Stop trying to bounce in memory allocated by bus dma
Memory allocated by bus_dmamem_alloc will take into account any alignment requirements of the CPU it's running on. Stop trying to bounce in this case as there is no bounce zone allocated. Reported by: manu, tuexen Tested by: manu Sponsored by: Innovate UK
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Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=367365
@ -206,6 +206,10 @@ might_bounce(bus_dma_tag_t dmat, bus_dmamap_t map, bus_addr_t paddr,
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bus_size_t size)
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bus_size_t size)
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{
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{
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/* Memory allocated by bounce_bus_dmamem_alloc won't bounce */
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if ((map->flags & DMAMAP_FROM_DMAMEM) != 0)
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return (false);
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if ((dmat->bounce_flags & BF_COULD_BOUNCE) != 0)
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if ((dmat->bounce_flags & BF_COULD_BOUNCE) != 0)
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return (true);
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return (true);
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