linux-kernel - Re: [PATCH] serial/imx: propagate error from of_alias_get

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Date:	Thu, 15 Dec 2011 10:06:49 +0800
From:	Shawn Guo <shawn.guo@...escale.com>
To:	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>
CC:	<linux-kernel@...r.kernel.org>, <kernel@...gutronix.de>,
	<linux-arm-kernel@...ts.infradead.org>,
	Shawn Guo <shawn.guo@...aro.org>,
	Alan Cox <alan@...ux.intel.com>,
	Grant Likely <grant.likely@...retlab.ca>,
	Jeremy Kerr <jeremy.kerr@...onical.com>,
	Jason Liu <jason.hui@...aro.org>,
	Sascha Hauer <s.hauer@...gutronix.de>
Subject: Re: [PATCH] serial/imx: propagate error from of_alias_get_id instead
 of using -ENODEV

On Wed, Dec 14, 2011 at 09:26:51PM +0100, Uwe Kleine-König wrote:
> A quick look at of_alias_get_id shows that in the error case it returns
> -ENODEV, too, but still it's better style to propagate the value as is.
> 
> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
> Cc: Shawn Guo <shawn.guo@...aro.org>
> Cc: Alan Cox <alan@...ux.intel.com>
> Cc: Grant Likely <grant.likely@...retlab.ca>
> Cc: Jeremy Kerr <jeremy.kerr@...onical.com>
> Cc: Jason Liu <jason.hui@...aro.org>
> Cc: Sascha Hauer <s.hauer@...gutronix.de>
> ---

Acked-by: Shawn Guo <shawn.guo@...aro.org>

The only errno that of_alias_get_id could return is also -ENODEV though.

Regards,
Shawn

>  drivers/tty/serial/imx.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
> index 163fc90..75c159a 100644
> --- a/drivers/tty/serial/imx.c
> +++ b/drivers/tty/serial/imx.c
> @@ -1301,7 +1301,7 @@ static int serial_imx_probe_dt(struct imx_port *sport,
>  	ret = of_alias_get_id(np, "serial");
>  	if (ret < 0) {
>  		dev_err(&pdev->dev, "failed to get alias id, errno %d\n", ret);
> -		return -ENODEV;
> +		return ret;
>  	}
>  	sport->port.line = ret;
>  
> -- 
> 1.7.7.3

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