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.schla...@gmx.at>
---
drivers/tty/serial/imx.c | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)
diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index 8825039..384cf1d 100644
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -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:
@@ -922,8 +923,13 @@ 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);
--
1.7.10.4
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