net: Microchip encx24j600 driver

Hello Jon Ringle,

This is a semi-automatic email about new static checker warnings.

The patch 04fbfce7a222: "net: Microchip encx24j600 driver" from Oct 1, 2015, leads to the following Smatch complaint:

drivers/net/ethernet/microchip/encx24j600.c:313 encx24j600_tx_complete()

	 warn: variable dereferenced before check 'priv->tx_skb' (see line 307)

drivers/net/ethernet/microchip/encx24j600.c
306

   307		dev->stats.tx_bytes += priv->tx_skb->len;
                                       ^^^^^^^^^^^^

Unchecked dereference.

308
309 encx24j600_clr_bits(priv, EIR, TXIF | TXABTIF);
310
311 netif_dbg(priv, tx_done, dev, "TX Done%s\n", err ? ": Err" : "");
312

   313		if (priv->tx_skb) {
                    ^^^^^^^^^^^^

Too late.

   314			dev_kfree_skb(priv->tx_skb);
   315			priv->tx_skb = NULL;

regards,
dan carpenter