linux-kernel - Re: [Kgdb-bugreport] [PATCH 4/5] KGDB-8250: refactor configuration

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Date:	Fri, 01 Feb 2008 16:59:24 +0300
From:	Sergei Shtylyov <sshtylyov@...mvista.com>
To:	Jan Kiszka <jan.kiszka@....de>
Cc:	Jason Wessel <jason.wessel@...driver.com>,
	kgdb-bugreport@...ts.sourceforge.net, Ingo Molnar <mingo@...e.hu>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [Kgdb-bugreport] [PATCH 4/5] KGDB-8250: refactor configuration

Hello.

Jan Kiszka wrote:

> Sorry, previous version was missing some __init[data] attributes which
> were dropped in an intermediate stage. Here comes an updated patch:

> <---snip--->

> This major refactoring of the quite complex kgdb8250 configuration does
> the following:

>  - ensures that static configurations according to SERIAL_PORT_DFNS are
>    always loaded first
>  - tries to pull more accurate configuration via serial8250_get_port_def
>    if simple-config is used
>  - detects empty/invalid simple-configs
>  - enforces KGDB_PORT_NUM <= SERIAL_8250_NR_UARTS at kconfig level
>  - removes kgdb8250_add_port and its hook in serial_core (calling
>    serial8250_get_port_def in demand should provide us the same
>    information)

    You left powerpc-lite.patch broken with this change as it has multiple 
calls to kgdb8250_add_port()...

> Signed-off-by: Jan Kiszka <jan.kiszka@....de>

> Index: b/drivers/serial/serial_core.c
> ===================================================================
> --- a/drivers/serial/serial_core.c
> +++ b/drivers/serial/serial_core.c
[...]
> @@ -2370,12 +2369,6 @@ int uart_add_one_port(struct uart_driver
>  	 */
>  	port->flags &= ~UPF_DEAD;
>  
> -#if defined(CONFIG_KGDB_8250)
> -	/* Add any 8250-like ports we find later. */
> -	if (port->type <= PORT_MAX_8250)
> -		kgdb8250_add_port(port->line, port);
> -#endif
> -

    I'm afraid this wasn't correct from the very start since this can add 
ports with .iotype that 8250_kgdb.c does not support. So, nothing to regret 
here...

WBR, Sergei
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