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SubjectRe: [PATCH] tty: serial: fsl_lpuart: count tty buffer overruns
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On 11. 01. 22, 7:10, Sherry Sun wrote:
> Added support for counting the tty buffer overruns in fsl_lpuart driver
> like other uart drivers.
>
> Signed-off-by: Sherry Sun <sherry.sun@nxp.com>
> ---
> drivers/tty/serial/fsl_lpuart.c | 19 +++++++++++++------
> 1 file changed, 13 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c
> index ce3e26144689..1e6f924d8507 100644
> --- a/drivers/tty/serial/fsl_lpuart.c
> +++ b/drivers/tty/serial/fsl_lpuart.c
...
> @@ -1117,6 +1119,7 @@ static void lpuart_copy_rx_to_tty(struct lpuart_port *sport)
> struct circ_buf *ring = &sport->rx_ring;
> unsigned long flags;
> int count = 0;
> + unsigned int copied = 0;
>
> if (lpuart_is_32(sport)) {
> unsigned long sr = lpuart32_read(&sport->port, UARTSTAT);
> @@ -1218,20 +1221,24 @@ static void lpuart_copy_rx_to_tty(struct lpuart_port *sport)
> if (ring->head < ring->tail) {
> count = sport->rx_sgl.length - ring->tail;
>
> - tty_insert_flip_string(port, ring->buf + ring->tail, count);
> + copied = tty_insert_flip_string(port, ring->buf + ring->tail, count);
> + if (copied != count)

Overall looks good, except tty_insert_flip_string returns an int and
count is also an int. Wouldn't it be more consistent to declare copied
as int too? This comparison would be without implicit conversion then.

thanks,
--
js
suse labs

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