n_tty: clean up old code to follow coding style and (mostly) checkpatch

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 73 insertions, 75 deletions

diff --git a/drivers/char/n_tty.c b/drivers/char/n_tty.c
index 90c3969012a3..46b2a1cc8b54 100644
--- a/drivers/char/n_tty.c
+++ b/drivers/char/n_tty.c
@@ -1,6 +1,6 @@
 /*
  * n_tty.c --- implements the N_TTY line discipline.
- * 
+ *
  * This code used to be in tty_io.c, but things are getting hairy
  * enough that it made sense to split things off.  (The N_TTY
  * processing has changed so much that it's hardly recognizable,
@@ -8,19 +8,19 @@
  *
  * Note that the open routine for N_TTY is guaranteed never to return
  * an error.  This is because Linux will fall back to setting a line
- * to N_TTY if it can not switch to any other line discipline.  
+ * to N_TTY if it can not switch to any other line discipline.
  *
  * Written by Theodore Ts'o, Copyright 1994.
- * 
+ *
  * This file also contains code originally written by Linus Torvalds,
  * Copyright 1991, 1992, 1993, and by Julian Cowley, Copyright 1994.
- * 
+ *
  * This file may be redistributed under the terms of the GNU General Public
  * License.
  *
  * Reduced memory usage for older ARM systems  - Russell King.
  *
- * 2000/01/20   Fixed SMP locking on put_tty_queue using bits of 
+ * 2000/01/20   Fixed SMP locking on put_tty_queue using bits of
  *              the patch by Andrew J. Kroll <ag784@freenet.buffalo.edu>
  *              who actually finally proved there really was a race.
  *
@@ -144,11 +144,11 @@ static void put_tty_queue(unsigned char c, struct tty_struct *tty)
  *      Can sleep, may be called under the atomic_read_lock mutex but
  *      this is not guaranteed.
  */
- 
-static void check_unthrottle(struct tty_struct * tty)
+
+static void check_unthrottle(struct tty_struct *tty)
 {
         if (tty->count &&
-            test_and_clear_bit(TTY_THROTTLED, &tty->flags) && 
+            test_and_clear_bit(TTY_THROTTLED, &tty->flags) &&
             tty->driver->unthrottle)
                 tty->driver->unthrottle(tty);
 }
@@ -157,7 +157,7 @@ static void check_unthrottle(struct tty_struct * tty)
  *      reset_buffer_flags      -       reset buffer state
  *      @tty: terminal to reset
  *
- *      Reset the read buffer counters, clear the flags, 
+ *      Reset the read buffer counters, clear the flags,
  *      and make sure the driver is unthrottled. Called
  *      from n_tty_open() and n_tty_flush_buffer().
  */
@@ -186,12 +186,12 @@ static void reset_buffer_flags(struct tty_struct *tty)
  *      FIXME: tty->ctrl_status is not spinlocked and relies on
  *      lock_kernel() still.
  */
- 
-static void n_tty_flush_buffer(struct tty_struct * tty)
+
+static void n_tty_flush_buffer(struct tty_struct *tty)
 {
         /* clear everything and unthrottle the driver */
         reset_buffer_flags(tty);
-        
+
         if (!tty->link)
                 return;
 
@@ -206,9 +206,9 @@ static void n_tty_flush_buffer(struct tty_struct * tty)
  *      @tty: tty device
  *
  *      Report the number of characters buffered to be delivered to user
- *      at this instant in time. 
+ *      at this instant in time.
  */
- 
+
 static ssize_t n_tty_chars_in_buffer(struct tty_struct *tty)
 {
         unsigned long flags;
@@ -234,7 +234,7 @@ static ssize_t n_tty_chars_in_buffer(struct tty_struct *tty)
  *      character. We use this to correctly compute the on screen size
  *      of the character when printing
  */
- 
+
 static inline int is_utf8_continuation(unsigned char c)
 {
         return (c & 0xc0) == 0x80;
@@ -247,7 +247,7 @@ static inline int is_utf8_continuation(unsigned char c)
  *      Returns true if the utf8 character 'c' is a multibyte continuation
  *      character and the terminal is in unicode mode.
  */
- 
+
 static inline int is_continuation(unsigned char c, struct tty_struct *tty)
 {
         return I_IUTF8(tty) && is_utf8_continuation(c);
@@ -266,7 +266,7 @@ static inline int is_continuation(unsigned char c, struct tty_struct *tty)
  *      Called from both the receive and transmit sides and can be called
  *      re-entrantly. Relies on lock_kernel() still.
  */
- 
+
 static int opost(unsigned char c, struct tty_struct *tty)
 {
         int     space, spaces;
@@ -339,9 +339,9 @@ static int opost(unsigned char c, struct tty_struct *tty)
  *
  *      Called from write_chan under the tty layer write lock.
  */
- 
-static ssize_t opost_block(struct tty_struct * tty,
-                       const unsigned char * buf, unsigned int nr)
+
+static ssize_t opost_block(struct tty_struct *tty,
+                       const unsigned char *buf, unsigned int nr)
 {
         int     space;
         int     i;
@@ -386,7 +386,7 @@ static ssize_t opost_block(struct tty_struct * tty,
 break_out:
         if (tty->driver->flush_chars)
                 tty->driver->flush_chars(tty);
-        i = tty->driver->write(tty, buf, i);    
+        i = tty->driver->write(tty, buf, i);
         return i;
 }
 
@@ -398,7 +398,7 @@ break_out:
  *
  *      Queue a byte to the driver layer for output
  */
- 
+
 static inline void put_char(unsigned char c, struct tty_struct *tty)
 {
         tty->driver->put_char(tty, c);
@@ -409,7 +409,7 @@ static inline void put_char(unsigned char c, struct tty_struct *tty)
  *      @c: unicode byte to echo
  *      @tty: terminal device
  *
- *      Echo user input back onto the screen. This must be called only when 
+ *      Echo user input back onto the screen. This must be called only when
  *      L_ECHO(tty) is true. Called from the driver receive_buf path.
  */
 
@@ -441,7 +441,7 @@ static inline void finish_erasing(struct tty_struct *tty)
  *      present in the stream from the driver layer. Handles the complexities
  *      of UTF-8 multibyte symbols.
  */
- 
+
 static void eraser(unsigned char c, struct tty_struct *tty)
 {
         enum { ERASE, WERASE, KILL } kill_type;
@@ -541,7 +541,7 @@ static void eraser(unsigned char c, struct tty_struct *tty)
 
                                 /* should never happen */
                                 if (tty->column > 0x80000000)
-                                        tty->column = 0; 
+                                        tty->column = 0;
 
                                 /* Now backup to that column. */
                                 while (tty->column > col) {
@@ -585,7 +585,7 @@ static void eraser(unsigned char c, struct tty_struct *tty)
  *      settings and character used. Called from the driver receive_buf
  *      path so serialized.
  */
- 
+
 static inline void isig(int sig, struct tty_struct *tty, int flush)
 {
         if (tty->pgrp)
@@ -606,7 +606,7 @@ static inline void isig(int sig, struct tty_struct *tty, int flush)
  *
  *      Called from the receive_buf path so single threaded.
  */
- 
+
 static inline void n_tty_receive_break(struct tty_struct *tty)
 {
         if (I_IGNBRK(tty))
@@ -635,7 +635,7 @@ static inline void n_tty_receive_break(struct tty_struct *tty)
  *      need locking as num_overrun and overrun_time are function
  *      private.
  */
- 
+
 static inline void n_tty_receive_overrun(struct tty_struct *tty)
 {
         char buf[64];
@@ -662,9 +662,8 @@ static inline void n_tty_receive_overrun(struct tty_struct *tty)
 static inline void n_tty_receive_parity_error(struct tty_struct *tty,
                                               unsigned char c)
 {
-        if (I_IGNPAR(tty)) {
+        if (I_IGNPAR(tty))
                 return;
-        }
         if (I_PARMRK(tty)) {
                 put_tty_queue('\377', tty);
                 put_tty_queue('\0', tty);
@@ -682,7 +681,7 @@ static inline void n_tty_receive_parity_error(struct tty_struct *tty,
  *      @c: character
  *
  *      Process an individual character of input received from the driver.
- *      This is serialized with respect to itself by the rules for the 
+ *      This is serialized with respect to itself by the rules for the
  *      driver above.
  */
 
@@ -694,7 +693,7 @@ static inline void n_tty_receive_char(struct tty_struct *tty, unsigned char c)
                 put_tty_queue(c, tty);
                 return;
         }
-        
+
         if (I_ISTRIP(tty))
                 c &= 0x7f;
         if (I_IUCLC(tty) && L_IEXTEN(tty))
@@ -739,7 +738,7 @@ static inline void n_tty_receive_char(struct tty_struct *tty, unsigned char c)
                 put_tty_queue(c, tty);
                 return;
         }
-                
+
         if (c == '\r') {
                 if (I_IGNCR(tty))
                         return;
@@ -825,8 +824,8 @@ send_signal:
                         goto handle_newline;
                 }
                 if (c == EOF_CHAR(tty)) {
-                        if (tty->canon_head != tty->read_head)
-                                set_bit(TTY_PUSH, &tty->flags);
+                        if (tty->canon_head != tty->read_head)
+                                set_bit(TTY_PUSH, &tty->flags);
                         c = __DISABLED_CHAR;
                         goto handle_newline;
                 }
@@ -850,7 +849,7 @@ send_signal:
                         if (I_PARMRK(tty) && c == (unsigned char) '\377')
                                 put_tty_queue(c, tty);
 
-                handle_newline:
+handle_newline:
                         spin_lock_irqsave(&tty->read_lock, flags);
                         set_bit(tty->read_head, tty->read_flags);
                         put_tty_queue_nolock(c, tty);
@@ -863,7 +862,7 @@ send_signal:
                         return;
                 }
         }
-        
+
         finish_erasing(tty);
         if (L_ECHO(tty)) {
                 if (tty->read_cnt >= N_TTY_BUF_SIZE-1) {
@@ -884,7 +883,7 @@ send_signal:
                 put_tty_queue(c, tty);
 
         put_tty_queue(c, tty);
-}       
+}
 
 
 /**
@@ -898,12 +897,10 @@ send_signal:
 
 static void n_tty_write_wakeup(struct tty_struct *tty)
 {
-        if (tty->fasync)
-        {
-                set_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
+        if (tty->fasync) {
+                set_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
                 kill_fasync(&tty->fasync, SIGIO, POLL_OUT);
         }
-        return;
 }
 
 /**
@@ -918,7 +915,7 @@ static void n_tty_write_wakeup(struct tty_struct *tty)
  *      not from interrupt context. The driver is responsible for making
  *      calls one at a time and in order (or using flush_to_ldisc)
  */
- 
+
 static void n_tty_receive_buf(struct tty_struct *tty, const unsigned char *cp,
                               char *fp, int count)
 {
@@ -950,7 +947,7 @@ static void n_tty_receive_buf(struct tty_struct *tty, const unsigned char *cp,
                 tty->read_cnt += i;
                 spin_unlock_irqrestore(&tty->read_lock, cpuflags);
         } else {
-                for (i=count, p = cp, f = fp; i; i--, p++) {
+                for (i = count, p = cp, f = fp; i; i--, p++) {
                         if (f)
                                 flags = *f++;
                         switch (flags) {
@@ -968,7 +965,7 @@ static void n_tty_receive_buf(struct tty_struct *tty, const unsigned char *cp,
                                 n_tty_receive_overrun(tty);
                                 break;
                         default:
-                                printk("%s: unknown flag %d\n",
+                                printk(KERN_ERR "%s: unknown flag %d\n",
                                        tty_name(tty, buf), flags);
                                 break;
                         }
@@ -1001,7 +998,7 @@ static void n_tty_receive_buf(struct tty_struct *tty, const unsigned char *cp,
 int is_ignored(int sig)
 {
         return (sigismember(&current->blocked, sig) ||
-                current->sighand->action[sig-1].sa.sa_handler == SIG_IGN);
+                current->sighand->action[sig-1].sa.sa_handler == SIG_IGN);
 }
 
 /**
@@ -1011,16 +1008,16 @@ int is_ignored(int sig)
  *
  *      Called by the tty layer when the user changes termios flags so
  *      that the line discipline can plan ahead. This function cannot sleep
- *      and is protected from re-entry by the tty layer. The user is 
+ *      and is protected from re-entry by the tty layer. The user is
  *      guaranteed that this function will not be re-entered or in progress
  *      when the ldisc is closed.
  */
- 
-static void n_tty_set_termios(struct tty_struct *tty, struct ktermios * old)
+
+static void n_tty_set_termios(struct tty_struct *tty, struct ktermios *old)
 {
         if (!tty)
                 return;
-        
+
         tty->icanon = (L_ICANON(tty) != 0);
         if (test_bit(TTY_HW_COOK_IN, &tty->flags)) {
                 tty->raw = 1;
@@ -1085,12 +1082,12 @@ static void n_tty_set_termios(struct tty_struct *tty, struct ktermios * old)
  *      n_tty_close             -       close the ldisc for this tty
  *      @tty: device
  *
- *      Called from the terminal layer when this line discipline is 
- *      being shut down, either because of a close or becsuse of a 
+ *      Called from the terminal layer when this line discipline is
+ *      being shut down, either because of a close or becsuse of a
  *      discipline change. The function will not be called while other
  *      ldisc methods are in progress.
  */
- 
+
 static void n_tty_close(struct tty_struct *tty)
 {
         n_tty_flush_buffer(tty);
@@ -1104,7 +1101,7 @@ static void n_tty_close(struct tty_struct *tty)
  *      n_tty_open              -       open an ldisc
  *      @tty: terminal to open
  *
- *      Called when this line discipline is being attached to the 
+ *      Called when this line discipline is being attached to the
  *      terminal device. Can sleep. Called serialized so that no
  *      other events will occur in parallel. No further open will occur
  *      until a close.
@@ -1157,7 +1154,7 @@ static inline int input_available_p(struct tty_struct *tty, int amt)
  *      Called under the tty->atomic_read_lock sem
  *
  */
- 
+
 static int copy_from_read_buf(struct tty_struct *tty,
                                       unsigned char __user **b,
                                       size_t *nr)
@@ -1186,7 +1183,8 @@ static int copy_from_read_buf(struct tty_struct *tty,
         return retval;
 }
 
-extern ssize_t redirected_tty_write(struct file *,const char *,size_t,loff_t *);
+extern ssize_t redirected_tty_write(struct file *, const char *,
+                                                        size_t, loff_t *);
 
 /**
  *      job_control             -       check job control
@@ -1194,10 +1192,10 @@ extern ssize_t redirected_tty_write(struct file *,const char *,size_t,loff_t *);
  *      @file: file handle
  *
  *      Perform job control management checks on this file/tty descriptor
- *      and if appropriate send any needed signals and return a negative 
+ *      and if appropriate send any needed signals and return a negative
  *      error code if action should be taken.
  */
- 
+
 static int job_control(struct tty_struct *tty, struct file *file)
 {
         /* Job control check -- must be done at start and after
@@ -1208,7 +1206,7 @@ static int job_control(struct tty_struct *tty, struct file *file)
         if (file->f_op->write != redirected_tty_write &&
             current->signal->tty == tty) {
                 if (!tty->pgrp)
-                        printk("read_chan: no tty->pgrp!\n");
+                        printk(KERN_ERR "read_chan: no tty->pgrp!\n");
                 else if (task_pgrp(current) != tty->pgrp) {
                         if (is_ignored(SIGTTIN) ||
                             is_current_pgrp_orphaned())
@@ -1220,7 +1218,7 @@ static int job_control(struct tty_struct *tty, struct file *file)
         }
         return 0;
 }
- 
+
 
 /**
  *      read_chan               -       read function for tty
@@ -1236,7 +1234,7 @@ static int job_control(struct tty_struct *tty, struct file *file)
  *
  *      This code must be sure never to sleep through a hangup.
  */
- 
+
 static ssize_t read_chan(struct tty_struct *tty, struct file *file,
                          unsigned char __user *buf, size_t nr)
 {
@@ -1252,14 +1250,14 @@ static ssize_t read_chan(struct tty_struct *tty, struct file *file,
 do_it_again:
 
         if (!tty->read_buf) {
-                printk("n_tty_read_chan: called with read_buf == NULL?!?\n");
+                printk(KERN_ERR "n_tty_read_chan: read_buf == NULL?!?\n");
                 return -EIO;
         }
 
         c = job_control(tty, file);
-        if(c < 0)
+        if (c < 0)
                 return c;
-        
+
         minimum = time = 0;
         timeout = MAX_SCHEDULE_TIMEOUT;
         if (!tty->icanon) {
@@ -1287,8 +1285,7 @@ do_it_again:
         if (file->f_flags & O_NONBLOCK) {
                 if (!mutex_trylock(&tty->atomic_read_lock))
                         return -EAGAIN;
-        }
-        else {
+        } else {
                 if (mutex_lock_interruptible(&tty->atomic_read_lock))
                         return -ERESTARTSYS;
         }
@@ -1314,11 +1311,11 @@ do_it_again:
                    so that any interrupt will set the state back to
                    TASK_RUNNING. */
                 set_current_state(TASK_INTERRUPTIBLE);
-                
+
                 if (((minimum - (b - buf)) < tty->minimum_to_wake) &&
                     ((minimum - (b - buf)) >= 1))
                         tty->minimum_to_wake = (minimum - (b - buf));
-                
+
                 if (!input_available_p(tty, 0)) {
                         if (test_bit(TTY_OTHER_CLOSED, &tty->flags)) {
                                 retval = -EIO;
@@ -1355,7 +1352,7 @@ do_it_again:
                 if (tty->icanon) {
                         /* N.B. avoid overrun if nr == 0 */
                         while (nr && tty->read_cnt) {
-                                int eol;
+                                int eol;
 
                                 eol = test_and_clear_bit(tty->read_tail,
                                                 tty->read_flags);
@@ -1427,7 +1424,7 @@ do_it_again:
         if (size) {
                 retval = size;
                 if (nr)
-                        clear_bit(TTY_PUSH, &tty->flags);
+                        clear_bit(TTY_PUSH, &tty->flags);
         } else if (test_and_clear_bit(TTY_PUSH, &tty->flags))
                  goto do_it_again;
 
@@ -1450,9 +1447,9 @@ do_it_again:
  *
  *      This code must be sure never to sleep through a hangup.
  */
- 
-static ssize_t write_chan(struct tty_struct * tty, struct file * file,
-                          const unsigned char * buf, size_t nr)
+
+static ssize_t write_chan(struct tty_struct *tty, struct file *file,
+                          const unsigned char *buf, size_t nr)
 {
         const unsigned char *b = buf;
         DECLARE_WAITQUEUE(wait, current);
@@ -1542,8 +1539,9 @@ break_out:
  *      recompute the new limits. Possibly set_termios should issue
  *      a read wakeup to fix this bug.
  */
- 
-static unsigned int normal_poll(struct tty_struct * tty, struct file * file, poll_table *wait)
+
+static unsigned int normal_poll(struct tty_struct *tty, struct file *file,
+                                                        poll_table *wait)
 {
         unsigned int mask = 0;