[PATCH 3/4] gpio: mlxbf2: Handle errors from optional IRQ lookup

[phucduc.bui@gmail.com]

From: bui duc phuc <phucduc.bui@gmail.com>

platform_get_irq_optional() returns a positive IRQ number on success or
a negative error code on failure. For an optional IRQ, -ENXIO indicates
that no optional IRQ is available. Other errors, such as -EPROBE_DEFER
and -EINVAL, should be propagated so that the caller can handle them
appropriately.

Propagate negative errors other than -ENXIO.

Signed-off-by: bui duc phuc <phucduc.bui@gmail.com>
---
 drivers/gpio/gpio-mlxbf2.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpio/gpio-mlxbf2.c b/drivers/gpio/gpio-mlxbf2.c
index 4e2f3381d82b..4e5c5d196a50 100644
--- a/drivers/gpio/gpio-mlxbf2.c
+++ b/drivers/gpio/gpio-mlxbf2.c
@@ -394,7 +394,9 @@ mlxbf2_gpio_probe(struct platform_device *pdev)
 	gc->owner = THIS_MODULE;
 
 	irq = platform_get_irq_optional(pdev, 0);
-	if (irq >= 0) {
+	if (irq < 0 && irq != -ENXIO)
+		return irq;
+	if (irq > 0) {
 		girq = &gs->chip.gc.irq;
 		gpio_irq_chip_set_chip(girq, &mlxbf2_gpio_irq_chip);
 		girq->handler = handle_simple_irq;
-- 
2.43.0