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Message-ID: <069f5cd3309e83d13c74929f240720b232ea7251.camel@linux.intel.com>
Subject: Re: [PATCH 1/4] serial: 8250: Copy em485 from port to real port.
From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: Giulio Benetti <giulio.benetti@micronovasrl.com>
Cc: matwey.kornilov@gmail.com,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Jiri Slaby <jslaby@suse.com>,
        Matthias Brugger <mbrugger@suse.com>,
        Kees Cook <keescook@chromium.org>,
        Allen Pais <allen.lkml@gmail.com>, Sean Young <sean@mess.org>,
        "open list:SERIAL DRIVERS" <linux-serial@vger.kernel.org>,
        open list <linux-kernel@vger.kernel.org>
Date: Wed, 06 Jun 2018 14:56:34 +0300
In-Reply-To: <20180606094942.71190-4-giulio.benetti@micronovasrl.com>
References: <CAJs94EZqdQAQG+inWvj89FCQtv06LxhY_J4YgNmK8mtvgDTchQ@mail.gmail.com>
         <20180606094942.71190-1-giulio.benetti@micronovasrl.com>
         <20180606094942.71190-4-giulio.benetti@micronovasrl.com>
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On Wed, 2018-06-06 at 11:49 +0200, Giulio Benetti wrote:
> em485 gets lost during serial8250_register_8250_port().
> 
> Copy em485 to final uart port.
> 

Is it needed at all?

The individual driver decides either to use software emulation (and
calls explicitly serial8250_em485_init() for that) or do HW assisted
stuff.

> Signed-off-by: Giulio Benetti <giulio.benetti@micronovasrl.com>
> ---
>  drivers/tty/serial/8250/8250_core.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/tty/serial/8250/8250_core.c
> b/drivers/tty/serial/8250/8250_core.c
> index 9342fc2ee7df..c8c2b260c681 100644
> --- a/drivers/tty/serial/8250/8250_core.c
> +++ b/drivers/tty/serial/8250/8250_core.c
> @@ -994,6 +994,7 @@ int serial8250_register_8250_port(struct
> uart_8250_port *up)
>  		uart->port.rs485_config	= up-
> >port.rs485_config;
>  		uart->port.rs485	= up->port.rs485;
>  		uart->dma		= up->dma;
> +		uart->em485		= up->em485;
>  
>  		/* Take tx_loadsz from fifosize if it wasn't set
> separately */
>  		if (uart->port.fifosize && !uart->tx_loadsz)

-- 
Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Intel Finland Oy