On Thu, Jul 18, 2013 at 01:57:33PM -0500, Joel Fernandes wrote: > On 07/18/2013 12:08 PM, Russell King - ARM Linux wrote: > > As for the maximum number of scatterlist entries, really that's a bug in > > the DMA engine implementations if they can't accept arbitary lengths. > > I've created DMA engine drivers for implementations where you have to > > program each segment individually, ones which can have the current and > > next segments, as well as those which can walk a list. Provided you get > > informed of a transfer being completed, there really is no reason for a > > DMA engine driver to limit the number of scatterlist entries that it > > will accept. > > Sure, that makes sense. Can you point to such a typical example > implementation to get some ideas? MXS MMC driver uses this: drivers/mmc/host/mxs-mmc.c And dma engine driver for this is mxs-dma.c ~Vinod -- -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
