10:33:42 +01:00
debug.c	dma-debug: report -EEXIST errors in add_dma_entry	2021-06-22 08:15:47 +02:00
debug.h	dma-mapping: move dma-debug.h to kernel/dma/	2020-10-06 07:07:05 +02:00
direct.c	swiotlb: Add restricted DMA alloc/free support	2021-07-13 20:04:48 -04:00
direct.h	swiotlb: Use is_swiotlb_force_bounce for swiotlb data bouncing	2021-07-13 20:04:43 -04:00
dummy.c	dma-mapping: split <linux/dma-mapping.h>	2020-10-06 07:07:03 +02:00
Kconfig	swiotlb: Add restricted DMA pool initialization	2021-07-13 20:04:50 -04:00
Makefile	dma-mapping updates for 5.11:	2020-12-22 13:19:43 -08:00
map_benchmark.c	dma-mapping: benchmark: Add support for multi-pages map/unmap	2021-04-02 16:41:08 +02:00
mapping.c	dma-mapping: add a dma_alloc_noncontiguous API	2021-03-15 10:02:31 +01:00
ops_helpers.c	dma-mapping: merge <linux/dma-noncoherent.h> into <linux/dma-map-ops.h>	2020-10-06 07:07:06 +02:00
pool.c	dma-pool: no need to check return value of debugfs_create functions	2020-11-27 10:33:42 +01:00
remap.c	kernel/dma: remove unnecessary unmap_kernel_range	2021-04-30 11:20:40 -07:00
swiotlb.c	swiotlb: add overflow checks to swiotlb_bounce	2021-07-13 20:04:56 -04:00