linux-kernel - [PATCH net-next 1/8] net: smsc911x: use devm_platform_ioremap

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Message-ID: <20240930224056.354349-2-rosenp@gmail.com>
Date: Mon, 30 Sep 2024 15:40:49 -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,
	steve.glendinning@...well.net
Subject: [PATCH net-next 1/8] net: smsc911x: use devm_platform_ioremap_resource

Allows removal of a bunch of code relating to grabbing resources.

Signed-off-by: Rosen Penev <rosenp@...il.com>
---
 drivers/net/ethernet/smsc/smsc911x.c | 47 +++++-----------------------
 1 file changed, 7 insertions(+), 40 deletions(-)

diff --git a/drivers/net/ethernet/smsc/smsc911x.c b/drivers/net/ethernet/smsc/smsc911x.c
index 74f1ccc96459..3d4356df0070 100644
--- a/drivers/net/ethernet/smsc/smsc911x.c
+++ b/drivers/net/ethernet/smsc/smsc911x.c
@@ -2319,7 +2319,6 @@ static void smsc911x_drv_remove(struct platform_device *pdev)
 {
 	struct net_device *dev;
 	struct smsc911x_data *pdata;
-	struct resource *res;
 
 	dev = platform_get_drvdata(pdev);
 	BUG_ON(!dev);
@@ -2334,15 +2333,6 @@ static void smsc911x_drv_remove(struct platform_device *pdev)
 	mdiobus_unregister(pdata->mii_bus);
 	mdiobus_free(pdata->mii_bus);
 
-	res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
-					   "smsc911x-memory");
-	if (!res)
-		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-
-	release_mem_region(res->start, resource_size(res));
-
-	iounmap(pdata->ioaddr);
-
 	(void)smsc911x_disable_resources(pdev);
 	smsc911x_free_resources(pdev);
 
@@ -2414,21 +2404,9 @@ static int smsc911x_drv_probe(struct platform_device *pdev)
 	struct net_device *dev;
 	struct smsc911x_data *pdata;
 	struct smsc911x_platform_config *config = dev_get_platdata(&pdev->dev);
-	struct resource *res;
-	int res_size, irq;
+	int irq;
 	int retval;
 
-	res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
-					   "smsc911x-memory");
-	if (!res)
-		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		pr_warn("Could not allocate resource\n");
-		retval = -ENODEV;
-		goto out_0;
-	}
-	res_size = resource_size(res);
-
 	irq = platform_get_irq(pdev, 0);
 	if (irq == -EPROBE_DEFER) {
 		retval = -EPROBE_DEFER;
@@ -2439,24 +2417,17 @@ static int smsc911x_drv_probe(struct platform_device *pdev)
 		goto out_0;
 	}
 
-	if (!request_mem_region(res->start, res_size, SMSC_CHIPNAME)) {
-		retval = -EBUSY;
-		goto out_0;
-	}
-
 	dev = alloc_etherdev(sizeof(struct smsc911x_data));
-	if (!dev) {
-		retval = -ENOMEM;
-		goto out_release_io_1;
-	}
+	if (!dev)
+		return -ENOMEM;
 
 	SET_NETDEV_DEV(dev, &pdev->dev);
 
 	pdata = netdev_priv(dev);
 	dev->irq = irq;
-	pdata->ioaddr = ioremap(res->start, res_size);
-	if (!pdata->ioaddr) {
-		retval = -ENOMEM;
+	pdata->ioaddr = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(pdata->ioaddr)) {
+		retval = PTR_ERR(pdata->ioaddr);
 		goto out_ioremap_fail;
 	}
 
@@ -2467,7 +2438,7 @@ static int smsc911x_drv_probe(struct platform_device *pdev)
 
 	retval = smsc911x_request_resources(pdev);
 	if (retval)
-		goto out_request_resources_fail;
+		goto out_ioremap_fail;
 
 	retval = smsc911x_enable_resources(pdev);
 	if (retval)
@@ -2564,12 +2535,8 @@ static int smsc911x_drv_probe(struct platform_device *pdev)
 	(void)smsc911x_disable_resources(pdev);
 out_enable_resources_fail:
 	smsc911x_free_resources(pdev);
-out_request_resources_fail:
-	iounmap(pdata->ioaddr);
 out_ioremap_fail:
 	free_netdev(dev);
-out_release_io_1:
-	release_mem_region(res->start, resource_size(res));
 out_0:
 	return retval;
 }
-- 
2.46.2