netdev - Re: [PATCH 1/2] net: smsc911x: Fix register_netdev, phy startup, driver unload ordering

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Message-ID: <20160901165806.GC10951@lunn.ch>
Date:   Thu, 1 Sep 2016 18:58:06 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Jeremy Linton <jeremy.linton@....com>
Cc:     netdev@...r.kernel.org, steve.glendinning@...well.net,
        sergei.shtylyov@...entembedded.com
Subject: Re: [PATCH 1/2] net: smsc911x: Fix register_netdev, phy startup,
 driver unload ordering

> @@ -1520,17 +1513,22 @@ static int smsc911x_open(struct net_device *dev)
>  	unsigned int timeout;
>  	unsigned int temp;
>  	unsigned int intcfg;
> +	int retval;
>  
> -	/* if the phy is not yet registered, retry later*/
> +	/* find and start the given phy */
>  	if (!dev->phydev) {
> -		SMSC_WARN(pdata, hw, "phy_dev is NULL");
> -		return -EAGAIN;
> +		if (smsc911x_mii_probe(dev) < 0) {
> +			SMSC_WARN(pdata, probe, "Error starting phy");
> +			retval = -EAGAIN;

smsc911x_mii_probe() returns an error code. It is better to use that,
than -EAGAIN, which is rather odd to start with.

> +			goto out;
> +		}
>  	}
>  
>  	/* Reset the LAN911x */
>  	if (smsc911x_soft_reset(pdata)) {
>  		SMSC_WARN(pdata, hw, "soft reset failed");
> -		return -EIO;
> +		retval = -EIO;
> +		goto mii_free_out;

smsc911x_soft_reset() also returns an error code you should use.

This patch also seems to do quite a few different things. Please can
you break it up into multiple patches.

Thanks
	Andrew