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n_tty: Eliminate char tests from IXANY restart test

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Relocate the IXANY restart tty test to code paths where the
the received char is not START_CHAR, STOP_CHAR, INTR_CHAR,
QUIT_CHAR or SUSP_CHAR.

Fixes the condition when ISIG if off and one of INTR_CHAR,
QUIT_CHAR or SUSP_CHAR does not restart i/o.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Peter Hurley 2013-07-24 08:29:50 -04:00 committed by Greg Kroah-Hartman
parent 7d88d637a3
commit 855df3c089
1 changed files with 12 additions and 7 deletions
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19
drivers/tty/n_tty.c
View file

@ -1270,13 +1270,6 @@ static inline void n_tty_receive_char(struct tty_struct *tty, unsigned char c)
return;
}
if (tty->stopped && !tty->flow_stopped && I_IXON(tty) &&
I_IXANY(tty) && c != START_CHAR(tty) && c != STOP_CHAR(tty) &&
c != INTR_CHAR(tty) && c != QUIT_CHAR(tty) && c != SUSP_CHAR(tty)) {
start_tty(tty);
process_echoes(tty);
}
/*
* If the previous character was LNEXT, or we know that this
* character is not one of the characters that we'll have to
@ -1285,6 +1278,13 @@ static inline void n_tty_receive_char(struct tty_struct *tty, unsigned char c)
*/
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 */
@ -1331,6 +1331,11 @@ static inline void n_tty_receive_char(struct tty_struct *tty, unsigned char c)
}
}
if (tty->stopped && !tty->flow_stopped && I_IXON(tty) && I_IXANY(tty)) {
start_tty(tty);
process_echoes(tty);
}
if (c == '\r') {
if (I_IGNCR(tty))
return;