linux-kernel - Re: [PATCH v2 -next 10/13] serial: earlycon: Allow earlycon params with name only

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Date:	Thu, 5 Mar 2015 09:46:44 -0600
From:	Rob Herring <robh@...nel.org>
To:	Peter Hurley <peter@...leysoftware.com>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jiri Slaby <jslaby@...e.cz>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-serial@...r.kernel.org" <linux-serial@...r.kernel.org>
Subject: Re: [PATCH v2 -next 10/13] serial: earlycon: Allow earlycon params
 with name only

On Sun, Mar 1, 2015 at 10:05 AM, Peter Hurley <peter@...leysoftware.com> wrote:
> Allow earlycon param strings of the form
>    earlycon=<name>

Humm, that should already be the case with ARM semihosting (smh).

Rob

>
> Signed-off-by: Peter Hurley <peter@...leysoftware.com>
> ---
>  drivers/tty/serial/earlycon.c | 11 +++++++----
>  1 file changed, 7 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/tty/serial/earlycon.c b/drivers/tty/serial/earlycon.c
> index da5e8c8..025ea01 100644
> --- a/drivers/tty/serial/earlycon.c
> +++ b/drivers/tty/serial/earlycon.c
> @@ -109,13 +109,16 @@ int __init setup_earlycon(char *buf, const char *match,
>         len = strlen(match);
>         if (strncmp(buf, match, len))
>                 return 0;
> -       if (buf[len] && (buf[len] != ','))
> -               return 0;
>
> -       buf += len + 1;
> +       if (buf[len]) {
> +               if (buf[len] != ',')
> +                       return 0;
> +               buf += len + 1;
> +       } else
> +               buf = NULL;
>
>         /* On parsing error, pass the options buf to the setup function */
> -       if (!parse_options(&early_console_dev, buf))
> +       if (buf && !parse_options(&early_console_dev, buf))
>                 buf = NULL;
>
>         port->uartclk = BASE_BAUD * 16;
> --
> 2.3.0
>
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