mirror of
https://github.com/torvalds/linux.git
synced 2026-03-08 03:04:51 +01:00
61868dc55a
When multiple small DMA_FROM_DEVICE or DMA_BIDIRECTIONAL buffers share a cacheline, and DMA_API_DEBUG is enabled, we get this warning: cacheline tracking EEXIST, overlapping mappings aren't supported. This is because when one of the mappings is removed, while another one is active, CPU might write into the buffer. Add an attribute for the driver to promise not to do this, making the overlapping safe, and suppressing the warning. Message-ID: <2d5d091f9d84b68ea96abd545b365dd1d00bbf48.1767601130.git.mst@redhat.com> Reviewed-by: Petr Tesarik <ptesarik@suse.com> Acked-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> |
||
|---|---|---|
| .. | ||
| coherent.c | ||
| contiguous.c | ||
| debug.c | ||
| debug.h | ||
| direct.c | ||
| direct.h | ||
| dummy.c | ||
| Kconfig | ||
| Makefile | ||
| map_benchmark.c | ||
| mapping.c | ||
| ops_helpers.c | ||
| pool.c | ||
| remap.c | ||
| swiotlb.c | ||