linux-kernel - Re: [PATCH] tty: serial: sa1100.c: use UPIO_MEM rather than SERIAL_IO

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Date:	Wed, 28 Oct 2015 09:45:14 -0400
From:	Peter Hurley <peter@...leysoftware.com>
To:	Saurabh Sengar <saurabh.truth@...il.com>
Cc:	gregkh@...uxfoundation.org, jslaby@...e.com,
	linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] tty: serial: sa1100.c: use UPIO_MEM rather than
 SERIAL_IO_MEM

Hi Saurabh,

On 10/27/2015 03:46 AM, Saurabh Sengar wrote:
> use UPIO_MEM rather then SERIAL_IO_MEM.
> both have the same value
> 
> Signed-off-by: Saurabh Sengar <saurabh.truth@...il.com>
> ---
>  drivers/tty/serial/sa1100.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/tty/serial/sa1100.c b/drivers/tty/serial/sa1100.c
> index fd3d132..283c7e0 100644
> --- a/drivers/tty/serial/sa1100.c
> +++ b/drivers/tty/serial/sa1100.c
> @@ -579,7 +579,7 @@ sa1100_verify_port(struct uart_port *port, struct serial_struct *ser)
>  		ret = -EINVAL;
>  	if (sport->port.irq != ser->irq)
>  		ret = -EINVAL;
> -	if (ser->io_type != SERIAL_IO_MEM)
> +	if (ser->io_type != UPIO_MEM)

SERIAL_IO_* io_type defines are the appropriate constants for the
struct serial_struct::io_type field. Both are defined in the
uapi header, include/uapi/linux/serial.h

UPIO_* io_type defines are the appropriate constants for the
struct uart_port::io_type field. Both are defined in the kernel
header, include/kernel/serial_core.h

I defined the UPIO_* io_types in terms of SERIAL_IO_* because
userspace breakage was occurring as contributors were changing
the UPIO_* constant values.


Regards,
Peter Hurley


>  		ret = -EINVAL;
>  	if (sport->port.uartclk / 16 != ser->baud_base)
>  		ret = -EINVAL;
> 

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