hwrng: exynos - Fix runtime PM imbalance on error

[ Upstream commit 0cdbabf ]

pm_runtime_resume_and_get() wraps around pm_runtime_get_sync() and
decrements the runtime PM usage counter in case the latter function
fails and keeps the counter balanced.

Signed-off-by: Łukasz Stelmach <l.stelmach@samsung.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>

drivers/char/hw_random/exynos-trng.c

@@ -132,7 +132,7 @@ static int exynos_trng_probe(struct platform_device *pdev)
 		return PTR_ERR(trng->mem);
 
 	pm_runtime_enable(&pdev->dev);
-	ret = pm_runtime_get_sync(&pdev->dev);
+	ret = pm_runtime_resume_and_get(&pdev->dev);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "Could not get runtime PM.\n");
 		goto err_pm_get;
@@ -165,7 +165,7 @@ static int exynos_trng_probe(struct platform_device *pdev)
 	clk_disable_unprepare(trng->clk);
 
 err_clock:
-	pm_runtime_put_sync(&pdev->dev);
+	pm_runtime_put_noidle(&pdev->dev);
 
 err_pm_get:
 	pm_runtime_disable(&pdev->dev);