On 08/06/2015 02:31 PM, Sebastian Andrzej Siewior wrote: Hi Peter, >> I'll look at/test this this weekend, ok? > > Sure. I'm currently re-spinning the patches so have everything in > proper pieces. While at it I will take a look at x_char. So now that I actually look at it. If I read this right, we never send the x_char if the TX-DMA never fails to do its job. The comment above uart_send_xchar() says it is high priority. What do you suggest, wait until the transfer completes, send the x_char _or_ pause the transfer send that byte and then send the byte? In both cases we have to wait until for the FIFO-empty interrupt to make sure we don't overrun that TX-FIFO. I *think* waiting until the transfer completes would be simpler but it is not necessarily high priority. >> Regards, >> Peter Hurley Sebastian -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
