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SubjectRe: [PATCH 3/3] tty/serial: atmel: add comment for the ring buffer size macro
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Le 12/05/2016 17:37, Ludovic Desroches a écrit :
> There is a macro named ATMEL_SERIAL_RINGSIZE which suggesting that it
> corresponds to the real size of the ring buffer. Let warn people that
> there is a factor of four since allocation size is
> sizeof(struct atmel_uart_char) * ATMEL_SERIAL_RINGSIZE.
>
> Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>

Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>

Thanks!

> ---
> drivers/tty/serial/atmel_serial.c | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c
> index 6c1ec7d..8570163 100644
> --- a/drivers/tty/serial/atmel_serial.c
> +++ b/drivers/tty/serial/atmel_serial.c
> @@ -108,6 +108,12 @@ struct atmel_uart_char {
> u16 ch;
> };
>
> +/*
> + * Be careful, the real size of the ring buffer is
> + * sizeof(atmel_uart_char) * ATMEL_SERIAL_RINGSIZE. It means that ring buffer
> + * can contain up to 1024 characters in PIO mode and up to 4096 characters in
> + * DMA mode.
> + */
> #define ATMEL_SERIAL_RINGSIZE 1024
>
> /*
>


--
Nicolas Ferre

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