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>

1 files changed, 56 insertions, 47 deletions

diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c
index f2e6bdb319cf..8686124b1309 100644
--- 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)
 {