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Commit 1efb597d authored by Zhao Qiang's avatar Zhao Qiang Committed by David S. Miller
Browse files

wan/fsl_ucc_hdlc: rewrite error handling to make it clearer 



It was used err_xxx for labeled statement, it is
not easy to understand, now use free_xxx for labeled
statement.

Signed-off-by: default avatarZhao Qiang <qiang.zhao@nxp.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 18210510

drivers/net/wan/fsl_ucc_hdlc.c

+27 −28
Original line number Diff line number Diff line
@@ -143,7 +143,7 @@ static int uhdlc_init(struct ucc_hdlc_private *priv) 
	if (!priv->rx_bd_base) {

		dev_err(priv->dev, "Cannot allocate MURAM memory for RxBDs\n");

		ret = -ENOMEM;

		goto rxbd_alloc_error;

		goto free_uccf;

	}



	/* Alloc Tx BD */
@@ -154,7 +154,7 @@ static int uhdlc_init(struct ucc_hdlc_private *priv) 
	if (!priv->tx_bd_base) {

		dev_err(priv->dev, "Cannot allocate MURAM memory for TxBDs\n");

		ret = -ENOMEM;

		goto txbd_alloc_error;

		goto free_rx_bd;

	}



	/* Alloc parameter ram for ucc hdlc */
@@ -164,18 +164,18 @@ static int uhdlc_init(struct ucc_hdlc_private *priv) 
	if (priv->ucc_pram_offset < 0) {

		dev_err(priv->dev, "Can not allocate MURAM for hdlc prameter.\n");

		ret = -ENOMEM;

		goto pram_alloc_error;

		goto free_tx_bd;

	}



	priv->rx_skbuff = kzalloc(priv->rx_ring_size * sizeof(*priv->rx_skbuff),

				  GFP_KERNEL);

	if (!priv->rx_skbuff)

		goto rx_skb_alloc_error;

		goto free_ucc_pram;



	priv->tx_skbuff = kzalloc(priv->tx_ring_size * sizeof(*priv->tx_skbuff),

				  GFP_KERNEL);

	if (!priv->tx_skbuff)

		goto tx_skb_alloc_error;

		goto free_rx_skbuff;



	priv->skb_curtx = 0;

	priv->skb_dirtytx = 0;
@@ -200,14 +200,14 @@ static int uhdlc_init(struct ucc_hdlc_private *priv) 
	if (riptr < 0) {

		dev_err(priv->dev, "Cannot allocate MURAM mem for Receive internal temp data pointer\n");

		ret = -ENOMEM;

		goto riptr_alloc_error;

		goto free_tx_skbuff;

	}



	tiptr = qe_muram_alloc(32, 32);

	if (tiptr < 0) {

		dev_err(priv->dev, "Cannot allocate MURAM mem for Transmit internal temp data pointer\n");

		ret = -ENOMEM;

		goto tiptr_alloc_error;

		goto free_riptr;

	}



	/* Set RIPTR, TIPTR */
@@ -247,7 +247,7 @@ static int uhdlc_init(struct ucc_hdlc_private *priv) 
	if (!bd_buffer) {

		dev_err(priv->dev, "Could not allocate buffer descriptors\n");

		ret = -ENOMEM;

		goto bd_alloc_error;

		goto free_tiptr;

	}



	memset(bd_buffer, 0, (RX_BD_RING_LEN + TX_BD_RING_LEN)
@@ -283,25 +283,25 @@ static int uhdlc_init(struct ucc_hdlc_private *priv) 


	return 0;



bd_alloc_error:

free_tiptr:

	qe_muram_free(tiptr);

tiptr_alloc_error:

free_riptr:

	qe_muram_free(riptr);

riptr_alloc_error:

free_tx_skbuff:

	kfree(priv->tx_skbuff);

tx_skb_alloc_error:

free_rx_skbuff:

	kfree(priv->rx_skbuff);

rx_skb_alloc_error:

free_ucc_pram:

	qe_muram_free(priv->ucc_pram_offset);

pram_alloc_error:

free_tx_bd:

	dma_free_coherent(priv->dev,

			  TX_BD_RING_LEN * sizeof(struct qe_bd),

			  priv->tx_bd_base, priv->dma_tx_bd);

txbd_alloc_error:

free_rx_bd:

	dma_free_coherent(priv->dev,

			  RX_BD_RING_LEN * sizeof(struct qe_bd),

			  priv->rx_bd_base, priv->dma_rx_bd);

rxbd_alloc_error:

free_uccf:

	ucc_fast_free(priv->uccf);



	return ret;
@@ -1067,9 +1067,7 @@ static int ucc_hdlc_probe(struct platform_device *pdev) 


	uhdlc_priv = kzalloc(sizeof(*uhdlc_priv), GFP_KERNEL);

	if (!uhdlc_priv) {

		ret = -ENOMEM;

		dev_err(&pdev->dev, "No mem to alloc hdlc private data\n");

		goto err_alloc_priv;

		return -ENOMEM;

	}



	dev_set_drvdata(&pdev->dev, uhdlc_priv);
@@ -1087,25 +1085,25 @@ static int ucc_hdlc_probe(struct platform_device *pdev) 
		if (!utdm) {

			ret = -ENOMEM;

			dev_err(&pdev->dev, "No mem to alloc ucc tdm data\n");

			goto err_alloc_utdm;

			goto free_uhdlc_priv;

		}

		uhdlc_priv->utdm = utdm;

		ret = ucc_of_parse_tdm(np, utdm, ut_info);

		if (ret)

			goto err_miss_tsa_property;

			goto free_utdm;

	}



	ret = uhdlc_init(uhdlc_priv);

	if (ret) {

		dev_err(&pdev->dev, "Failed to init uhdlc\n");

		goto err_hdlc_init;

		goto free_utdm;

	}



	dev = alloc_hdlcdev(uhdlc_priv);

	if (!dev) {

		ret = -ENOMEM;

		pr_err("ucc_hdlc: unable to allocate memory\n");

		goto err_hdlc_init;

		goto undo_uhdlc_init;

	}



	uhdlc_priv->ndev = dev;
@@ -1119,18 +1117,19 @@ static int ucc_hdlc_probe(struct platform_device *pdev) 
		ret = -ENOBUFS;

		pr_err("ucc_hdlc: unable to register hdlc device\n");

		free_netdev(dev);

		goto err_hdlc_init;

		goto free_dev;

	}



	return 0;



err_hdlc_init:

err_miss_tsa_property:

free_dev:

	free_netdev(dev);

undo_uhdlc_init:

free_utdm:

	if (uhdlc_priv->tsa)

		kfree(utdm);

err_alloc_utdm:

free_uhdlc_priv:

	kfree(uhdlc_priv);

err_alloc_priv:

	return ret;

}