On Wed, May 20, 2015 at 12:05:54AM +0200, Lorenzo Nava wrote: > Maybe my interpretation of dma_alloc_coherent() is not correct, and > the coherency can be managed using the dma_sync_single_for_* functions > and it doesn't require hardware mechanism.
dma_sync_single_for_* are only for use with the streaming DMA API, where you must have already mapped the buffer using one of the dma_map_* functions. Anything other than that is abusing the API. -- FTTC broadband for 0.8mile line: currently at 10.5Mbps down 400kbps up according to speedtest.net. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
