serial: imx: count tty buffer overruns

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Hash: SHA1

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.

- ---

 drivers/tty/serial/imx.c |   12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

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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Your From: line in your email doesn't match this, please fix up and resend.

Same goes for your other serial patch.

thanks,

greg k-h

Hi!

Argh.. Sorry for the mess ..
The patch format was also not ok. I was working on a newly setup system. I'll resend soon.

best regards,
manfred