[PATCH 1/3] serial: qcom-geni: Propagate 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 IRQ is available, while other errors should be propagated.

Propagate errors such as -EPROBE_DEFER and -EINVAL instead of continuing
probe without the IRQ.

Signed-off-by: bui duc phuc <phucduc.bui@gmail.com>
---
 drivers/tty/serial/qcom_geni_serial.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c
index 7ead87b4eb65..240a6d67d847 100644
--- a/drivers/tty/serial/qcom_geni_serial.c
+++ b/drivers/tty/serial/qcom_geni_serial.c
@@ -1883,8 +1883,13 @@ static int qcom_geni_serial_probe(struct platform_device *pdev)
 	uport->irq = irq;
 	uport->has_sysrq = IS_ENABLED(CONFIG_SERIAL_QCOM_GENI_CONSOLE);
 
-	if (!data->console)
+	if (!data->console) {
 		port->wakeup_irq = platform_get_irq_optional(pdev, 1);
+		if (port->wakeup_irq < 0 && port->wakeup_irq != -ENXIO) {
+			ret = port->wakeup_irq;
+			goto error;
+		}
+	}
 
 	if (of_property_read_bool(pdev->dev.of_node, "rx-tx-swap"))
 		port->rx_tx_swap = true;
-- 
2.43.0