Hi This is something, that seems to be missing from all mmc host drivers. At least all except sdhci and, possibly, mmc-spi, but sdhci uses its own DMA engine, and mmc-spi does DMA synchronisation in a somewhat strange way - before and after SPI synchronisation for both data transfer directions. Otherwise all other drivers map and unmap SG lists, perform DMA transfers, but never call dma_sync_*_for_*(). Apparantly, this works, but IIUC, this violates the DMA API. I'm attaching a couple of patches for a couple of those drivers for consideration. If this is confirmed to be the right thing to do, I could do more of those.
Thanks Guennadi --- Guennadi Liakhovetski, Ph.D. Freelance Open-Source Software Developer http://www.open-technology.de/ -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
