linux-kernel - Re: [PATCH 2/4] serial: xuartps: Do not handle overrun errors under IGNPAR option

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Date:	Mon, 17 Aug 2015 11:49:43 -0400
From:	Peter Hurley <peter@...leysoftware.com>
To:	Michal Simek <michal.simek@...inx.com>
CC:	linux-kernel@...r.kernel.org, monstr@...str.eu,
	Anirudha Sarangi <anirudha.sarangi@...inx.com>,
	Sören Brinkmann <soren.brinkmann@...inx.com>,
	Jiri Slaby <jslaby@...e.com>, linux-serial@...r.kernel.org,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 2/4] serial: xuartps: Do not handle overrun errors under
 IGNPAR option

On 08/17/2015 03:22 AM, Michal Simek wrote:
> From: Anirudha Sarangi <anirudha.sarangi@...inx.com>
> 
> The existing implementation includes overrun errors under IGNPAR
> option. This patch fixes it by including only parity and framing
> error under IGNPAR option.

The convention adopted by Linux serial drivers is to ignore overrun
errors if both IGNPAR and IGNBRK are set.

Regards,
Peter Hurley

> Signed-off-by: Anirudha Sarangi <anirudh@...inx.com>
> Signed-off-by: Michal Simek <michal.simek@...inx.com>
> ---
> 
>  drivers/tty/serial/xilinx_uartps.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c
> index a3020344ac9d..c4437e8929ff 100644
> --- a/drivers/tty/serial/xilinx_uartps.c
> +++ b/drivers/tty/serial/xilinx_uartps.c
> @@ -691,7 +691,7 @@ static void cdns_uart_set_termios(struct uart_port *port,
>  
>  	if (termios->c_iflag & IGNPAR)
>  		port->ignore_status_mask |= CDNS_UART_IXR_PARITY |
> -			CDNS_UART_IXR_FRAMING | CDNS_UART_IXR_OVERRUN;
> +					    CDNS_UART_IXR_FRAMING;
>  
>  	/* ignore all characters if CREAD is not set */
>  	if ((termios->c_cflag & CREAD) == 0)
> 

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