Hi, My DMA Engine has a limited resource: It's got a descriptor ring, so it's not always possible to add a new descriptor to it (i.e. it might be full). While allocating a huge ring will help, eventually I'm sure I will hit a case where it'll overflow.
I thought this was going to be taken care of automatically by the fact that you return your max(?) number of descriptors in the channel allocation function, but it looks like that value is discarded in dma_client_chan_alloc(). So, I just got a couple of spurious: dma_cookie < 0 dma_cookie < 0 ...on the console and the connection terminated. Looks like that came from tcp_recvmsg(). Ouch. How about falling back to the cpu-based copy in case of failure? Or would you prefer that I sleep locally in my driver and wait on a descriptor slot to open up? -Olof -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
