[PATCH -next] tty: of_serial: fix return value check in of_platform_serial_setup()

[Murali Karicheri]

On 11/01/2012 01:27 AM, Wei Yongjun wrote:
> From: Wei Yongjun <yongjun_wei at trendmicro.com.cn>
>
> In case of error, the function clk_get() returns ERR_PTR()
> and never returns NULL. The NULL test in the return value
> check should be replaced with IS_ERR().
>
> dpatch engine is used to auto generate this patch.
> (https://github.com/weiyj/dpatch)
>
> Signed-off-by: Wei Yongjun <yongjun_wei at trendmicro.com.cn>
> ---
>   drivers/tty/serial/of_serial.c | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/tty/serial/of_serial.c b/drivers/tty/serial/of_serial.c
> index 533ccfe..b9fdccb 100644
> --- a/drivers/tty/serial/of_serial.c
> +++ b/drivers/tty/serial/of_serial.c
> @@ -66,10 +66,10 @@ static int __devinit of_platform_serial_setup(struct platform_device *ofdev,
>   
>   		/* Get clk rate through clk driver if present */
>   		info->clk = clk_get(&ofdev->dev, NULL);
> -		if (info->clk == NULL) {
> +		if (IS_ERR(info->clk)) {
>   			dev_warn(&ofdev->dev,
>   				"clk or clock-frequency not defined\n");
> -			return -ENODEV;
> +			return PTR_ERR(info->clk);
I think this is wrong. it should return -ENODEV;
Murali
>   		}
>   
>   		clk_prepare_enable(info->clk);
>
>
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