1 files changed, 46 insertions, 33 deletions

diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c
index 4a987917c186..05c6275da224 100644
--- a/drivers/gpio/gpiolib-acpi.c
+++ b/drivers/gpio/gpiolib-acpi.c
@@ -25,10 +25,12 @@ struct acpi_gpio_event {
 	acpi_handle handle;
 	unsigned int pin;
 	unsigned int irq;
+	struct gpio_desc *desc;
 };
 
 struct acpi_gpio_connection {
 	struct list_head node;
+	unsigned int pin;
 	struct gpio_desc *desc;
 };
 
@@ -143,21 +145,15 @@ static acpi_status acpi_gpiochip_request_interrupt(struct acpi_resource *ares,
 	if (!handler)
 		return AE_BAD_PARAMETER;
 
-	desc = gpiochip_get_desc(chip, pin);
+	desc = gpiochip_request_own_desc(chip, pin, "ACPI:Event");
 	if (IS_ERR(desc)) {
-		dev_err(chip->dev, "Failed to get GPIO descriptor\n");
-		return AE_ERROR;
-	}
-
-	ret = gpiochip_request_own_desc(desc, "ACPI:Event");
-	if (ret) {
 		dev_err(chip->dev, "Failed to request GPIO\n");
 		return AE_ERROR;
 	}
 
 	gpiod_direction_input(desc);
 
-	ret = gpiod_lock_as_irq(desc);
+	ret = gpio_lock_as_irq(chip, pin);
 	if (ret) {
 		dev_err(chip->dev, "Failed to lock GPIO as interrupt\n");
 		goto fail_free_desc;
@@ -197,6 +193,7 @@ static acpi_status acpi_gpiochip_request_interrupt(struct acpi_resource *ares,
 	event->handle = evt_handle;
 	event->irq = irq;
 	event->pin = pin;
+	event->desc = desc;
 
 	ret = request_threaded_irq(event->irq, NULL, handler, irqflags,
 				   "ACPI:Event", event);
@@ -212,7 +209,7 @@ static acpi_status acpi_gpiochip_request_interrupt(struct acpi_resource *ares,
 fail_free_event:
 	kfree(event);
 fail_unlock_irq:
-	gpiod_unlock_as_irq(desc);
+	gpio_unlock_as_irq(chip, pin);
 fail_free_desc:
 	gpiochip_free_own_desc(desc);
 
@@ -221,7 +218,7 @@ fail_free_desc:
 
 /**
  * acpi_gpiochip_request_interrupts() - Register isr for gpio chip ACPI events
- * @acpi_gpio:      ACPI GPIO chip
+ * @chip:      GPIO chip
  *
  * ACPI5 platforms can use GPIO signaled ACPI events. These GPIO interrupts are
  * handled by ACPI event methods which need to be called from the GPIO
@@ -229,11 +226,21 @@ fail_free_desc:
  * gpio pins have acpi event methods and assigns interrupt handlers that calls
  * the acpi event methods for those pins.
  */
-static void acpi_gpiochip_request_interrupts(struct acpi_gpio_chip *acpi_gpio)
+void acpi_gpiochip_request_interrupts(struct gpio_chip *chip)
 {
-	struct gpio_chip *chip = acpi_gpio->chip;
+	struct acpi_gpio_chip *acpi_gpio;
+	acpi_handle handle;
+	acpi_status status;
+
+	if (!chip->dev || !chip->to_irq)
+		return;
 
-	if (!chip->to_irq)
+	handle = ACPI_HANDLE(chip->dev);
+	if (!handle)
+		return;
+
+	status = acpi_get_data(handle, acpi_gpio_chip_dh, (void **)&acpi_gpio);
+	if (ACPI_FAILURE(status))
 		return;
 
 	INIT_LIST_HEAD(&acpi_gpio->events);
@@ -243,27 +250,37 @@ static void acpi_gpiochip_request_interrupts(struct acpi_gpio_chip *acpi_gpio)
 
 /**
  * acpi_gpiochip_free_interrupts() - Free GPIO ACPI event interrupts.
- * @acpi_gpio:      ACPI GPIO chip
+ * @chip:      GPIO chip
  *
  * Free interrupts associated with GPIO ACPI event method for the given
  * GPIO chip.
  */
-static void acpi_gpiochip_free_interrupts(struct acpi_gpio_chip *acpi_gpio)
+void acpi_gpiochip_free_interrupts(struct gpio_chip *chip)
 {
+	struct acpi_gpio_chip *acpi_gpio;
 	struct acpi_gpio_event *event, *ep;
-	struct gpio_chip *chip = acpi_gpio->chip;
+	acpi_handle handle;
+	acpi_status status;
+
+	if (!chip->dev || !chip->to_irq)
+		return;
+
+	handle = ACPI_HANDLE(chip->dev);
+	if (!handle)
+		return;
 
-	if (!chip->to_irq)
+	status = acpi_get_data(handle, acpi_gpio_chip_dh, (void **)&acpi_gpio);
+	if (ACPI_FAILURE(status))
 		return;
 
 	list_for_each_entry_safe_reverse(event, ep, &acpi_gpio->events, node) {
 		struct gpio_desc *desc;
 
 		free_irq(event->irq, event);
-		desc = gpiochip_get_desc(chip, event->pin);
+		desc = event->desc;
 		if (WARN_ON(IS_ERR(desc)))
 			continue;
-		gpiod_unlock_as_irq(desc);
+		gpio_unlock_as_irq(chip, event->pin);
 		gpiochip_free_own_desc(desc);
 		list_del(&event->node);
 		kfree(event);
@@ -357,8 +374,10 @@ acpi_gpio_adr_space_handler(u32 function, acpi_physical_address address,
 	struct gpio_chip *chip = achip->chip;
 	struct acpi_resource_gpio *agpio;
 	struct acpi_resource *ares;
+	int pin_index = (int)address;
 	acpi_status status;
 	bool pull_up;
+	int length;
 	int i;
 
 	status = acpi_buffer_to_resource(achip->conn_info.connection,
@@ -380,32 +399,27 @@ acpi_gpio_adr_space_handler(u32 function, acpi_physical_address address,
 		return AE_BAD_PARAMETER;
 	}
 
-	for (i = 0; i < agpio->pin_table_length; i++) {
+	length = min(agpio->pin_table_length, (u16)(pin_index + bits));
+	for (i = pin_index; i < length; ++i) {
 		unsigned pin = agpio->pin_table[i];
 		struct acpi_gpio_connection *conn;
 		struct gpio_desc *desc;
 		bool found;
 
-		desc = gpiochip_get_desc(chip, pin);
-		if (IS_ERR(desc)) {
-			status = AE_ERROR;
-			goto out;
-		}
-
 		mutex_lock(&achip->conn_lock);
 
 		found = false;
 		list_for_each_entry(conn, &achip->conns, node) {
-			if (conn->desc == desc) {
+			if (conn->pin == pin) {
 				found = true;
+				desc = conn->desc;
 				break;
 			}
 		}
 		if (!found) {
-			int ret;
-
-			ret = gpiochip_request_own_desc(desc, "ACPI:OpRegion");
-			if (ret) {
+			desc = gpiochip_request_own_desc(chip, pin,
+							 "ACPI:OpRegion");
+			if (IS_ERR(desc)) {
 				status = AE_ERROR;
 				mutex_unlock(&achip->conn_lock);
 				goto out;
@@ -442,6 +456,7 @@ acpi_gpio_adr_space_handler(u32 function, acpi_physical_address address,
 				goto out;
 			}
 
+			conn->pin = pin;
 			conn->desc = desc;
 			list_add_tail(&conn->node, &achip->conns);
 		}
@@ -525,7 +540,6 @@ void acpi_gpiochip_add(struct gpio_chip *chip)
 		return;
 	}
 
-	acpi_gpiochip_request_interrupts(acpi_gpio);
 	acpi_gpiochip_request_regions(acpi_gpio);
 }
 
@@ -549,7 +563,6 @@ void acpi_gpiochip_remove(struct gpio_chip *chip)
 	}
 
 	acpi_gpiochip_free_regions(acpi_gpio);
-	acpi_gpiochip_free_interrupts(acpi_gpio);
 
 	acpi_detach_data(handle, acpi_gpio_chip_dh);
 	kfree(acpi_gpio);