--- zzzz-none-000/linux-3.10.107/drivers/gpio/gpio-vr41xx.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/drivers/gpio/gpio-vr41xx.c	2021-02-04 17:41:59.000000000 +0000
@@ -81,6 +81,7 @@
 static unsigned long giu_flags;
 
 static void __iomem *giu_base;
+static struct gpio_chip vr41xx_gpio_chip;
 
 #define giu_read(offset)		readw(giu_base + (offset))
 #define giu_write(offset, value)	writew((value), giu_base + (offset))
@@ -135,12 +136,31 @@
 	giu_set(GIUINTENL, 1 << GPIO_PIN_OF_IRQ(d->irq));
 }
 
+static unsigned int startup_giuint(struct irq_data *data)
+{
+	if (gpiochip_lock_as_irq(&vr41xx_gpio_chip, data->hwirq))
+		dev_err(vr41xx_gpio_chip.dev,
+			"unable to lock HW IRQ %lu for IRQ\n",
+			data->hwirq);
+	/* Satisfy the .enable semantics by unmasking the line */
+	unmask_giuint_low(data);
+	return 0;
+}
+
+static void shutdown_giuint(struct irq_data *data)
+{
+	mask_giuint_low(data);
+	gpiochip_unlock_as_irq(&vr41xx_gpio_chip, data->hwirq);
+}
+
 static struct irq_chip giuint_low_irq_chip = {
 	.name		= "GIUINTL",
 	.irq_ack	= ack_giuint_low,
 	.irq_mask	= mask_giuint_low,
 	.irq_mask_ack	= mask_ack_giuint_low,
 	.irq_unmask	= unmask_giuint_low,
+	.irq_startup	= startup_giuint,
+	.irq_shutdown	= shutdown_giuint,
 };
 
 static void ack_giuint_high(struct irq_data *d)
@@ -495,7 +515,7 @@
 	struct resource *res;
 	unsigned int trigger, i, pin;
 	struct irq_chip *chip;
-	int irq, retval;
+	int irq, ret;
 
 	switch (pdev->id) {
 	case GPIO_50PINS_PULLUPDOWN:
@@ -524,7 +544,11 @@
 
 	vr41xx_gpio_chip.dev = &pdev->dev;
 
-	retval = gpiochip_add(&vr41xx_gpio_chip);
+	ret = gpiochip_add(&vr41xx_gpio_chip);
+	if (!ret) {
+		iounmap(giu_base);
+		return -ENODEV;
+	}
 
 	giu_write(GIUINTENL, 0);
 	giu_write(GIUINTENH, 0);
@@ -567,7 +591,6 @@
 	.remove		= giu_remove,
 	.driver		= {
 		.name	= "GIU",
-		.owner	= THIS_MODULE,
 	},
 };