reset: renesas: Fix Runtime PM usage

If pm_runtime_resume_and_get() fails then it returns w/o the RPM usage
counter being incremented. In this case call pm_runtime_put() in
remove() will result in a usage counter imbalance. Therefore check the
return code of pm_runtime_resume_and_get() and bail out in case of error.

Fixes: bee0855 ("reset: renesas: Add RZ/G2L usbphy control driver")
Signed-off-by: Heiner Kallweit <[email protected]>
Reviewed-by: Biju Das <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Philipp Zabel <[email protected]>

Author: hkallweit

drivers/reset/reset-rzg2l-usbphy-ctrl.c

@@ -137,7 +137,12 @@ static int rzg2l_usbphy_ctrl_probe(struct platform_device *pdev)
 	dev_set_drvdata(dev, priv);
 
 	pm_runtime_enable(&pdev->dev);
-	pm_runtime_resume_and_get(&pdev->dev);
+	error = pm_runtime_resume_and_get(&pdev->dev);
+	if (error < 0) {
+		pm_runtime_disable(&pdev->dev);
+		reset_control_assert(priv->rstc);
+		return dev_err_probe(&pdev->dev, error, "pm_runtime_resume_and_get failed");
+	}
 
 	/* put pll and phy into reset state */
 	spin_lock_irqsave(&priv->lock, flags);