[PATCH v1 1/1] serial: core: Drop duplicate NULL check in uart_*shutdown()

[Andy Shevchenko <andriy.shevchenko@linux.intel.com>]

The free_page(addr), which becomes free_pages(addr, 0) checks addr
against 0. No need to repeat this check in the callers.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/tty/serial/serial_core.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index 57f472268b6d..59f93040d807 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -328,8 +328,7 @@ static void uart_shutdown(struct tty_struct *tty, struct uart_state *state)
 	state->xmit.buf = NULL;
 	spin_unlock_irqrestore(&uport->lock, flags);
 
-	if (xmit_buf)
-		free_page((unsigned long)xmit_buf);
+	free_page((unsigned long)xmit_buf);
 }
 
 /**
@@ -1621,8 +1620,7 @@ static void uart_tty_port_shutdown(struct tty_port *port)
 	state->xmit.buf = NULL;
 	spin_unlock_irq(&uport->lock);
 
-	if (buf)
-		free_page((unsigned long)buf);
+	free_page((unsigned long)buf);
 }
 
 static void uart_wait_until_sent(struct tty_struct *tty, int timeout)
-- 
2.34.1