Re: [PATCH v3 06/14] serial: liteuart: move tty_flip_buffer_push() out of rx loop

Ilpo Järvinen
2022-11-15T15:38:33Z

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On Sat, 12 Nov 2022, Gabriel Somlo wrote:

> Calling tty_flip_buffer_push() for each individual received character
> is overkill. Move it out of the rx loop, and only call it once per
> set of characters received together.
>
> Signed-off-by: Gabriel Somlo <gsomlo@gmail.com>
> ---
> drivers/tty/serial/liteuart.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/tty/serial/liteuart.c b/drivers/tty/serial/liteuart.c
> index 047d5ad32e13..ff3486860989 100644
> --- a/drivers/tty/serial/liteuart.c
> +++ b/drivers/tty/serial/liteuart.c
> @@ -86,10 +86,10 @@ static void liteuart_timer(struct timer_list *t)
> /* no overflow bits in status */
> if (!(uart_handle_sysrq_char(port, ch)))
> uart_insert_char(port, status, 0, ch, flg);
> -
> - tty_flip_buffer_push(&port->state->port);
> }
>
> + tty_flip_buffer_push(&port->state->port);
> +
> mod_timer(&uart->timer, jiffies + uart_poll_timeout(port));
> }

Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>

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