gpio: acpi: Ignore -EPROBE_DEFER for unselected gpioints
When acpi_dev_gpio_irq_get gets called with an index of say 2, it should
not care if acpi_get_gpiod for index 0 or 1 returns -EPROBE_DEFER.
This allows drivers which request a gpioint with index > 0 to function
if there is no gpiochip driver (loaded) for gpioints with a lower index.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@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 a5b84d4..56a6b1b 100644
--- a/drivers/gpio/gpiolib-acpi.c
+++ b/drivers/gpio/gpiolib-acpi.c
@@ -684,20 +684,24 @@ int acpi_dev_gpio_irq_get(struct acpi_device *adev, int index)
{
int idx, i;
unsigned int irq_flags;
- int ret = -ENOENT;
for (i = 0, idx = 0; idx <= index; i++) {
struct acpi_gpio_info info;
struct gpio_desc *desc;
desc = acpi_get_gpiod_by_index(adev, NULL, i, &info);
- if (IS_ERR(desc)) {
- ret = PTR_ERR(desc);
- break;
- }
- if (info.gpioint && idx++ == index) {
- int irq = gpiod_to_irq(desc);
+ /* Ignore -EPROBE_DEFER, it only matters if idx matches */
+ if (IS_ERR(desc) && PTR_ERR(desc) != -EPROBE_DEFER)
+ return PTR_ERR(desc);
+
+ if (info.gpioint && idx++ == index) {
+ int irq;
+
+ if (IS_ERR(desc))
+ return PTR_ERR(desc);
+
+ irq = gpiod_to_irq(desc);
if (irq < 0)
return irq;
@@ -713,7 +717,7 @@ int acpi_dev_gpio_irq_get(struct acpi_device *adev, int index)
}
}
- return ret;
+ return -ENOENT;
}
EXPORT_SYMBOL_GPL(acpi_dev_gpio_irq_get);