gpio: mlxbf3: use platform_get_irq_optional()

The gpio-mlxbf3 driver interfaces with two GPIO controllers,
device instance 0 and 1. There is a single IRQ resource shared
between the two controllers, and it is found in the ACPI table for
device instance 0. The driver should not use platform_get_irq(),
otherwise this error is logged when probing instance 1:
    mlxbf3_gpio MLNXBF33:01: error -ENXIO: IRQ index 0 not found

Cc: stable@vger.kernel.org
Fixes: cd33f216d241 ("gpio: mlxbf3: Add gpio driver support")
Signed-off-by: David Thompson <davthompson@nvidia.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/ce70b98a201ce82b9df9aa80ac7a5eeaa2268e52.1754928650.git.davthompson@nvidia.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

diff --git a/drivers/gpio/gpio-mlxbf3.c b/drivers/gpio/gpio-mlxbf3.c
index 10ea71273c891521ac4e4f210d3441faa77e3309..ed29b07d16c19030675994b51a0613b022af131b 100644 (file)
--- a/drivers/gpio/gpio-mlxbf3.c
+++ b/drivers/gpio/gpio-mlxbf3.c
@@ -227,7 +227,7 @@ static int mlxbf3_gpio_probe(struct platform_device *pdev)
        gc->owner = THIS_MODULE;
        gc->add_pin_ranges = mlxbf3_gpio_add_pin_ranges;
 
-       irq = platform_get_irq(pdev, 0);
+       irq = platform_get_irq_optional(pdev, 0);
        if (irq >= 0) {
                girq = &gs->gc.irq;
                gpio_irq_chip_set_chip(girq, &gpio_mlxbf3_irqchip);