[PATCH 3/3] serial: 8250_mtk: Propagate errors from optional IRQ lookup
[email protected] Fri, 7 Aug 2026 16:09:45 +0700
| Newsgroups | org.kernel.vger.linux-serial,dev.linux.lists.imx,org.infradead.lists.linux-arm-kernel,org.infradead.lists.linux-mediatek,org.kernel.vger.linux-arm-msm,org.kernel.vger.linux-kernel |
|---|---|
| Message-ID | <[email protected]> |
From: bui duc phuc <[email protected]> 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 <[email protected]> --- drivers/tty/serial/8250/8250_mtk.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/tty/serial/8250/8250_mtk.c b/drivers/tty/serial/8250/8250_mtk.c index e6a56cf54ae0..d0d2aecf9005 100644 --- a/drivers/tty/serial/8250/8250_mtk.c +++ b/drivers/tty/serial/8250/8250_mtk.c @@ -587,6 +587,8 @@ static int mtk8250_probe(struct platform_device *pdev) return data->line; data->rx_wakeup_irq = platform_get_irq_optional(pdev, 1); + if (data->rx_wakeup_irq < 0 && data->rx_wakeup_irq != -ENXIO) + return data->rx_wakeup_irq; pm_runtime_set_active(&pdev->dev); pm_runtime_enable(&pdev->dev); -- 2.43.0