Re: [PATCH] serial: 8250: Clear dma tx_err unconditionally

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On Fri, Aug 19, 2022 at 2:04 PM Ilpo Järvinen
<ilpo.jarvinen@xxxxxxxxxxxxxxx> wrote:
>
> No need to check non-zeroness first and then clear. Just set to zero
> unconditionally.

Harmless micro-optimization,
Acked-by: Andy Shevchenko <andy.shevchenko@xxxxxxxxx>

> Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx>
>
> ---
>  drivers/tty/serial/8250/8250_dma.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/drivers/tty/serial/8250/8250_dma.c b/drivers/tty/serial/8250/8250_dma.c
> index a8dba4a0a8fb..d99020fd3427 100644
> --- a/drivers/tty/serial/8250/8250_dma.c
> +++ b/drivers/tty/serial/8250/8250_dma.c
> @@ -107,8 +107,7 @@ int serial8250_tx_dma(struct uart_8250_port *p)
>
>         dma_async_issue_pending(dma->txchan);
>         serial8250_clear_THRI(p);
> -       if (dma->tx_err)
> -               dma->tx_err = 0;
> +       dma->tx_err = 0;
>
>         return 0;
>  err:
>
> --
> tg: (568035b01cfb..) 8250dma/tx_err-clear-unconditionally (depends on: tty-next)



-- 
With Best Regards,
Andy Shevchenko




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