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Commit 9b289932 authored by Manfred Schlaegl's avatar Manfred Schlaegl Committed by Greg Kroah-Hartman
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serial: imx: count tty buffer overruns 



As can be seen in function uart_insert_char (serial_core) the element
buf_overrun of struct uart_icount is used to count overruns of
tty-buffer.
Added support for counting of overruns in imx driver analogue to
serial_core.

Signed-off-by: default avatarManfred Schlaegl <manfred.schlaegl@gmx.at>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 8a61f0c7

drivers/tty/serial/imx.c

+9 −3
Original line number Diff line number Diff line
@@ -700,7 +700,8 @@ static irqreturn_t imx_rxint(int irq, void *dev_id) 
		if (sport->port.ignore_status_mask & URXD_DUMMY_READ)

			goto out;



		tty_insert_flip_char(port, rx, flg);

		if (tty_insert_flip_char(port, rx, flg) == 0)

			sport->port.icount.buf_overrun++;

	}



out:
@@ -921,8 +922,13 @@ static void dma_rx_callback(void *data) 
	dev_dbg(sport->port.dev, "We get %d bytes.\n", count);



	if (count) {

		if (!(sport->port.ignore_status_mask & URXD_DUMMY_READ))

			tty_insert_flip_string(port, sport->rx_buf, count);

		if (!(sport->port.ignore_status_mask & URXD_DUMMY_READ)) {

			int bytes = tty_insert_flip_string(port, sport->rx_buf,

					count);



			if (bytes != count)

				sport->port.icount.buf_overrun++;

		}

		tty_flip_buffer_push(port);



		start_rx_dma(sport);