GPIO fixes for v5.3-rc1

- silence error messages on probe deferral in gpio-davinci
 - fix a memory leak in gpiolib-of
 - fix a potential use-after-free error in gpio-em
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Merge tag 'gpio-v5.3-rc1-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux into fixes

GPIO fixes for v5.3-rc1

- silence error messages on probe deferral in gpio-davinci
- fix a memory leak in gpiolib-of
- fix a potential use-after-free error in gpio-em

drivers/gpio/gpio-davinci.c

@@ -238,8 +238,9 @@ static int davinci_gpio_probe(struct platform_device *pdev)
 	for (i = 0; i < nirq; i++) {
 		chips->irqs[i] = platform_get_irq(pdev, i);
 		if (chips->irqs[i] < 0) {
-			dev_info(dev, "IRQ not populated, err = %d\n",
-				 chips->irqs[i]);
+			if (chips->irqs[i] != -EPROBE_DEFER)
+				dev_info(dev, "IRQ not populated, err = %d\n",
+					 chips->irqs[i]);
 			return chips->irqs[i];
 		}
 	}

drivers/gpio/gpio-em.c

@@ -259,6 +259,13 @@ static const struct irq_domain_ops em_gio_irq_domain_ops = {
 	.xlate	= irq_domain_xlate_twocell,
 };
 
+static void em_gio_irq_domain_remove(void *data)
+{
+	struct irq_domain *domain = data;
+
+	irq_domain_remove(domain);
+}
+
 static int em_gio_probe(struct platform_device *pdev)
 {
 	struct em_gio_priv *p;
@@ -333,39 +340,30 @@ static int em_gio_probe(struct platform_device *pdev)
 		return -ENXIO;
 	}
 
+	ret = devm_add_action_or_reset(&pdev->dev, em_gio_irq_domain_remove,
+				       p->irq_domain);
+	if (ret)
+		return ret;
+
 	if (devm_request_irq(&pdev->dev, irq[0]->start,
 			     em_gio_irq_handler, 0, name, p)) {
 		dev_err(&pdev->dev, "failed to request low IRQ\n");
-		ret = -ENOENT;
-		goto err1;
+		return -ENOENT;
 	}
 
 	if (devm_request_irq(&pdev->dev, irq[1]->start,
 			     em_gio_irq_handler, 0, name, p)) {
 		dev_err(&pdev->dev, "failed to request high IRQ\n");
-		ret = -ENOENT;
-		goto err1;
+		return -ENOENT;
 	}
 
 	ret = devm_gpiochip_add_data(&pdev->dev, gpio_chip, p);
 	if (ret) {
 		dev_err(&pdev->dev, "failed to add GPIO controller\n");
-		goto err1;
+		return ret;
 	}
 
 	return 0;
-
-err1:
-	irq_domain_remove(p->irq_domain);
-	return ret;
-}
-
-static int em_gio_remove(struct platform_device *pdev)
-{
-	struct em_gio_priv *p = platform_get_drvdata(pdev);
-
-	irq_domain_remove(p->irq_domain);
-	return 0;
 }
 
 static const struct of_device_id em_gio_dt_ids[] = {
@@ -376,7 +374,6 @@ MODULE_DEVICE_TABLE(of, em_gio_dt_ids);
 
 static struct platform_driver em_gio_device_driver = {
 	.probe		= em_gio_probe,
-	.remove		= em_gio_remove,
 	.driver		= {
 		.name	= "em_gio",
 		.of_match_table = em_gio_dt_ids,

drivers/gpio/gpiolib-of.c

@@ -154,6 +154,7 @@ static void of_gpio_flags_quirks(struct device_node *np,
 							of_node_full_name(child));
 					*flags |= OF_GPIO_ACTIVE_LOW;
 				}
+				of_node_put(child);
 				break;
 			}
 		}