Commit d97fbbed authored by Paul Mundt's avatar Paul Mundt
Browse files

serial: sh-sci: Support icount statistics for error cases. 



Presently the icount stats are only adjusted for the rx/tx case, this
makes sure that they're updated appropriately for the non-tx/rx cases,
too (specifically overruns, breaks, as well as frame and parity errors).

Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
parent 0979e0e6

drivers/tty/serial/sh-sci.c

+16 −0
Original line number Diff line number Diff line
@@ -621,6 +621,7 @@ static void sci_receive_chars(struct uart_port *port) 
		} else {

			for (i = 0; i < count; i++) {

				char c = sci_in(port, SCxRDR);



				status = sci_in(port, SCxSR);

#if defined(CONFIG_CPU_SH3)

				/* Skip "chars" during break */
@@ -649,9 +650,11 @@ static void sci_receive_chars(struct uart_port *port) 
				/* Store data and status */

				if (status & SCxSR_FER(port)) {

					flag = TTY_FRAME;

					port->icount.frame++;

					dev_notice(port->dev, "frame error\n");

				} else if (status & SCxSR_PER(port)) {

					flag = TTY_PARITY;

					port->icount.parity++;

					dev_notice(port->dev, "parity error\n");

				} else

					flag = TTY_NORMAL;
@@ -723,6 +726,8 @@ static int sci_handle_errors(struct uart_port *port) 
	 */

	if (s->cfg->overrun_bit != SCIx_NOT_SUPPORTED) {

		if (status & (1 << s->cfg->overrun_bit)) {

			port->icount.overrun++;



			/* overrun error */

			if (tty_insert_flip_char(tty, 0, TTY_OVERRUN))

				copied++;
@@ -737,6 +742,8 @@ static int sci_handle_errors(struct uart_port *port) 
			struct sci_port *sci_port = to_sci_port(port);



			if (!sci_port->break_flag) {

				port->icount.brk++;



				sci_port->break_flag = 1;

				sci_schedule_break_timer(sci_port);
@@ -752,6 +759,8 @@ static int sci_handle_errors(struct uart_port *port) 


		} else {

			/* frame error */

			port->icount.frame++;



			if (tty_insert_flip_char(tty, 0, TTY_FRAME))

				copied++;
@@ -761,6 +770,8 @@ static int sci_handle_errors(struct uart_port *port) 


	if (status & SCxSR_PER(port)) {

		/* parity error */

		port->icount.parity++;



		if (tty_insert_flip_char(tty, 0, TTY_PARITY))

			copied++;
@@ -787,6 +798,8 @@ static int sci_handle_fifo_overrun(struct uart_port *port) 
	if ((sci_in(port, SCLSR) & (1 << s->cfg->overrun_bit))) {

		sci_out(port, SCLSR, 0);



		port->icount.overrun++;



		tty_insert_flip_char(tty, 0, TTY_OVERRUN);

		tty_flip_buffer_push(tty);
@@ -812,6 +825,9 @@ static int sci_handle_breaks(struct uart_port *port) 
		/* Debounce break */

		s->break_flag = 1;

#endif



		port->icount.brk++;



		/* Notify of BREAK */

		if (tty_insert_flip_char(tty, 0, TTY_BREAK))

			copied++;