Subject: [PATCH 3/3] watchdog: imx2_wdt: Use 'dev' instead of dereferencing it repeatedly

From: Anson Huang <[email-masked]>
Date: Tue, 24 Sep 2019 15:07:08 +0800

Add helper variable dev = &pdev->dev to simply the code.

Signed-off-by: Anson Huang <[email-masked]>
---
 drivers/watchdog/imx2_wdt.c | 23 ++++++++++++-----------
 1 file changed, 12 insertions(+), 11 deletions(-)

diff --git a/drivers/watchdog/imx2_wdt.c b/drivers/watchdog/imx2_wdt.c
index 034f32c..f8d58bf 100644
--- a/drivers/watchdog/imx2_wdt.c
+++ b/drivers/watchdog/imx2_wdt.c
@@ -246,13 +246,14 @@ static const struct regmap_config imx2_wdt_regmap_config = {
 
 static int __init imx2_wdt_probe(struct platform_device *pdev)
 {
+	struct device *dev = &pdev->dev;
 	struct imx2_wdt_device *wdev;
 	struct watchdog_device *wdog;
 	void __iomem *base;
 	int ret;
 	u32 val;
 
-	wdev = devm_kzalloc(&pdev->dev, sizeof(*wdev), GFP_KERNEL);
+	wdev = devm_kzalloc(dev, sizeof(*wdev), GFP_KERNEL);
 	if (!wdev)
 		return -ENOMEM;
 
@@ -260,16 +261,16 @@ static int __init imx2_wdt_probe(struct platform_device *pdev)
 	if (IS_ERR(base))
 		return PTR_ERR(base);
 
-	wdev->regmap = devm_regmap_init_mmio_clk(&pdev->dev, NULL, base,
+	wdev->regmap = devm_regmap_init_mmio_clk(dev, NULL, base,
 						 &imx2_wdt_regmap_config);
 	if (IS_ERR(wdev->regmap)) {
-		dev_err(&pdev->dev, "regmap init failed\n");
+		dev_err(dev, "regmap init failed\n");
 		return PTR_ERR(wdev->regmap);
 	}
 
-	wdev->clk = devm_clk_get(&pdev->dev, NULL);
+	wdev->clk = devm_clk_get(dev, NULL);
 	if (IS_ERR(wdev->clk)) {
-		dev_err(&pdev->dev, "can't get Watchdog clock\n");
+		dev_err(dev, "can't get Watchdog clock\n");
 		return PTR_ERR(wdev->clk);
 	}
 
@@ -279,12 +280,12 @@ static int __init imx2_wdt_probe(struct platform_device *pdev)
 	wdog->min_timeout	= 1;
 	wdog->timeout		= IMX2_WDT_DEFAULT_TIME;
 	wdog->max_hw_heartbeat_ms = IMX2_WDT_MAX_TIME * 1000;
-	wdog->parent		= &pdev->dev;
+	wdog->parent		= dev;
 
 	ret = platform_get_irq(pdev, 0);
 	if (ret > 0)
-		if (!devm_request_irq(&pdev->dev, ret, imx2_wdt_isr, 0,
-				      dev_name(&pdev->dev), wdog))
+		if (!devm_request_irq(dev, ret, imx2_wdt_isr, 0,
+				      dev_name(dev), wdog))
 			wdog->info = &imx2_wdt_pretimeout_info;
 
 	ret = clk_prepare_enable(wdev->clk);
@@ -294,13 +295,13 @@ static int __init imx2_wdt_probe(struct platform_device *pdev)
 	regmap_read(wdev->regmap, IMX2_WDT_WRSR, &val);
 	wdog->bootstatus = val & IMX2_WDT_WRSR_TOUT ? WDIOF_CARDRESET : 0;
 
-	wdev->ext_reset = of_property_read_bool(pdev->dev.of_node,
+	wdev->ext_reset = of_property_read_bool(dev->of_node,
 						"fsl,ext-reset-output");
 	platform_set_drvdata(pdev, wdog);
 	watchdog_set_drvdata(wdog, wdev);
 	watchdog_set_nowayout(wdog, nowayout);
 	watchdog_set_restart_priority(wdog, 128);
-	watchdog_init_timeout(wdog, timeout, &pdev->dev);
+	watchdog_init_timeout(wdog, timeout, dev);
 
 	if (imx2_wdt_is_running(wdev)) {
 		imx2_wdt_set_timeout(wdog, wdog->timeout);
@@ -318,7 +319,7 @@ static int __init imx2_wdt_probe(struct platform_device *pdev)
 	if (ret)
 		goto disable_clk;
 
-	dev_info(&pdev->dev, "timeout %d sec (nowayout=%d)\n",
+	dev_info(dev, "timeout %d sec (nowayout=%d)\n",
 		 wdog->timeout, nowayout);
 
 	return 0;
-- 
2.7.4

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