linux-kernel - [PATCH v1] serial: sc16is7xx: Extend IRQ check for negative valus

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Message-ID: <20250116093203.460215-1-andre.werner@systec-electronic.com>
Date: Thu, 16 Jan 2025 10:32:03 +0100
From: Andre Werner <andre.werner@...tec-electronic.com>
To: gregkh@...uxfoundation.org,
	jirislaby@...nel.org,
	hvilleneuve@...onoff.com,
	andy@...nel.org
Cc: linux-kernel@...r.kernel.org,
	linux-serial@...r.kernel.org,
	lech.perczak@...lingroup.com,
	Andre Werner <andre.werner@...tec-electronic.com>
Subject: [PATCH v1] serial: sc16is7xx: Extend IRQ check for negative valus

Fix the IRQ check to treat the negative values as No IRQ.

Signed-off-by: Andre Werner <andre.werner@...tec-electronic.com>
---
 drivers/tty/serial/sc16is7xx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/tty/serial/sc16is7xx.c b/drivers/tty/serial/sc16is7xx.c
index 7b51cdc274fd..560f45ed19ae 100644
--- a/drivers/tty/serial/sc16is7xx.c
+++ b/drivers/tty/serial/sc16is7xx.c
@@ -1561,7 +1561,7 @@ int sc16is7xx_probe(struct device *dev, const struct sc16is7xx_devtype *devtype,
 	/* Always ask for fixed clock rate from a property. */
 	device_property_read_u32(dev, "clock-frequency", &uartclk);
 
-	s->polling = !!irq;
+	s->polling = (irq <= 0);
 	if (s->polling)
 		dev_dbg(dev,
 			"No interrupt pin definition, falling back to polling mode\n");
-- 
2.48.0