diff --git a/drivers/tty/serial/sc16is7xx.c b/drivers/tty/serial/sc16is7xx.c
index 72e4c4f80f7f..335695d0e7aa 100644
--- a/drivers/tty/serial/sc16is7xx.c
+++ b/drivers/tty/serial/sc16is7xx.c
@@ -837,10 +837,9 @@ static bool sc16is7xx_port_irq(struct sc16is7xx_port *s, int portno)
 
 static irqreturn_t sc16is7xx_irq(int irq, void *dev_id)
 {
+	struct sc16is7xx_port *s = dev_id;
 	bool keep_polling;
 
-	struct sc16is7xx_port *s = (struct sc16is7xx_port *)dev_id;
-
 	do {
 		int i;