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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c

 kernel/drivers/char/hw_random/exynos-trng.c
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@@ -109,7 +109,6 @@
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 static int exynos_trng_probe(struct platform_device *pdev)
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 {
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 	struct exynos_trng_dev *trng;
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-	struct resource *res;
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 	int ret = -ENOMEM;
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 	trng = devm_kzalloc(&pdev->dev, sizeof(*trng), GFP_KERNEL);
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@@ -128,13 +127,12 @@
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 	platform_set_drvdata(pdev, trng);
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 	trng->dev = &pdev->dev;
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-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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-	trng->mem = devm_ioremap_resource(&pdev->dev, res);
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+	trng->mem = devm_platform_ioremap_resource(pdev, 0);
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 	if (IS_ERR(trng->mem))
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 		return PTR_ERR(trng->mem);
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 	pm_runtime_enable(&pdev->dev);
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-	ret = pm_runtime_get_sync(&pdev->dev);
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+	ret = pm_runtime_resume_and_get(&pdev->dev);
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 	if (ret < 0) {
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 		dev_err(&pdev->dev, "Could not get runtime PM.\n");
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 		goto err_pm_get;
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@@ -153,7 +151,7 @@
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 		goto err_clock;
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 	}
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-	ret = hwrng_register(&trng->rng);
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+	ret = devm_hwrng_register(&pdev->dev, &trng->rng);
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 	if (ret) {
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 		dev_err(&pdev->dev, "Could not register hwrng device.\n");
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 		goto err_register;
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@@ -167,7 +165,7 @@
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 	clk_disable_unprepare(trng->clk);
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 err_clock:
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-	pm_runtime_put_sync(&pdev->dev);
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+	pm_runtime_put_noidle(&pdev->dev);
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 err_pm_get:
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 	pm_runtime_disable(&pdev->dev);
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@@ -179,7 +177,6 @@
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 {
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 	struct exynos_trng_dev *trng =  platform_get_drvdata(pdev);
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-	hwrng_unregister(&trng->rng);
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 	clk_disable_unprepare(trng->clk);
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 	pm_runtime_put_sync(&pdev->dev);