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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>
This commit is contained in:
Hans de Goede 2017-03-13 23:04:21 +01:00 committed by Linus Walleij
parent c5097538c8
commit 6798d7271c
1 changed files with 12 additions and 8 deletions
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20
drivers/gpio/gpiolib-acpi.c
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@ -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);