netdev - Re: [patch] tg3: cleanup an error path in tg3_phy_reset_5703_4

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Date:	Wed, 5 Feb 2014 16:10:23 -0800
From:	Nithin Nayak Sujir <nsujir@...adcom.com>
To:	Dan Carpenter <dan.carpenter@...cle.com>
CC:	Michael Chan <mchan@...adcom.com>, <netdev@...r.kernel.org>,
	<kernel-janitors@...r.kernel.org>
Subject: Re: [patch] tg3: cleanup an error path in tg3_phy_reset_5703_4_5()



On 02/05/2014 05:29 AM, Dan Carpenter wrote:
> In the original code, if tg3_readphy() fails then it does an unnecessary
> check to verify "err" is still zero and then returns -EBUSY.
>
> My static checker complains about the unnecessary "if (!err)" check and
> anyway it is better to propagate the -EBUSY error code from
> tg3_readphy() instead of hard coding it here.  And really the original
> code is confusing to look at.
>
> Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
>
> diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c
> index e2ca03e23dc1..c466e12b601e 100644
> --- a/drivers/net/ethernet/broadcom/tg3.c
> +++ b/drivers/net/ethernet/broadcom/tg3.c
> @@ -2609,13 +2609,14 @@ static int tg3_phy_reset_5703_4_5(struct tg3 *tp)
>
>   	tg3_writephy(tp, MII_CTRL1000, phy9_orig);
>
> -	if (!tg3_readphy(tp, MII_TG3_EXT_CTRL, &reg32)) {
> -		reg32 &= ~0x3000;
> -		tg3_writephy(tp, MII_TG3_EXT_CTRL, reg32);
> -	} else if (!err)
> -		err = -EBUSY;
> +	err = tg3_readphy(tp, MII_TG3_EXT_CTRL, &reg32);
> +	if (err)
> +		return err;
>
> -	return err;
> +	reg32 &= ~0x3000;
> +	tg3_writephy(tp, MII_TG3_EXT_CTRL, reg32);
> +
> +	return 0;
>   }
>
>   static void tg3_carrier_off(struct tg3 *tp)
>

Acked-by: Nithin Nayak Sujir <nsujir@...adcom.com>
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