netdev - [PATCH v6 net-next 02/10] net: korina: Use devres functions

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Message-Id: <20210418221949.130779-3-tsbogend@alpha.franken.de>
Date:   Mon, 19 Apr 2021 00:19:40 +0200
From:   Thomas Bogendoerfer <tsbogend@...ha.franken.de>
To:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Rob Herring <robh+dt@...nel.org>, netdev@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mips@...r.kernel.org
Cc:     Andrew Lunn <andrew@...n.ch>
Subject: [PATCH v6 net-next 02/10] net: korina: Use devres functions

Simplify probe/remove code by using devm_ functions.

Reviewed-by: Andrew Lunn <andrew@...n.ch>
Signed-off-by: Thomas Bogendoerfer <tsbogend@...ha.franken.de>
---
 drivers/net/ethernet/korina.c | 64 ++++++++++++-----------------------
 1 file changed, 21 insertions(+), 43 deletions(-)

diff --git a/drivers/net/ethernet/korina.c b/drivers/net/ethernet/korina.c
index 1b7e1c75ed9e..b56de01f6bb8 100644
--- a/drivers/net/ethernet/korina.c
+++ b/drivers/net/ethernet/korina.c
@@ -105,9 +105,9 @@ enum chain_status {
 
 /* Information that need to be kept for each board. */
 struct korina_private {
-	struct eth_regs *eth_regs;
-	struct dma_reg *rx_dma_regs;
-	struct dma_reg *tx_dma_regs;
+	struct eth_regs __iomem *eth_regs;
+	struct dma_reg __iomem *rx_dma_regs;
+	struct dma_reg __iomem *tx_dma_regs;
 	struct dma_desc *td_ring; /* transmit descriptor ring */
 	struct dma_desc *rd_ring; /* receive descriptor ring  */
 
@@ -1044,10 +1044,10 @@ static int korina_probe(struct platform_device *pdev)
 	struct korina_device *bif = platform_get_drvdata(pdev);
 	struct korina_private *lp;
 	struct net_device *dev;
-	struct resource *r;
+	void __iomem *p;
 	int rc;
 
-	dev = alloc_etherdev(sizeof(struct korina_private));
+	dev = devm_alloc_etherdev(&pdev->dev, sizeof(struct korina_private));
 	if (!dev)
 		return -ENOMEM;
 
@@ -1060,36 +1060,30 @@ static int korina_probe(struct platform_device *pdev)
 	lp->rx_irq = platform_get_irq_byname(pdev, "korina_rx");
 	lp->tx_irq = platform_get_irq_byname(pdev, "korina_tx");
 
-	r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "korina_regs");
-	dev->base_addr = r->start;
-	lp->eth_regs = ioremap(r->start, resource_size(r));
-	if (!lp->eth_regs) {
+	p = devm_platform_ioremap_resource_byname(pdev, "korina_regs");
+	if (!p) {
 		printk(KERN_ERR DRV_NAME ": cannot remap registers\n");
-		rc = -ENXIO;
-		goto probe_err_out;
+		return -ENOMEM;
 	}
+	lp->eth_regs = p;
 
-	r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "korina_dma_rx");
-	lp->rx_dma_regs = ioremap(r->start, resource_size(r));
-	if (!lp->rx_dma_regs) {
+	p = devm_platform_ioremap_resource_byname(pdev, "korina_dma_rx");
+	if (!p) {
 		printk(KERN_ERR DRV_NAME ": cannot remap Rx DMA registers\n");
-		rc = -ENXIO;
-		goto probe_err_dma_rx;
+		return -ENOMEM;
 	}
+	lp->rx_dma_regs = p;
 
-	r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "korina_dma_tx");
-	lp->tx_dma_regs = ioremap(r->start, resource_size(r));
-	if (!lp->tx_dma_regs) {
+	p = devm_platform_ioremap_resource_byname(pdev, "korina_dma_tx");
+	if (!p) {
 		printk(KERN_ERR DRV_NAME ": cannot remap Tx DMA registers\n");
-		rc = -ENXIO;
-		goto probe_err_dma_tx;
+		return -ENOMEM;
 	}
+	lp->tx_dma_regs = p;
 
 	lp->td_ring = kmalloc(TD_RING_SIZE + RD_RING_SIZE, GFP_KERNEL);
-	if (!lp->td_ring) {
-		rc = -ENXIO;
-		goto probe_err_td_ring;
-	}
+	if (!lp->td_ring)
+		return -ENOMEM;
 
 	dma_cache_inv((unsigned long)(lp->td_ring),
 			TD_RING_SIZE + RD_RING_SIZE);
@@ -1119,7 +1113,8 @@ static int korina_probe(struct platform_device *pdev)
 	if (rc < 0) {
 		printk(KERN_ERR DRV_NAME
 			": cannot register net device: %d\n", rc);
-		goto probe_err_register;
+		kfree((struct dma_desc *)KSEG0ADDR(lp->td_ring));
+		return rc;
 	}
 	timer_setup(&lp->media_check_timer, korina_poll_media, 0);
 
@@ -1127,20 +1122,7 @@ static int korina_probe(struct platform_device *pdev)
 
 	printk(KERN_INFO "%s: " DRV_NAME "-" DRV_VERSION " " DRV_RELDATE "\n",
 			dev->name);
-out:
 	return rc;
-
-probe_err_register:
-	kfree((struct dma_desc *)KSEG0ADDR(lp->td_ring));
-probe_err_td_ring:
-	iounmap(lp->tx_dma_regs);
-probe_err_dma_tx:
-	iounmap(lp->rx_dma_regs);
-probe_err_dma_rx:
-	iounmap(lp->eth_regs);
-probe_err_out:
-	free_netdev(dev);
-	goto out;
 }
 
 static int korina_remove(struct platform_device *pdev)
@@ -1148,13 +1130,9 @@ static int korina_remove(struct platform_device *pdev)
 	struct korina_device *bif = platform_get_drvdata(pdev);
 	struct korina_private *lp = netdev_priv(bif->dev);
 
-	iounmap(lp->eth_regs);
-	iounmap(lp->rx_dma_regs);
-	iounmap(lp->tx_dma_regs);
 	kfree((struct dma_desc *)KSEG0ADDR(lp->td_ring));
 
 	unregister_netdev(bif->dev);
-	free_netdev(bif->dev);
 
 	return 0;
 }
-- 
2.29.2