[PATCH v3 1/5] spi: spi-nxp-fspi: remove the goto in probe

[Haibo Chen <haibo.chen@nxp.com>]

Remove all the goto in probe to simplify the driver.

Signed-off-by: Haibo Chen <haibo.chen@nxp.com>
---
 drivers/spi/spi-nxp-fspi.c | 87 ++++++++++++++--------------------------------
 1 file changed, 27 insertions(+), 60 deletions(-)

diff --git a/drivers/spi/spi-nxp-fspi.c b/drivers/spi/spi-nxp-fspi.c
index bad6b30bab0ecb90d0aaf603b6de5bc834d19de6..00da184be88a026bf562c9808e18e2335a0959e9 100644
--- a/drivers/spi/spi-nxp-fspi.c
+++ b/drivers/spi/spi-nxp-fspi.c
@@ -1161,10 +1161,10 @@ static int nxp_fspi_probe(struct platform_device *pdev)
 	struct device_node *np = dev->of_node;
 	struct resource *res;
 	struct nxp_fspi *f;
-	int ret;
+	int ret, irq;
 	u32 reg;
 
-	ctlr = spi_alloc_host(&pdev->dev, sizeof(*f));
+	ctlr = devm_spi_alloc_host(&pdev->dev, sizeof(*f));
 	if (!ctlr)
 		return -ENOMEM;
 
@@ -1174,10 +1174,8 @@ static int nxp_fspi_probe(struct platform_device *pdev)
 	f = spi_controller_get_devdata(ctlr);
 	f->dev = dev;
 	f->devtype_data = (struct nxp_fspi_devtype_data *)device_get_match_data(dev);
-	if (!f->devtype_data) {
-		ret = -ENODEV;
-		goto err_put_ctrl;
-	}
+	if (!f->devtype_data)
+		return -ENODEV;
 
 	platform_set_drvdata(pdev, f);
 
@@ -1186,11 +1184,8 @@ static int nxp_fspi_probe(struct platform_device *pdev)
 		f->iobase = devm_platform_ioremap_resource(pdev, 0);
 	else
 		f->iobase = devm_platform_ioremap_resource_byname(pdev, "fspi_base");
-
-	if (IS_ERR(f->iobase)) {
-		ret = PTR_ERR(f->iobase);
-		goto err_put_ctrl;
-	}
+	if (IS_ERR(f->iobase))
+		return PTR_ERR(f->iobase);
 
 	/* find the resources - controller memory mapped space */
 	if (is_acpi_node(dev_fwnode(f->dev)))
@@ -1198,11 +1193,8 @@ static int nxp_fspi_probe(struct platform_device *pdev)
 	else
 		res = platform_get_resource_byname(pdev,
 				IORESOURCE_MEM, "fspi_mmap");
-
-	if (!res) {
-		ret = -ENODEV;
-		goto err_put_ctrl;
-	}
+	if (!res)
+		return -ENODEV;
 
 	/* assign memory mapped starting address and mapped size. */
 	f->memmap_phy = res->start;
@@ -1211,69 +1203,46 @@ static int nxp_fspi_probe(struct platform_device *pdev)
 	/* find the clocks */
 	if (dev_of_node(&pdev->dev)) {
 		f->clk_en = devm_clk_get(dev, "fspi_en");
-		if (IS_ERR(f->clk_en)) {
-			ret = PTR_ERR(f->clk_en);
-			goto err_put_ctrl;
-		}
+		if (IS_ERR(f->clk_en))
+			return PTR_ERR(f->clk_en);
 
 		f->clk = devm_clk_get(dev, "fspi");
-		if (IS_ERR(f->clk)) {
-			ret = PTR_ERR(f->clk);
-			goto err_put_ctrl;
-		}
-
-		ret = nxp_fspi_clk_prep_enable(f);
-		if (ret) {
-			dev_err(dev, "can not enable the clock\n");
-			goto err_put_ctrl;
-		}
+		if (IS_ERR(f->clk))
+			return PTR_ERR(f->clk);
 	}
 
+	/* find the irq */
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0)
+		return dev_err_probe(dev, irq, "Failed to get irq source");
+
+	ret = nxp_fspi_clk_prep_enable(f);
+	if (ret)
+		return dev_err_probe(dev, ret, "Can't enable the clock\n");
+
 	/* Clear potential interrupts */
 	reg = fspi_readl(f, f->iobase + FSPI_INTR);
 	if (reg)
 		fspi_writel(f, reg, f->iobase + FSPI_INTR);
 
-	/* find the irq */
-	ret = platform_get_irq(pdev, 0);
-	if (ret < 0)
-		goto err_disable_clk;
+	nxp_fspi_default_setup(f);
 
-	ret = devm_request_irq(dev, ret,
+	ret = devm_request_irq(dev, irq,
 			nxp_fspi_irq_handler, 0, pdev->name, f);
 	if (ret) {
-		dev_err(dev, "failed to request irq: %d\n", ret);
-		goto err_disable_clk;
+		nxp_fspi_clk_disable_unprep(f);
+		return dev_err_probe(dev, ret, "Failed to request irq\n");
 	}
 
-	mutex_init(&f->lock);
+	devm_mutex_init(dev, &f->lock);
 
 	ctlr->bus_num = -1;
 	ctlr->num_chipselect = NXP_FSPI_MAX_CHIPSELECT;
 	ctlr->mem_ops = &nxp_fspi_mem_ops;
 	ctlr->mem_caps = &nxp_fspi_mem_caps;
-
-	nxp_fspi_default_setup(f);
-
 	ctlr->dev.of_node = np;
 
-	ret = devm_spi_register_controller(&pdev->dev, ctlr);
-	if (ret)
-		goto err_destroy_mutex;
-
-	return 0;
-
-err_destroy_mutex:
-	mutex_destroy(&f->lock);
-
-err_disable_clk:
-	nxp_fspi_clk_disable_unprep(f);
-
-err_put_ctrl:
-	spi_controller_put(ctlr);
-
-	dev_err(dev, "NXP FSPI probe failed\n");
-	return ret;
+	return devm_spi_register_controller(&pdev->dev, ctlr);
 }
 
 static void nxp_fspi_remove(struct platform_device *pdev)
@@ -1285,8 +1254,6 @@ static void nxp_fspi_remove(struct platform_device *pdev)
 
 	nxp_fspi_clk_disable_unprep(f);
 
-	mutex_destroy(&f->lock);
-
 	if (f->ahb_addr)
 		iounmap(f->ahb_addr);
 }

-- 
2.34.1