tty: ar933x_uart: use container_of to resolve ar933x_uart_port from uart_port

Use container_of instead of casting first structure member.

Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/ar933x_uart.c b/drivers/tty/serial/ar933x_uart.c
index 0be1c45efd659145189f95cc739ef5c8198bda6b..2739361a86f1049f3fffc5306deb15e87f062e69 100644 (file)
--- a/drivers/tty/serial/ar933x_uart.c
+++ b/drivers/tty/serial/ar933x_uart.c
@@ -119,7 +119,8 @@ static inline void ar933x_uart_putc(struct ar933x_uart_port *up, int ch)
 
 static unsigned int ar933x_uart_tx_empty(struct uart_port *port)
 {
-       struct ar933x_uart_port *up = (struct ar933x_uart_port *) port;
+       struct ar933x_uart_port *up =
+               container_of(port, struct ar933x_uart_port, port);
        unsigned long flags;
        unsigned int rdata;
 
@@ -141,21 +142,24 @@ static void ar933x_uart_set_mctrl(struct uart_port *port, unsigned int mctrl)
 
 static void ar933x_uart_start_tx(struct uart_port *port)
 {
-       struct ar933x_uart_port *up = (struct ar933x_uart_port *) port;
+       struct ar933x_uart_port *up =
+               container_of(port, struct ar933x_uart_port, port);
 
        ar933x_uart_start_tx_interrupt(up);
 }
 
 static void ar933x_uart_stop_tx(struct uart_port *port)
 {
-       struct ar933x_uart_port *up = (struct ar933x_uart_port *) port;
+       struct ar933x_uart_port *up =
+               container_of(port, struct ar933x_uart_port, port);
 
        ar933x_uart_stop_tx_interrupt(up);
 }
 
 static void ar933x_uart_stop_rx(struct uart_port *port)
 {
-       struct ar933x_uart_port *up = (struct ar933x_uart_port *) port;
+       struct ar933x_uart_port *up =
+               container_of(port, struct ar933x_uart_port, port);
 
        up->ier &= ~AR933X_UART_INT_RX_VALID;
        ar933x_uart_write(up, AR933X_UART_INT_EN_REG, up->ier);
@@ -163,7 +167,8 @@ static void ar933x_uart_stop_rx(struct uart_port *port)
 
 static void ar933x_uart_break_ctl(struct uart_port *port, int break_state)
 {
-       struct ar933x_uart_port *up = (struct ar933x_uart_port *) port;
+       struct ar933x_uart_port *up =
+               container_of(port, struct ar933x_uart_port, port);
        unsigned long flags;
 
        spin_lock_irqsave(&up->port.lock, flags);
@@ -231,7 +236,8 @@ static void ar933x_uart_set_termios(struct uart_port *port,
                                    struct ktermios *new,
                                    struct ktermios *old)
 {
-       struct ar933x_uart_port *up = (struct ar933x_uart_port *) port;
+       struct ar933x_uart_port *up =
+               container_of(port, struct ar933x_uart_port, port);
        unsigned int cs;
        unsigned long flags;
        unsigned int baud, scale, step;
@@ -404,7 +410,8 @@ static irqreturn_t ar933x_uart_interrupt(int irq, void *dev_id)
 
 static int ar933x_uart_startup(struct uart_port *port)
 {
-       struct ar933x_uart_port *up = (struct ar933x_uart_port *) port;
+       struct ar933x_uart_port *up =
+               container_of(port, struct ar933x_uart_port, port);
        unsigned long flags;
        int ret;
 
@@ -430,7 +437,8 @@ static int ar933x_uart_startup(struct uart_port *port)
 
 static void ar933x_uart_shutdown(struct uart_port *port)
 {
-       struct ar933x_uart_port *up = (struct ar933x_uart_port *) port;
+       struct ar933x_uart_port *up =
+               container_of(port, struct ar933x_uart_port, port);
 
        /* Disable all interrupts */
        up->ier = 0;
@@ -468,7 +476,8 @@ static void ar933x_uart_config_port(struct uart_port *port, int flags)
 static int ar933x_uart_verify_port(struct uart_port *port,
                                   struct serial_struct *ser)
 {
-       struct ar933x_uart_port *up = (struct ar933x_uart_port *) port;
+       struct ar933x_uart_port *up =
+               container_of(port, struct ar933x_uart_port, port);
 
        if (ser->type != PORT_UNKNOWN &&
            ser->type != PORT_AR933X)
@@ -521,7 +530,8 @@ static void ar933x_uart_wait_xmitr(struct ar933x_uart_port *up)
 
 static void ar933x_uart_console_putchar(struct uart_port *port, int ch)
 {
-       struct ar933x_uart_port *up = (struct ar933x_uart_port *) port;
+       struct ar933x_uart_port *up =
+               container_of(port, struct ar933x_uart_port, port);
 
        ar933x_uart_wait_xmitr(up);
        ar933x_uart_putc(up, ch);