netdev - Re: [PATCH net-next v4 1/8] net: txgbe: Add software nodes to support phylink

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Date:   Sun, 23 Apr 2023 21:47:25 +0200
From:   Simon Horman <simon.horman@...igine.com>
To:     Jiawen Wu <jiawenwu@...stnetic.com>
Cc:     netdev@...r.kernel.org, andrew@...n.ch, linux@...linux.org.uk,
        jarkko.nikula@...ux.intel.com, olteanv@...il.com,
        andriy.shevchenko@...ux.intel.com, hkallweit1@...il.com,
        linux-i2c@...r.kernel.org, linux-gpio@...r.kernel.org,
        mengyuanlou@...-swift.com
Subject: Re: [PATCH net-next v4 1/8] net: txgbe: Add software nodes to
 support phylink

On Sat, Apr 22, 2023 at 12:56:14PM +0800, Jiawen Wu wrote:
> Register software nodes for GPIO, I2C, SFP and PHYLINK. Define the
> device properties.
> 
> Signed-off-by: Jiawen Wu <jiawenwu@...stnetic.com>

...

> @@ -513,6 +514,7 @@ static int txgbe_probe(struct pci_dev *pdev,
>  	struct net_device *netdev;
>  	int err, expected_gts;
>  	struct wx *wx = NULL;
> +	struct txgbe *txgbe;
>  
>  	u16 eeprom_verh = 0, eeprom_verl = 0, offset = 0;
>  	u16 eeprom_cfg_blkh = 0, eeprom_cfg_blkl = 0;
> @@ -663,10 +665,21 @@ static int txgbe_probe(struct pci_dev *pdev,
>  			 "0x%08x", etrack_id);
>  	}
>  
> -	err = register_netdev(netdev);
> +	txgbe = devm_kzalloc(&pdev->dev, sizeof(*txgbe), GFP_KERNEL);
> +	if (!txgbe)
> +		return -ENOMEM;

Hi Jiawen,

I strongly suspect this needs to be a goto to unwind.
Probably goto err_release_hw.

> +
> +	txgbe->wx = wx;
> +	wx->priv = txgbe;
> +
> +	err = txgbe_init_phy(txgbe);
>  	if (err)
>  		goto err_release_hw;
>  
> +	err = register_netdev(netdev);
> +	if (err)
> +		goto err_remove_phy;
> +
>  	pci_set_drvdata(pdev, wx);
>  
>  	netif_tx_stop_all_queues(netdev);
> @@ -694,6 +707,8 @@ static int txgbe_probe(struct pci_dev *pdev,
>  
>  	return 0;
>  
> +err_remove_phy:
> +	txgbe_remove_phy(txgbe);
>  err_release_hw:
>  	wx_clear_interrupt_scheme(wx);
>  	wx_control_hw(wx, false);

...