修改内核路径

hc

2024-05-14 bedbef8ad3e75a304af6361af235302bcc61d06b

 kernel/drivers/watchdog/ts4800_wdt.c
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@@ -108,7 +108,8 @@
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 static int ts4800_wdt_probe(struct platform_device *pdev)
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 {
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-	struct device_node *np = pdev->dev.of_node;
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+	struct device *dev = &pdev->dev;
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+	struct device_node *np = dev->of_node;
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 	struct device_node *syscon_np;
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 	struct watchdog_device *wdd;
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 	struct ts4800_wdt *wdt;
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@@ -117,32 +118,36 @@
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 	syscon_np = of_parse_phandle(np, "syscon", 0);
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 	if (!syscon_np) {
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-		dev_err(&pdev->dev, "no syscon property\n");
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+		dev_err(dev, "no syscon property\n");
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 		return -ENODEV;
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 	}
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 	ret = of_property_read_u32_index(np, "syscon", 1, &reg);
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 	if (ret < 0) {
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-		dev_err(&pdev->dev, "no offset in syscon\n");
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+		dev_err(dev, "no offset in syscon\n");
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+		of_node_put(syscon_np);
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 		return ret;
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 	}
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 	/* allocate memory for watchdog struct */
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-	wdt = devm_kzalloc(&pdev->dev, sizeof(*wdt), GFP_KERNEL);
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-	if (!wdt)
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+	wdt = devm_kzalloc(dev, sizeof(*wdt), GFP_KERNEL);
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+	if (!wdt) {
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+		of_node_put(syscon_np);
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 		return -ENOMEM;
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+	}
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 	/* set regmap and offset to know where to write */
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 	wdt->feed_offset = reg;
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 	wdt->regmap = syscon_node_to_regmap(syscon_np);
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+	of_node_put(syscon_np);
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 	if (IS_ERR(wdt->regmap)) {
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-		dev_err(&pdev->dev, "cannot get parent's regmap\n");
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+		dev_err(dev, "cannot get parent's regmap\n");
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 		return PTR_ERR(wdt->regmap);
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 	}
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 	/* Initialize struct watchdog_device */
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 	wdd = &wdt->wdd;
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-	wdd->parent = &pdev->dev;
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+	wdd->parent = dev;
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 	wdd->info = &ts4800_wdt_info;
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 	wdd->ops = &ts4800_wdt_ops;
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 	wdd->min_timeout = ts4800_wdt_map[0].timeout;
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@@ -150,7 +155,7 @@
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 	watchdog_set_drvdata(wdd, wdt);
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 	watchdog_set_nowayout(wdd, nowayout);
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-	watchdog_init_timeout(wdd, 0, &pdev->dev);
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+	watchdog_init_timeout(wdd, 0, dev);
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 	/*
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 	 * As this watchdog supports only a few values, ts4800_wdt_set_timeout
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@@ -168,27 +173,14 @@
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 	 */
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 	ts4800_wdt_stop(wdd);
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-	ret = watchdog_register_device(wdd);
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-	if (ret) {
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-		dev_err(&pdev->dev,
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-			"failed to register watchdog device\n");
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+	ret = devm_watchdog_register_device(dev, wdd);
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+	if (ret)
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 		return ret;
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-	}
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 	platform_set_drvdata(pdev, wdt);
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-	dev_info(&pdev->dev,
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-		 "initialized (timeout = %d sec, nowayout = %d)\n",
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+	dev_info(dev, "initialized (timeout = %d sec, nowayout = %d)\n",
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 		 wdd->timeout, nowayout);
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-
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-	return 0;
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-}
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-
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-static int ts4800_wdt_remove(struct platform_device *pdev)
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-{
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-	struct ts4800_wdt *wdt = platform_get_drvdata(pdev);
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-
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-	watchdog_unregister_device(&wdt->wdd);
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 	return 0;
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 }
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@@ -201,7 +193,6 @@
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 static struct platform_driver ts4800_wdt_driver = {
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 	.probe		= ts4800_wdt_probe,
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-	.remove		= ts4800_wdt_remove,
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 	.driver		= {
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 		.name	= "ts4800_wdt",
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 		.of_match_table = ts4800_wdt_of_match,