gpiolib-acpi: Fix error checks in interrupt requesting

Print error message if requesting an interrupt fails.
Use int instead of unsigned for interrupts in case of error values

Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c
index 54ce226..a063eb0 100644 (file)
--- a/drivers/gpio/gpiolib-acpi.c
+++ b/drivers/gpio/gpiolib-acpi.c
@@ -83,7 +83,8 @@ void acpi_gpiochip_request_interrupts(struct gpio_chip *chip)
        struct acpi_resource *res;
        acpi_handle handle, ev_handle;
        acpi_status status;
-       unsigned int pin, irq;
+       unsigned int pin;
+       int irq, ret;
        char ev_name[5];
 
        if (!chip->dev || !chip->to_irq)
@@ -126,11 +127,15 @@ void acpi_gpiochip_request_interrupts(struct gpio_chip *chip)
                        continue;
 
                /* Assume BIOS sets the triggering, so no flags */
-               devm_request_threaded_irq(chip->dev, irq, NULL,
+               ret = devm_request_threaded_irq(chip->dev, irq, NULL,
                                          acpi_gpio_irq_handler,
                                          0,
                                          "GPIO-signaled-ACPI-event",
                                          ev_handle);
+               if (ret)
+                       dev_err(chip->dev,
+                               "Failed to request IRQ %d ACPI event handler\n",
+                               irq);
        }
 }
 EXPORT_SYMBOL(acpi_gpiochip_request_interrupts);