n_tty: Factor ISTRIP and IUCLC receive_buf into separate fn
Convert to modal receive_buf processing; factor char receive
processing for unusual termios settings out of normal per-char
i/o path.
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 8686124..59c73ee 100644
--- a/drivers/tty/n_tty.c
+++ b/drivers/tty/n_tty.c
@@ -1418,16 +1418,6 @@
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
@@ -1585,7 +1575,34 @@
static void
n_tty_receive_buf_standard(struct tty_struct *tty, const unsigned char *cp,
- char *fp, int count)
+ char *fp, int count)
+{
+ struct n_tty_data *ldata = tty->disc_data;
+ char flag = TTY_NORMAL;
+
+ while (count--) {
+ if (fp)
+ flag = *fp++;
+ if (likely(flag == TTY_NORMAL)) {
+ unsigned char c = *cp++;
+
+ 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;
+ }
+ n_tty_receive_char(tty, c);
+ } else
+ n_tty_receive_char_flagged(tty, *cp++, flag);
+ }
+}
+
+static void
+n_tty_receive_buf_fast(struct tty_struct *tty, const unsigned char *cp,
+ char *fp, int count)
{
char flag = TTY_NORMAL;
@@ -1612,7 +1629,10 @@
else if (tty->closing && !L_EXTPROC(tty))
n_tty_receive_buf_closing(tty, cp, fp, count);
else {
- n_tty_receive_buf_standard(tty, cp, fp, count);
+ if (!preops)
+ n_tty_receive_buf_fast(tty, cp, fp, count);
+ else
+ n_tty_receive_buf_standard(tty, cp, fp, count);
flush_echoes(tty);
if (tty->ops->flush_chars)