linux-kernel - Re: [RFC PATCH 1/4] serial: uartps: Remove console

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Message-ID: <20170721154720.ifjsn3og6apqi7mv@xsjsorenbubuntu.xilinx.com>
Date:   Fri, 21 Jul 2017 08:47:20 -0700
From:   Sören Brinkmann <soren.brinkmann@...inx.com>
To:     Michal Simek <michal.simek@...inx.com>
CC:     <linux-kernel@...r.kernel.org>, <monstr@...str.eu>,
        Alan Cox <gnomes@...rguk.ukuu.org.uk>,
        Jiri Slaby <jslaby@...e.com>, <linux-serial@...r.kernel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [RFC PATCH 1/4] serial: uartps: Remove console_initcall from the
 driver

On Fri, 2017-07-21 at 11:32:24 +0200, Michal Simek wrote:
> register_console() is called from
> uart_add_one_port()->uart_configure_port()
> that's why register_console() is called twice.
> 
> This patch remove console_initcall to call register_console() only from
> one location.
> 
> Also based on my tests cdns_uart_console_setup() is not called
> from the first register_console() call.
> 
> Signed-off-by: Michal Simek <michal.simek@...inx.com>
> ---
> 
> I am not quite sure about this because console_initcall is called
> early but I can see any difference in usage.
> pl011 is not calling this but others are doing it.

Doesn't this break early console/printk? I would expect that the UART
initialization may happen later than console init.

	Sören