gpio: mlxbf2: use platform_get_irq_optional()

commit 63c7bc53a35e785accdc2ceab8f72d94501931ab upstream.

The gpio-mlxbf2 driver interfaces with four GPIO controllers,
device instances 0-3. There are two IRQ resources shared between
the four controllers, and they are found in the ACPI table for
instances 0 and 3. The driver should not use platform_get_irq(),
otherwise this error is logged when probing instances 1 and 2:
  mlxbf2_gpio MLNXBF22:01: error -ENXIO: IRQ index 0 not found

Fixes: 2b725265cb08 ("gpio: mlxbf2: Introduce IRQ support")
Cc: stable@vger.kernel.org
Signed-off-by: David Thompson <davthompson@nvidia.com>
Reviewed-by: Shravan Kumar Ramani <shravankr@nvidia.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Link: https://lore.kernel.org/r/20250728144619.29894-1-davthompson@nvidia.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpio/gpio-mlxbf2.c b/drivers/gpio/gpio-mlxbf2.c
index 77a41151c921bd790bab6a99363408f385ff864d..b306722ee8b28ce872672d7c0891f8dc3b41f80f 100644 (file)
--- a/drivers/gpio/gpio-mlxbf2.c
+++ b/drivers/gpio/gpio-mlxbf2.c
@@ -374,7 +374,7 @@ mlxbf2_gpio_probe(struct platform_device *pdev)
        gc->ngpio = npins;
        gc->owner = THIS_MODULE;
 
-       irq = platform_get_irq(pdev, 0);
+       irq = platform_get_irq_optional(pdev, 0);
        if (irq >= 0) {
                gs->irq_chip.name = name;
                gs->irq_chip.irq_set_type = mlxbf2_gpio_irq_set_type;