[PATCH v4 20/25] net: fman: Clean up error handling

From: Sean Anderson
Date: Mon Jul 25 2022 - 11:14:20 EST


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@xxxxxxxx>
Acked-by: Camelia Groza <camelia.groza@xxxxxxx>
---

(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