TTY: amiserial, define local tty_port pointer

And use it to make the code more readable.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 42 insertions, 39 deletions

diff --git a/drivers/tty/amiserial.c b/drivers/tty/amiserial.c
index 7d798262d0c2..a9f5da64eef2 100644
--- a/drivers/tty/amiserial.c
+++ b/drivers/tty/amiserial.c
@@ -361,6 +361,7 @@ static void transmit_chars(struct serial_state *info)
 
 static void check_modem_status(struct serial_state *info)
 {
+        struct tty_port *port = &info->tport;
         unsigned char status = ciab.pra & (SER_DCD | SER_CTS | SER_DSR);
         unsigned char dstatus;
         struct  async_icount *icount;
@@ -377,45 +378,45 @@ static void check_modem_status(struct serial_state *info)
                 if (dstatus & SER_DCD) {
                         icount->dcd++;
 #ifdef CONFIG_HARD_PPS
-                        if ((info->tport.flags & ASYNC_HARDPPS_CD) &&
+                        if ((port->flags & ASYNC_HARDPPS_CD) &&
                             !(status & SER_DCD))
                                 hardpps();
 #endif
                 }
                 if (dstatus & SER_CTS)
                         icount->cts++;
-                wake_up_interruptible(&info->tport.delta_msr_wait);
+                wake_up_interruptible(&port->delta_msr_wait);
         }
 
-        if ((info->tport.flags & ASYNC_CHECK_CD) && (dstatus & SER_DCD)) {
+        if ((port->flags & ASYNC_CHECK_CD) && (dstatus & SER_DCD)) {
 #if (defined(SERIAL_DEBUG_OPEN) || defined(SERIAL_DEBUG_INTR))
                 printk("ttyS%d CD now %s...", info->line,
                        (!(status & SER_DCD)) ? "on" : "off");
 #endif
                 if (!(status & SER_DCD))
-                        wake_up_interruptible(&info->tport.open_wait);
+                        wake_up_interruptible(&port->open_wait);
                 else {
 #ifdef SERIAL_DEBUG_OPEN
                         printk("doing serial hangup...");
 #endif
-                        if (info->tport.tty)
-                                tty_hangup(info->tport.tty);
+                        if (port->tty)
+                                tty_hangup(port->tty);
                 }
         }
-        if (info->tport.flags & ASYNC_CTS_FLOW) {
-                if (info->tport.tty->hw_stopped) {
+        if (port->flags & ASYNC_CTS_FLOW) {
+                if (port->tty->hw_stopped) {
                         if (!(status & SER_CTS)) {
 #if (defined(SERIAL_DEBUG_INTR) || defined(SERIAL_DEBUG_FLOW))
                                 printk("CTS tx start...");
 #endif
-                                info->tport.tty->hw_stopped = 0;
+                                port->tty->hw_stopped = 0;
                                 info->IER |= UART_IER_THRI;
                                 custom.intena = IF_SETCLR | IF_TBE;
                                 mb();
                                 /* set a pending Tx Interrupt, transmitter should restart now */
                                 custom.intreq = IF_SETCLR | IF_TBE;
                                 mb();
-                                tty_wakeup(info->tport.tty);
+                                tty_wakeup(port->tty);
                                 return;
                         }
                 } else {
@@ -423,7 +424,7 @@ static void check_modem_status(struct serial_state *info)
 #if (defined(SERIAL_DEBUG_INTR) || defined(SERIAL_DEBUG_FLOW))
                                 printk("CTS tx stop...");
 #endif
-                                info->tport.tty->hw_stopped = 1;
+                                port->tty->hw_stopped = 1;
                                 info->IER &= ~UART_IER_THRI;
                                 /* disable Tx interrupt and remove any pending interrupts */
                                 custom.intena = IF_TBE;
@@ -1371,6 +1372,7 @@ static void rs_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
 static void rs_close(struct tty_struct *tty, struct file * filp)
 {
         struct serial_state *state = tty->driver_data;
+        struct tty_port *port = &state->tport;
         unsigned long flags;
 
         if (!state || serial_paranoia_check(state, tty->name, "rs_close"))
@@ -1385,38 +1387,38 @@ static void rs_close(struct tty_struct *tty, struct file * filp)
         }
 
 #ifdef SERIAL_DEBUG_OPEN
-        printk("rs_close ttys%d, count = %d\n", state->line, state->tport.count);
+        printk("rs_close ttys%d, count = %d\n", state->line, port->count);
 #endif
-        if ((tty->count == 1) && (state->tport.count != 1)) {
+        if ((tty->count == 1) && (port->count != 1)) {
                 /*
                  * Uh, oh.  tty->count is 1, which means that the tty
-                 * structure will be freed.  state->tport.count should always
+                 * structure will be freed.  port->count should always
                  * be one in these conditions.  If it's greater than
                  * one, we've got real problems, since it means the
                  * serial port won't be shutdown.
                  */
                 printk("rs_close: bad serial port count; tty->count is 1, "
-                       "state->tport.count is %d\n", state->tport.count);
-                state->tport.count = 1;
+                       "port->count is %d\n", state->tport.count);
+                port->count = 1;
         }
-        if (--state->tport.count < 0) {
+        if (--port->count < 0) {
                 printk("rs_close: bad serial port count for ttys%d: %d\n",
-                       state->line, state->tport.count);
-                state->tport.count = 0;
+                       state->line, port->count);
+                port->count = 0;
         }
-        if (state->tport.count) {
+        if (port->count) {
                 DBG_CNT("before DEC-2");
                 local_irq_restore(flags);
                 return;
         }
-        state->tport.flags |= ASYNC_CLOSING;
+        port->flags |= ASYNC_CLOSING;
         /*
          * Now we wait for the transmit buffer to clear; and we notify 
          * the line discipline to only process XON/XOFF characters.
          */
         tty->closing = 1;
-        if (state->tport.closing_wait != ASYNC_CLOSING_WAIT_NONE)
-                tty_wait_until_sent(tty, state->tport.closing_wait);
+        if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE)
+                tty_wait_until_sent(tty, port->closing_wait);
         /*
          * At this point we stop accepting input.  To do this, we
          * disable the receive line status interrupts, and tell the
@@ -1424,7 +1426,7 @@ static void rs_close(struct tty_struct *tty, struct file * filp)
          * line status register.
          */
         state->read_status_mask &= ~UART_LSR_DR;
-        if (state->tport.flags & ASYNC_INITIALIZED) {
+        if (port->flags & ASYNC_INITIALIZED) {
                 /* disable receive interrupts */
                 custom.intena = IF_RBF;
                 mb();
@@ -1444,15 +1446,15 @@ static void rs_close(struct tty_struct *tty, struct file * filp)
                 
         tty_ldisc_flush(tty);
         tty->closing = 0;
-        state->tport.tty = NULL;
-        if (state->tport.blocked_open) {
-                if (state->tport.close_delay) {
-                        msleep_interruptible(jiffies_to_msecs(state->tport.close_delay));
+        port->tty = NULL;
+        if (port->blocked_open) {
+                if (port->close_delay) {
+                        msleep_interruptible(jiffies_to_msecs(port->close_delay));
                 }
-                wake_up_interruptible(&state->tport.open_wait);
+                wake_up_interruptible(&port->open_wait);
         }
-        state->tport.flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
-        wake_up_interruptible(&state->tport.close_wait);
+        port->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
+        wake_up_interruptible(&port->close_wait);
         local_irq_restore(flags);
 }
 
@@ -1661,29 +1663,30 @@ static int block_til_ready(struct tty_struct *tty, struct file * filp,
 static int rs_open(struct tty_struct *tty, struct file * filp)
 {
         struct serial_state *info = rs_table + tty->index;
+        struct tty_port *port = &info->tport;
         int retval;
 
-        info->tport.count++;
-        info->tport.tty = tty;
+        port->count++;
+        port->tty = tty;
         tty->driver_data = info;
-        tty->port = &info->tport;
+        tty->port = port;
         if (serial_paranoia_check(info, tty->name, "rs_open"))
                 return -ENODEV;
 
 #ifdef SERIAL_DEBUG_OPEN
         printk("rs_open %s, count = %d\n", tty->name, info->count);
 #endif
-        tty->low_latency = (info->tport.flags & ASYNC_LOW_LATENCY) ? 1 : 0;
+        tty->low_latency = (port->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
 
         /*
          * If the port is the middle of closing, bail out now
          */
         if (tty_hung_up_p(filp) ||
-            (info->tport.flags & ASYNC_CLOSING)) {
-                if (info->tport.flags & ASYNC_CLOSING)
-                        interruptible_sleep_on(&info->tport.close_wait);
+            (port->flags & ASYNC_CLOSING)) {
+                if (port->flags & ASYNC_CLOSING)
+                        interruptible_sleep_on(&port->close_wait);
 #ifdef SERIAL_DO_RESTART
-                return ((info->tport.flags & ASYNC_HUP_NOTIFY) ?
+                return ((port->flags & ASYNC_HUP_NOTIFY) ?
                         -EAGAIN : -ERESTARTSYS);
 #else
                 return -EAGAIN;