netdev - Re: [PATCH v3 net-next] lan78xx: Use irq_domain for phy interrupt from USB Int. EP

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Date:   Tue, 01 Nov 2016 12:03:22 -0400 (EDT)
From:   David Miller <davem@...emloft.net>
To:     Woojung.Huh@...rochip.com
Cc:     netdev@...r.kernel.org, f.fainelli@...il.com, andrew@...n.ch,
        UNGLinuxDriver@...rochip.com
Subject: Re: [PATCH v3 net-next] lan78xx: Use irq_domain for phy interrupt
 from USB Int. EP

From: <Woojung.Huh@...rochip.com>
Date: Mon, 31 Oct 2016 21:44:37 +0000

> @@ -2668,6 +2821,13 @@ static int lan78xx_bind(struct lan78xx_net *dev, struct usb_interface *intf)
>  
>  	dev->net->hw_features = dev->net->features;
>  
> +	ret = lan78xx_setup_irq_domain(dev);
> +	if (ret < 0) {
> +		netdev_warn(dev->net,
> +			    "lan78xx_setup_irq_domain() failed : %d", ret);
> +		return ret;
> +	}
> +

This error path leaks the memory allocated at the beginning of this function.

That would normally be freed up by lan78xx_unbind() but the caller will not
invoke that if lan78xx_bind() fails so you have to take care of the kfree
here.