netdev - [PATCH net-next 3/4] net: ibm: emac: zmii: use devm and dev

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Message-ID: <20240907222147.21723-4-rosenp@gmail.com>
Date: Sat,  7 Sep 2024 15:21:46 -0700
From: Rosen Penev <rosenp@...il.com>
To: netdev@...r.kernel.org
Cc: andrew@...n.ch,
	davem@...emloft.net,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com,
	linux-kernel@...r.kernel.org,
	jacob.e.keller@...el.com,
	horms@...nel.org,
	sd@...asysnail.net,
	chunkeey@...il.com
Subject: [PATCH net-next 3/4] net: ibm: emac: zmii: use devm and dev_err

Simplifies the driver by removing manual frees and using dev_err instead
of printk. pdev->dev has the of_node name in it.

Signed-off-by: Rosen Penev <rosenp@...il.com>
---
 drivers/net/ethernet/ibm/emac/zmii.c | 53 ++++++++++------------------
 1 file changed, 18 insertions(+), 35 deletions(-)

diff --git a/drivers/net/ethernet/ibm/emac/zmii.c b/drivers/net/ethernet/ibm/emac/zmii.c
index 26e86cdee2f6..1e6c3169ee4d 100644
--- a/drivers/net/ethernet/ibm/emac/zmii.c
+++ b/drivers/net/ethernet/ibm/emac/zmii.c
@@ -230,34 +230,33 @@ void *zmii_dump_regs(struct platform_device *ofdev, void *buf)
 	return regs + 1;
 }
 
-static int zmii_probe(struct platform_device *ofdev)
+static int zmii_probe(struct platform_device *pdev)
 {
-	struct device_node *np = ofdev->dev.of_node;
+	struct device_node *np = pdev->dev.of_node;
 	struct zmii_instance *dev;
 	struct resource regs;
 	int rc;
 
-	rc = -ENOMEM;
-	dev = kzalloc(sizeof(struct zmii_instance), GFP_KERNEL);
-	if (dev == NULL)
-		goto err_gone;
+	dev = devm_kzalloc(&pdev->dev, sizeof(struct zmii_instance),
+			   GFP_KERNEL);
+	if (!dev)
+		return -ENOMEM;
 
 	mutex_init(&dev->lock);
-	dev->ofdev = ofdev;
+	dev->ofdev = pdev;
 	dev->mode = PHY_INTERFACE_MODE_NA;
 
-	rc = -ENXIO;
-	if (of_address_to_resource(np, 0, &regs)) {
-		printk(KERN_ERR "%pOF: Can't get registers address\n", np);
-		goto err_free;
+	rc = of_address_to_resource(np, 0, &regs);
+	if (rc) {
+		dev_err(&pdev->dev, "can't get registers address");
+		return rc;
 	}
 
-	rc = -ENOMEM;
-	dev->base = (struct zmii_regs __iomem *)ioremap(regs.start,
-						sizeof(struct zmii_regs));
-	if (dev->base == NULL) {
-		printk(KERN_ERR "%pOF: Can't map device registers!\n", np);
-		goto err_free;
+	dev->base =
+		devm_ioremap(&pdev->dev, regs.start, sizeof(struct zmii_regs));
+	if (!dev->base) {
+		dev_err(&pdev->dev, "can't map device registers");
+		return -ENOMEM;
 	}
 
 	/* We may need FER value for autodetection later */
@@ -266,28 +265,13 @@ static int zmii_probe(struct platform_device *ofdev)
 	/* Disable all inputs by default */
 	out_be32(&dev->base->fer, 0);
 
-	printk(KERN_INFO "ZMII %pOF initialized\n", ofdev->dev.of_node);
+	dev_info(&pdev->dev, "initialized");
 	wmb();
-	platform_set_drvdata(ofdev, dev);
+	platform_set_drvdata(pdev, dev);
 
-	return 0;
-
- err_free:
-	kfree(dev);
- err_gone:
 	return rc;
 }
 
-static void zmii_remove(struct platform_device *ofdev)
-{
-	struct zmii_instance *dev = platform_get_drvdata(ofdev);
-
-	WARN_ON(dev->users != 0);
-
-	iounmap(dev->base);
-	kfree(dev);
-}
-
 static const struct of_device_id zmii_match[] =
 {
 	{
@@ -306,7 +290,6 @@ static struct platform_driver zmii_driver = {
 		.of_match_table = zmii_match,
 	},
 	.probe = zmii_probe,
-	.remove_new = zmii_remove,
 };
 
 int __init zmii_init(void)
-- 
2.46.0