serial: cpm_uart: use container_of to resolve uart_cpm_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/cpm_uart/cpm_uart_core.c b/drivers/tty/serial/cpm_uart/cpm_uart_core.c
index 533852e..638afd3 100644 (file)
--- a/drivers/tty/serial/cpm_uart/cpm_uart_core.c
+++ b/drivers/tty/serial/cpm_uart/cpm_uart_core.c
@@ -80,7 +80,8 @@ static void cpm_uart_initbd(struct uart_cpm_port *pinfo);
 */
 static unsigned int cpm_uart_tx_empty(struct uart_port *port)
 {
-       struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port;
+       struct uart_cpm_port *pinfo =
+               container_of(port, struct uart_cpm_port, port);
        cbd_t __iomem *bdp = pinfo->tx_bd_base;
        int ret = 0;
 
@@ -102,7 +103,8 @@ static unsigned int cpm_uart_tx_empty(struct uart_port *port)
 
 static void cpm_uart_set_mctrl(struct uart_port *port, unsigned int mctrl)
 {
-       struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port;
+       struct uart_cpm_port *pinfo =
+               container_of(port, struct uart_cpm_port, port);
 
        if (pinfo->gpios[GPIO_RTS] >= 0)
                gpio_set_value(pinfo->gpios[GPIO_RTS], !(mctrl & TIOCM_RTS));
@@ -113,7 +115,8 @@ static void cpm_uart_set_mctrl(struct uart_port *port, unsigned int mctrl)
 
 static unsigned int cpm_uart_get_mctrl(struct uart_port *port)
 {
-       struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port;
+       struct uart_cpm_port *pinfo =
+               container_of(port, struct uart_cpm_port, port);
        unsigned int mctrl = TIOCM_CTS | TIOCM_DSR | TIOCM_CAR;
 
        if (pinfo->gpios[GPIO_CTS] >= 0) {
@@ -144,7 +147,8 @@ static unsigned int cpm_uart_get_mctrl(struct uart_port *port)
  */
 static void cpm_uart_stop_tx(struct uart_port *port)
 {
-       struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port;
+       struct uart_cpm_port *pinfo =
+               container_of(port, struct uart_cpm_port, port);
        smc_t __iomem *smcp = pinfo->smcp;
        scc_t __iomem *sccp = pinfo->sccp;
 
@@ -161,7 +165,8 @@ static void cpm_uart_stop_tx(struct uart_port *port)
  */
 static void cpm_uart_start_tx(struct uart_port *port)
 {
-       struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port;
+       struct uart_cpm_port *pinfo =
+               container_of(port, struct uart_cpm_port, port);
        smc_t __iomem *smcp = pinfo->smcp;
        scc_t __iomem *sccp = pinfo->sccp;
 
@@ -189,7 +194,8 @@ static void cpm_uart_start_tx(struct uart_port *port)
  */
 static void cpm_uart_stop_rx(struct uart_port *port)
 {
-       struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port;
+       struct uart_cpm_port *pinfo =
+               container_of(port, struct uart_cpm_port, port);
        smc_t __iomem *smcp = pinfo->smcp;
        scc_t __iomem *sccp = pinfo->sccp;
 
@@ -206,7 +212,8 @@ static void cpm_uart_stop_rx(struct uart_port *port)
  */
 static void cpm_uart_break_ctl(struct uart_port *port, int break_state)
 {
-       struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port;
+       struct uart_cpm_port *pinfo =
+               container_of(port, struct uart_cpm_port, port);
 
        pr_debug("CPM uart[%d]:break ctrl, break_state: %d\n", port->line,
                break_state);
@@ -240,7 +247,8 @@ static void cpm_uart_int_rx(struct uart_port *port)
        unsigned char ch;
        u8 *cp;
        struct tty_port *tport = &port->state->port;
-       struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port;
+       struct uart_cpm_port *pinfo =
+               container_of(port, struct uart_cpm_port, port);
        cbd_t __iomem *bdp;
        u16 status;
        unsigned int flg;
@@ -397,7 +405,8 @@ static irqreturn_t cpm_uart_int(int irq, void *data)
 static int cpm_uart_startup(struct uart_port *port)
 {
        int retval;
-       struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port;
+       struct uart_cpm_port *pinfo =
+               container_of(port, struct uart_cpm_port, port);
 
        pr_debug("CPM uart[%d]:startup\n", port->line);
 
@@ -442,7 +451,8 @@ inline void cpm_uart_wait_until_send(struct uart_cpm_port *pinfo)
  */
 static void cpm_uart_shutdown(struct uart_port *port)
 {
-       struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port;
+       struct uart_cpm_port *pinfo =
+               container_of(port, struct uart_cpm_port, port);
 
        pr_debug("CPM uart[%d]:shutdown\n", port->line);
 
@@ -492,7 +502,8 @@ static void cpm_uart_set_termios(struct uart_port *port,
        unsigned long flags;
        u16 cval, scval, prev_mode;
        int bits, sbits;
-       struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port;
+       struct uart_cpm_port *pinfo =
+               container_of(port, struct uart_cpm_port, port);
        smc_t __iomem *smcp = pinfo->smcp;
        scc_t __iomem *sccp = pinfo->sccp;
        int maxidl;
@@ -675,7 +686,8 @@ static int cpm_uart_tx_pump(struct uart_port *port)
        cbd_t __iomem *bdp;
        u8 *p;
        int count;
-       struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port;
+       struct uart_cpm_port *pinfo =
+               container_of(port, struct uart_cpm_port, port);
        struct circ_buf *xmit = &port->state->xmit;
 
        /* Handle xon/xoff */
@@ -906,7 +918,8 @@ static void cpm_uart_init_smc(struct uart_cpm_port *pinfo)
  */
 static int cpm_uart_request_port(struct uart_port *port)
 {
-       struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port;
+       struct uart_cpm_port *pinfo =
+               container_of(port, struct uart_cpm_port, port);
        int ret;
 
        pr_debug("CPM uart[%d]:request port\n", port->line);
@@ -938,7 +951,8 @@ static int cpm_uart_request_port(struct uart_port *port)
 
 static void cpm_uart_release_port(struct uart_port *port)
 {
-       struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port;
+       struct uart_cpm_port *pinfo =
+               container_of(port, struct uart_cpm_port, port);
 
        if (!(pinfo->flags & FLAG_CONSOLE))
                cpm_uart_freebuf(pinfo);
@@ -1082,7 +1096,8 @@ static int poll_wait_key(char *obuf, struct uart_cpm_port *pinfo)
 
 static int cpm_get_poll_char(struct uart_port *port)
 {
-       struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port;
+       struct uart_cpm_port *pinfo =
+               container_of(port, struct uart_cpm_port, port);
 
        if (!serial_polled) {
                serial_polled = 1;
@@ -1099,7 +1114,8 @@ static int cpm_get_poll_char(struct uart_port *port)
 static void cpm_put_poll_char(struct uart_port *port,
                         unsigned char c)
 {
-       struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port;
+       struct uart_cpm_port *pinfo =
+               container_of(port, struct uart_cpm_port, port);
        static char ch[2];
 
        ch[0] = (char)c;