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| author | Manfred Schlaegl <manfred.schlaegl@gmx.at> | 2015-06-20 19:25:35 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-07-23 17:37:53 -0700 |
| commit | 9b289932610edff7d0c11228efbf7a6f81361298 (patch) | |
| tree | e9442cfa39fc6accebc4d63876cdc6d8c8f5df00 /drivers/tty/serial/imx.c | |
| parent | 8a61f0c70ae65c6b70d13228c3120c73d7425a60 (diff) | |
| download | op-kernel-dev-9b289932610edff7d0c11228efbf7a6f81361298.zip op-kernel-dev-9b289932610edff7d0c11228efbf7a6f81361298.tar.gz | |
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: Manfred Schlaegl <manfred.schlaegl@gmx.at>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/imx.c')
| -rw-r--r-- | drivers/tty/serial/imx.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index cddf902..0628fc4 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: @@ -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); |
