On Mon, 7 May 2012 15:00:50 -0500 Karthik Manamcheri <karthik.manamcheri@xxxxxxxxx> wrote: > Hi, > > I noticed in drivers/tty/serial/8250.c that when we transmit > characters (by calling transmit_chars), we check for uart_tx_stopped > only after sending the x_char (if any). What's the rationale behind > this ? I would expect the uart not to send ANY characters (including a > Xoff character) if its throttled (or stopped). We implement xon/xoff flow control. Therefore we need to send characters when throttled. Think about the case where you are flow controlled for transmit and your receive buffer fills up... Alan -- 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
