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n_tty: Remove unused echo_overrun field

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The echo_overrun field is only assigned and never tested; remove it.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Peter Hurley 2013-06-15 10:04:21 -04:00 committed by Greg Kroah-Hartman
parent 9114fe8ccf
commit ae56f33041
1 changed files with 1 additions and 7 deletions
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8
drivers/tty/n_tty.c
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@ -96,7 +96,6 @@ struct n_tty_data {
/* must hold exclusive termios_rwsem to reset these */
unsigned char lnext:1, erasing:1, raw:1, real_raw:1, icanon:1;
unsigned char echo_overrun:1;
/* shared by producer and consumer */
char *read_buf;
@ -326,7 +325,7 @@ static void reset_buffer_flags(struct n_tty_data *ldata)
ldata->read_head = ldata->canon_head = ldata->read_tail = 0;
mutex_lock(&ldata->echo_lock);
ldata->echo_pos = ldata->echo_cnt = ldata->echo_overrun = 0;
ldata->echo_pos = ldata->echo_cnt = 0;
mutex_unlock(&ldata->echo_lock);
ldata->erasing = 0;
@ -782,14 +781,11 @@ static void process_echoes(struct tty_struct *tty)
if (nr == 0) {
ldata->echo_pos = 0;
ldata->echo_cnt = 0;
ldata->echo_overrun = 0;
} else {
int num_processed = ldata->echo_cnt - nr;
ldata->echo_pos += num_processed;
ldata->echo_pos &= N_TTY_BUF_SIZE - 1;
ldata->echo_cnt = nr;
if (num_processed > 0)
ldata->echo_overrun = 0;
}
mutex_unlock(&ldata->echo_lock);
@ -835,8 +831,6 @@ static void add_echo_byte(unsigned char c, struct n_tty_data *ldata)
ldata->echo_pos++;
}
ldata->echo_pos &= N_TTY_BUF_SIZE - 1;
ldata->echo_overrun = 1;
} else {
new_byte_pos = ldata->echo_pos + ldata->echo_cnt;
new_byte_pos &= N_TTY_BUF_SIZE - 1;