linux-kernel - [PATCH net-next v3 33/47] net: fman: Clean up error handling

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Message-Id: <20220715215954.1449214-34-sean.anderson@seco.com>
Date:   Fri, 15 Jul 2022 17:59:40 -0400
From:   Sean Anderson <sean.anderson@...o.com>
To:     "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Madalin Bucur <madalin.bucur@....com>, netdev@...r.kernel.org
Cc:     Paolo Abeni <pabeni@...hat.com>,
        Eric Dumazet <edumazet@...gle.com>,
        linux-arm-kernel@...ts.infradead.org,
        Russell King <linux@...linux.org.uk>,
        linux-kernel@...r.kernel.org,
        Sean Anderson <sean.anderson@...o.com>
Subject: [PATCH net-next v3 33/47] net: fman: Clean up error handling

This removes the _return label, since something like

	err = -EFOO;
	goto _return;

can be replaced by the briefer

	return -EFOO;

Additionally, this skips going to _return_of_node_put when dev_node has
already been put (preventing a double put).

Signed-off-by: Sean Anderson <sean.anderson@...o.com>
---

(no changes since v1)

 drivers/net/ethernet/freescale/fman/mac.c | 43 ++++++++---------------
 1 file changed, 15 insertions(+), 28 deletions(-)

diff --git a/drivers/net/ethernet/freescale/fman/mac.c b/drivers/net/ethernet/freescale/fman/mac.c
index 66a3742a862b..7b7526fd7da3 100644
--- a/drivers/net/ethernet/freescale/fman/mac.c
+++ b/drivers/net/ethernet/freescale/fman/mac.c
@@ -291,15 +291,11 @@ static int mac_probe(struct platform_device *_of_dev)
 	init = of_device_get_match_data(dev);
 
 	mac_dev = devm_kzalloc(dev, sizeof(*mac_dev), GFP_KERNEL);
-	if (!mac_dev) {
-		err = -ENOMEM;
-		goto _return;
-	}
+	if (!mac_dev)
+		return -ENOMEM;
 	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
-	if (!priv) {
-		err = -ENOMEM;
-		goto _return;
-	}
+	if (!priv)
+		return -ENOMEM;
 
 	/* Save private information */
 	mac_dev->priv = priv;
@@ -312,8 +308,7 @@ static int mac_probe(struct platform_device *_of_dev)
 	if (!dev_node) {
 		dev_err(dev, "of_get_parent(%pOF) failed\n",
 			mac_node);
-		err = -EINVAL;
-		goto _return_of_node_put;
+		return -EINVAL;
 	}
 
 	of_dev = of_find_device_by_node(dev_node);
@@ -352,28 +347,24 @@ static int mac_probe(struct platform_device *_of_dev)
 	err = devm_request_resource(dev, fman_get_mem_region(priv->fman), res);
 	if (err) {
 		dev_err_probe(dev, err, "could not request resource\n");
-		goto _return_of_node_put;
+		return err;
 	}
 
 	mac_dev->vaddr = devm_ioremap(dev, res->start, resource_size(res));
 	if (!mac_dev->vaddr) {
 		dev_err(dev, "devm_ioremap() failed\n");
-		err = -EIO;
-		goto _return_of_node_put;
+		return -EIO;
 	}
 	mac_dev->vaddr_end = mac_dev->vaddr + resource_size(res);
 
-	if (!of_device_is_available(mac_node)) {
-		err = -ENODEV;
-		goto _return_of_node_put;
-	}
+	if (!of_device_is_available(mac_node))
+		return -ENODEV;
 
 	/* Get the cell-index */
 	err = of_property_read_u32(mac_node, "cell-index", &val);
 	if (err) {
 		dev_err(dev, "failed to read cell-index for %pOF\n", mac_node);
-		err = -EINVAL;
-		goto _return_of_node_put;
+		return -EINVAL;
 	}
 	priv->cell_index = (u8)val;
 
@@ -387,15 +378,13 @@ static int mac_probe(struct platform_device *_of_dev)
 	if (unlikely(nph < 0)) {
 		dev_err(dev, "of_count_phandle_with_args(%pOF, fsl,fman-ports) failed\n",
 			mac_node);
-		err = nph;
-		goto _return_of_node_put;
+		return nph;
 	}
 
 	if (nph != ARRAY_SIZE(mac_dev->port)) {
 		dev_err(dev, "Not supported number of fman-ports handles of mac node %pOF from device tree\n",
 			mac_node);
-		err = -EINVAL;
-		goto _return_of_node_put;
+		return -EINVAL;
 	}
 
 	for (i = 0; i < ARRAY_SIZE(mac_dev->port); i++) {
@@ -404,8 +393,7 @@ static int mac_probe(struct platform_device *_of_dev)
 		if (!dev_node) {
 			dev_err(dev, "of_parse_phandle(%pOF, fsl,fman-ports) failed\n",
 				mac_node);
-			err = -EINVAL;
-			goto _return_of_node_put;
+			return -EINVAL;
 		}
 
 		of_dev = of_find_device_by_node(dev_node);
@@ -465,7 +453,7 @@ static int mac_probe(struct platform_device *_of_dev)
 	if (err < 0) {
 		dev_err(dev, "mac_dev->init() = %d\n", err);
 		of_node_put(mac_dev->phy_node);
-		goto _return_of_node_put;
+		return err;
 	}
 
 	/* pause frame autonegotiation enabled */
@@ -492,11 +480,10 @@ static int mac_probe(struct platform_device *_of_dev)
 		priv->eth_dev = NULL;
 	}
 
-	goto _return;
+	return err;
 
 _return_of_node_put:
 	of_node_put(dev_node);
-_return:
 	return err;
 }
 
-- 
2.35.1.1320.gc452695387.dirty