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| author | Christoph Hellwig <hch@lst.de> | 2019-04-29 17:16:42 +0300 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2019-06-25 08:54:06 +0300 |
| commit | 4a54d16f615f41489b2ecbc940f6eb2618ddafd6 (patch) | |
| tree | e12a8aa22cac1d57f7135ada2284801a5f1db8b9 /mm/cleancache.c | |
| parent | 591fcf3b301b3396d96f082298a9e8403c027d3f (diff) | |
| download | linux-4a54d16f615f41489b2ecbc940f6eb2618ddafd6.tar.xz | |
dma-mapping: truncate dma masks to what dma_addr_t can hold
The dma masks in struct device are always 64-bits wide. But for builds
using a 32-bit dma_addr_t we need to ensure we don't store an
unsupportable value. Before Linux 5.0 this was handled at least by
the ARM dma mapping code by never allowing to set a larger dma_mask,
but these days we allow the driver to just set the largest supported
value and never fall back to a smaller one. Ensure this always works
by truncating the value.
Fixes: 9eb9e96e97b3 ("Documentation/DMA-API-HOWTO: update dma_mask sections")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'mm/cleancache.c')
0 files changed, 0 insertions, 0 deletions