n_tty: Split n_tty_receive_char()

Factor 'special' per-char processing into standalone fn,
n_tty_receive_char_special(), which handles processing for chars
marked in the char_map.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c
index f2e6bdb..8686124 100644 (file)
--- a/drivers/tty/n_tty.c
+++ b/drivers/tty/n_tty.c
@@ -1255,57 +1255,12 @@ n_tty_receive_signal_char(struct tty_struct *tty, int signal, unsigned char c)
  *             otherwise, publishes read_head via put_tty_queue()
  */
 
-static inline void n_tty_receive_char(struct tty_struct *tty, unsigned char c)
+static void
+n_tty_receive_char_special(struct tty_struct *tty, unsigned char c)
 {
        struct n_tty_data *ldata = tty->disc_data;
        int parmrk;
 
-       if (I_ISTRIP(tty))
-               c &= 0x7f;
-       if (I_IUCLC(tty) && L_IEXTEN(tty))
-               c = tolower(c);
-
-       if (L_EXTPROC(tty)) {
-               put_tty_queue(c, ldata);
-               return;
-       }
-
-       /*
-        * If the previous character was LNEXT, or we know that this
-        * character is not one of the characters that we'll have to
-        * handle specially, do shortcut processing to speed things
-        * up.
-        */
-       if (!test_bit(c, ldata->char_map) || ldata->lnext) {
-               ldata->lnext = 0;
-
-               if (tty->stopped && !tty->flow_stopped && I_IXON(tty) &&
-                   I_IXANY(tty)) {
-                       start_tty(tty);
-                       process_echoes(tty);
-               }
-
-               parmrk = (c == (unsigned char) '\377' && I_PARMRK(tty)) ? 1 : 0;
-               if (read_cnt(ldata) >= (N_TTY_BUF_SIZE - parmrk - 1)) {
-                       /* beep if no space */
-                       if (L_ECHO(tty))
-                               process_output('\a', tty);
-                       return;
-               }
-               if (L_ECHO(tty)) {
-                       finish_erasing(ldata);
-                       /* Record the column of first canon char. */
-                       if (ldata->canon_head == ldata->read_head)
-                               echo_set_canon_col(ldata);
-                       echo_char(c, tty);
-                       commit_echoes(tty);
-               }
-               if (parmrk)
-                       put_tty_queue(c, ldata);
-               put_tty_queue(c, ldata);
-               return;
-       }
-
        if (I_IXON(tty)) {
                if (c == START_CHAR(tty)) {
                        start_tty(tty);
@@ -1458,6 +1413,60 @@ handle_newline:
        put_tty_queue(c, ldata);
 }
 
+static inline void n_tty_receive_char(struct tty_struct *tty, unsigned char c)
+{
+       struct n_tty_data *ldata = tty->disc_data;
+       int parmrk;
+
+       if (I_ISTRIP(tty))
+               c &= 0x7f;
+       if (I_IUCLC(tty) && L_IEXTEN(tty))
+               c = tolower(c);
+
+       if (L_EXTPROC(tty)) {
+               put_tty_queue(c, ldata);
+               return;
+       }
+
+       /*
+        * If the previous character was LNEXT, or we know that this
+        * character is not one of the characters that we'll have to
+        * handle specially, do shortcut processing to speed things
+        * up.
+        */
+       if (!test_bit(c, ldata->char_map) || ldata->lnext) {
+               ldata->lnext = 0;
+
+               if (tty->stopped && !tty->flow_stopped && I_IXON(tty) &&
+                   I_IXANY(tty)) {
+                       start_tty(tty);
+                       process_echoes(tty);
+               }
+
+               parmrk = (c == (unsigned char) '\377' && I_PARMRK(tty)) ? 1 : 0;
+               if (read_cnt(ldata) >= (N_TTY_BUF_SIZE - parmrk - 1)) {
+                       /* beep if no space */
+                       if (L_ECHO(tty))
+                               process_output('\a', tty);
+                       return;
+               }
+               if (L_ECHO(tty)) {
+                       finish_erasing(ldata);
+                       /* Record the column of first canon char. */
+                       if (ldata->canon_head == ldata->read_head)
+                               echo_set_canon_col(ldata);
+                       echo_char(c, tty);
+                       commit_echoes(tty);
+               }
+               if (parmrk)
+                       put_tty_queue(c, ldata);
+               put_tty_queue(c, ldata);
+               return;
+       }
+
+       n_tty_receive_char_special(tty, c);
+}
+
 static inline void
 n_tty_receive_char_closing(struct tty_struct *tty, unsigned char c)
 {