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n_tty: invert TTY_NORMAL condition in n_tty_receive_buf_standard

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Handle !TTY_NORMAL as a short path and 'continue' the loop. Do the rest as
a normal code flow. This decreases the indentation level by one and
makes the code flow more understandable.

IOW, we avoid
  if (cond) {
    LONG CODE;
  } else
    single_line();
by
  if (!cond) {
    single_line();
    continue;
  }
  LONG CODE;

While at it, invert also the 'if (!test_bit) A else B' into 'if
(test_bit) B else A'.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20210505091928.22010-10-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jiri Slaby
2021-05-05 11:19:02 +02:00
committed by Greg Kroah-Hartman
parent 3a7d530a0c
commit e8f2a139ff
1 changed files with 17 additions and 14 deletions
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31
drivers/tty/n_tty.c
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@@ -1541,21 +1541,24 @@ static void n_tty_receive_buf_standard(struct tty_struct *tty,
continue;
}
if (likely(flag == TTY_NORMAL)) {
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);
continue;
}
if (!test_bit(c, ldata->char_map))
n_tty_receive_char(tty, c);
else
n_tty_receive_char_special(tty, c);
} else
if (unlikely(flag != TTY_NORMAL)) {
n_tty_receive_char_flagged(tty, c, flag);
continue;
}
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);
continue;
}
if (test_bit(c, ldata->char_map))
n_tty_receive_char_special(tty, c);
else
n_tty_receive_char(tty, c);
}
}