serial: imx: count tty buffer overruns (9b289932) · Commits · 戴 / test

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:

Manfred Schlaegl <manfred.schlaegl@gmx.at> Signed-off-by:

Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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);

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