1 files changed, 45 insertions, 30 deletions

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 3ee99d070608..d9074191edef 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -536,6 +536,14 @@ static int linehandle_create(struct gpio_device *gdev, void __user *ip)
 		return -EINVAL;
 
 	/*
+	 * Do not allow both INPUT & OUTPUT flags to be set as they are
+	 * contradictory.
+	 */
+	if ((lflags & GPIOHANDLE_REQUEST_INPUT) &&
+	    (lflags & GPIOHANDLE_REQUEST_OUTPUT))
+		return -EINVAL;
+
+	/*
 	 * Do not allow OPEN_SOURCE & OPEN_DRAIN flags in a single request. If
 	 * the hardware actually supports enabling both at the same time the
 	 * electrical result would be disastrous.
@@ -926,7 +934,9 @@ static int lineevent_create(struct gpio_device *gdev, void __user *ip)
 	}
 
 	/* This is just wrong: we don't look for events on output lines */
-	if (lflags & GPIOHANDLE_REQUEST_OUTPUT) {
+	if ((lflags & GPIOHANDLE_REQUEST_OUTPUT) ||
+	    (lflags & GPIOHANDLE_REQUEST_OPEN_DRAIN) ||
+	    (lflags & GPIOHANDLE_REQUEST_OPEN_SOURCE)) {
 		ret = -EINVAL;
 		goto out_free_label;
 	}
@@ -940,10 +950,6 @@ static int lineevent_create(struct gpio_device *gdev, void __user *ip)
 
 	if (lflags & GPIOHANDLE_REQUEST_ACTIVE_LOW)
 		set_bit(FLAG_ACTIVE_LOW, &desc->flags);
-	if (lflags & GPIOHANDLE_REQUEST_OPEN_DRAIN)
-		set_bit(FLAG_OPEN_DRAIN, &desc->flags);
-	if (lflags & GPIOHANDLE_REQUEST_OPEN_SOURCE)
-		set_bit(FLAG_OPEN_SOURCE, &desc->flags);
 
 	ret = gpiod_direction_input(desc);
 	if (ret)
@@ -956,9 +962,11 @@ static int lineevent_create(struct gpio_device *gdev, void __user *ip)
 	}
 
 	if (eflags & GPIOEVENT_REQUEST_RISING_EDGE)
-		irqflags |= IRQF_TRIGGER_RISING;
+		irqflags |= test_bit(FLAG_ACTIVE_LOW, &desc->flags) ?
+			IRQF_TRIGGER_FALLING : IRQF_TRIGGER_RISING;
 	if (eflags & GPIOEVENT_REQUEST_FALLING_EDGE)
-		irqflags |= IRQF_TRIGGER_FALLING;
+		irqflags |= test_bit(FLAG_ACTIVE_LOW, &desc->flags) ?
+			IRQF_TRIGGER_RISING : IRQF_TRIGGER_FALLING;
 	irqflags |= IRQF_ONESHOT;
 
 	INIT_KFIFO(le->events);
@@ -1089,9 +1097,11 @@ static long gpio_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 		if (test_bit(FLAG_ACTIVE_LOW, &desc->flags))
 			lineinfo.flags |= GPIOLINE_FLAG_ACTIVE_LOW;
 		if (test_bit(FLAG_OPEN_DRAIN, &desc->flags))
-			lineinfo.flags |= GPIOLINE_FLAG_OPEN_DRAIN;
+			lineinfo.flags |= (GPIOLINE_FLAG_OPEN_DRAIN |
+					   GPIOLINE_FLAG_IS_OUT);
 		if (test_bit(FLAG_OPEN_SOURCE, &desc->flags))
-			lineinfo.flags |= GPIOLINE_FLAG_OPEN_SOURCE;
+			lineinfo.flags |= (GPIOLINE_FLAG_OPEN_SOURCE |
+					   GPIOLINE_FLAG_IS_OUT);
 
 		if (copy_to_user(ip, &lineinfo, sizeof(lineinfo)))
 			return -EFAULT;
@@ -1369,21 +1379,13 @@ int gpiochip_add_data_with_key(struct gpio_chip *chip, void *data,
 	if (status)
 		goto err_remove_from_list;
 
-	status = gpiochip_irqchip_init_valid_mask(chip);
-	if (status)
-		goto err_remove_from_list;
-
 	status = gpiochip_alloc_valid_mask(chip);
 	if (status)
-		goto err_remove_irqchip_mask;
-
-	status = gpiochip_add_irqchip(chip, lock_key, request_key);
-	if (status)
-		goto err_free_gpiochip_mask;
+		goto err_remove_from_list;
 
 	status = of_gpiochip_add(chip);
 	if (status)
-		goto err_remove_chip;
+		goto err_free_gpiochip_mask;
 
 	status = gpiochip_init_valid_mask(chip);
 	if (status)
@@ -1392,18 +1394,31 @@ int gpiochip_add_data_with_key(struct gpio_chip *chip, void *data,
 	for (i = 0; i < chip->ngpio; i++) {
 		struct gpio_desc *desc = &gdev->descs[i];
 
-		if (chip->get_direction && gpiochip_line_is_valid(chip, i))
-			desc->flags = !chip->get_direction(chip, i) ?
-					(1 << FLAG_IS_OUT) : 0;
-		else
-			desc->flags = !chip->direction_input ?
-					(1 << FLAG_IS_OUT) : 0;
+		if (chip->get_direction && gpiochip_line_is_valid(chip, i)) {
+			if (!chip->get_direction(chip, i))
+				set_bit(FLAG_IS_OUT, &desc->flags);
+			else
+				clear_bit(FLAG_IS_OUT, &desc->flags);
+		} else {
+			if (!chip->direction_input)
+				set_bit(FLAG_IS_OUT, &desc->flags);
+			else
+				clear_bit(FLAG_IS_OUT, &desc->flags);
+		}
 	}
 
 	acpi_gpiochip_add(chip);
 
 	machine_gpiochip_add(chip);
 
+	status = gpiochip_irqchip_init_valid_mask(chip);
+	if (status)
+		goto err_remove_acpi_chip;
+
+	status = gpiochip_add_irqchip(chip, lock_key, request_key);
+	if (status)
+		goto err_remove_irqchip_mask;
+
 	/*
 	 * By first adding the chardev, and then adding the device,
 	 * we get a device node entry in sysfs under
@@ -1415,21 +1430,21 @@ int gpiochip_add_data_with_key(struct gpio_chip *chip, void *data,
 	if (gpiolib_initialized) {
 		status = gpiochip_setup_dev(gdev);
 		if (status)
-			goto err_remove_acpi_chip;
+			goto err_remove_irqchip;
 	}
 	return 0;
 
+err_remove_irqchip:
+	gpiochip_irqchip_remove(chip);
+err_remove_irqchip_mask:
+	gpiochip_irqchip_free_valid_mask(chip);
 err_remove_acpi_chip:
 	acpi_gpiochip_remove(chip);
 err_remove_of_chip:
 	gpiochip_free_hogs(chip);
 	of_gpiochip_remove(chip);
-err_remove_chip:
-	gpiochip_irqchip_remove(chip);
 err_free_gpiochip_mask:
 	gpiochip_free_valid_mask(chip);
-err_remove_irqchip_mask:
-	gpiochip_irqchip_free_valid_mask(chip);
 err_remove_from_list:
 	spin_lock_irqsave(&gpio_lock, flags);
 	list_del(&gdev->list);