tty/serial: altera_uart: Convert timers to use timer_setup()

In preparation for unconditionally passing the struct timer_list pointer to
all timer callbacks, switch to using the new timer_setup() and from_timer()
to pass the timer pointer explicitly.

Cc: Tobias Klauser <tklauser@distanz.ch>
Cc: Jiri Slaby <jslaby@suse.com>
Cc: linux-serial@vger.kernel.org
Cc: nios2-dev@lists.rocketboards.org
Signed-off-by: NKees Cook <keescook@chromium.org>
Acked-by: NTobias Klauser <tklauser@distanz.ch>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/altera_uart.c

@@ -288,10 +288,10 @@ static irqreturn_t altera_uart_interrupt(int irq, void *data)
 	return IRQ_RETVAL(isr);
 }
 
-static void altera_uart_timer(unsigned long data)
+static void altera_uart_timer(struct timer_list *t)
 {
-	struct uart_port *port = (void *)data;
-	struct altera_uart *pp = container_of(port, struct altera_uart, port);
+	struct altera_uart *pp = from_timer(pp, t, tmr);
+	struct uart_port *port = &pp->port;
 
 	altera_uart_interrupt(0, port);
 	mod_timer(&pp->tmr, jiffies + uart_poll_timeout(port));
@@ -314,7 +314,7 @@ static int altera_uart_startup(struct uart_port *port)
 	int ret;
 
 	if (!port->irq) {
-		setup_timer(&pp->tmr, altera_uart_timer, (unsigned long)port);
+		timer_setup(&pp->tmr, altera_uart_timer, 0);
 		mod_timer(&pp->tmr, jiffies + uart_poll_timeout(port));
 		return 0;
 	}