serial: 8250: Switch to use hrtimer_setup()

hrtimer_setup() takes the callback function pointer as argument and
initializes the timer completely.

Replace hrtimer_init() and the open coded initialization of
hrtimer::function with the new setup mechanism.

Patch was created by using Coccinelle.

Acked-by: Zack Rusin <[email protected]>
Signed-off-by: Nam Cao <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Link: https://lore.kernel.org/r/991926d130cc272df30d226760d5d74187991669.1738746904.git.namcao@linutronix.de
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: covanam

drivers/tty/serial/8250/8250_bcm7271.c

@@ -1056,8 +1056,7 @@ static int brcmuart_probe(struct platform_device *pdev)
 	}
 
 	/* setup HR timer */
-	hrtimer_init(&priv->hrt, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
-	priv->hrt.function = brcmuart_hrtimer_func;
+	hrtimer_setup(&priv->hrt, brcmuart_hrtimer_func, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
 
 	up.port.shutdown = brcmuart_shutdown;
 	up.port.startup = brcmuart_startup;

drivers/tty/serial/8250/8250_port.c

@@ -566,12 +566,10 @@ static int serial8250_em485_init(struct uart_8250_port *p)
 	if (!p->em485)
 		return -ENOMEM;
 
-	hrtimer_init(&p->em485->stop_tx_timer, CLOCK_MONOTONIC,
-		     HRTIMER_MODE_REL);
-	hrtimer_init(&p->em485->start_tx_timer, CLOCK_MONOTONIC,
-		     HRTIMER_MODE_REL);
-	p->em485->stop_tx_timer.function = &serial8250_em485_handle_stop_tx;
-	p->em485->start_tx_timer.function = &serial8250_em485_handle_start_tx;
+	hrtimer_setup(&p->em485->stop_tx_timer, &serial8250_em485_handle_stop_tx, CLOCK_MONOTONIC,
+		      HRTIMER_MODE_REL);
+	hrtimer_setup(&p->em485->start_tx_timer, &serial8250_em485_handle_start_tx, CLOCK_MONOTONIC,
+		      HRTIMER_MODE_REL);
 	p->em485->port = p;
 	p->em485->active_timer = NULL;
 	p->em485->tx_stopped = true;