linux-kernel - [PATCH 07/13 linux-next] tty: use container_of to resolve uart_pmac_port from uart

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Message-Id: <1412528475-1449-8-git-send-email-fabf@skynet.be>
Date:	Sun,  5 Oct 2014 19:01:08 +0200
From:	Fabian Frederick <fabf@...net.be>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Fabian Frederick <fabf@...net.be>, Jiri Slaby <jslaby@...e.cz>,
	linux-serial@...r.kernel.org
Subject: [PATCH 07/13 linux-next] tty: use container_of to resolve uart_pmac_port from uart_port

Use container_of instead of casting first structure member.

Signed-off-by: Fabian Frederick <fabf@...net.be>
---
 drivers/tty/serial/pmac_zilog.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/tty/serial/pmac_zilog.c b/drivers/tty/serial/pmac_zilog.c
index abbfedb..4aca322 100644
--- a/drivers/tty/serial/pmac_zilog.c
+++ b/drivers/tty/serial/pmac_zilog.c
@@ -1352,7 +1352,8 @@ static int pmz_verify_port(struct uart_port *port, struct serial_struct *ser)
 
 static int pmz_poll_get_char(struct uart_port *port)
 {
-	struct uart_pmac_port *uap = (struct uart_pmac_port *)port;
+	struct uart_pmac_port *uap =
+		container_of(port, struct uart_pmac_port, port);
 	int tries = 2;
 
 	while (tries) {
@@ -1367,7 +1368,8 @@ static int pmz_poll_get_char(struct uart_port *port)
 
 static void pmz_poll_put_char(struct uart_port *port, unsigned char c)
 {
-	struct uart_pmac_port *uap = (struct uart_pmac_port *)port;
+	struct uart_pmac_port *uap =
+		container_of(port, struct uart_pmac_port, port);
 
 	/* Wait for the transmit buffer to empty. */
 	while ((read_zsreg(uap, R0) & Tx_BUF_EMP) == 0)
@@ -1954,7 +1956,8 @@ static void __exit exit_pmz(void)
 
 static void pmz_console_putchar(struct uart_port *port, int ch)
 {
-	struct uart_pmac_port *uap = (struct uart_pmac_port *)port;
+	struct uart_pmac_port *uap =
+		container_of(port, struct uart_pmac_port, port);
 
 	/* Wait for the transmit buffer to empty. */
 	while ((read_zsreg(uap, R0) & Tx_BUF_EMP) == 0)
-- 
1.9.1

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