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-rw-r--r--drivers/char/n_tty.c33
1 files changed, 15 insertions, 18 deletions
diff --git a/drivers/char/n_tty.c b/drivers/char/n_tty.c
index edba5a35bf2..09103b3d8f0 100644
--- a/drivers/char/n_tty.c
+++ b/drivers/char/n_tty.c
@@ -770,10 +770,8 @@ send_signal:
}
if (c == '\n') {
if (L_ECHO(tty) || L_ECHONL(tty)) {
- if (tty->read_cnt >= N_TTY_BUF_SIZE-1) {
+ if (tty->read_cnt >= N_TTY_BUF_SIZE-1)
put_char('\a', tty);
- return;
- }
opost('\n', tty);
}
goto handle_newline;
@@ -790,10 +788,8 @@ send_signal:
* XXX are EOL_CHAR and EOL2_CHAR echoed?!?
*/
if (L_ECHO(tty)) {
- if (tty->read_cnt >= N_TTY_BUF_SIZE-1) {
+ if (tty->read_cnt >= N_TTY_BUF_SIZE-1)
put_char('\a', tty);
- return;
- }
/* Record the column of first canon char. */
if (tty->canon_head == tty->read_head)
tty->canon_column = tty->column;
@@ -862,12 +858,9 @@ static int n_tty_receive_room(struct tty_struct *tty)
* that erase characters will be handled. Other excess
* characters will be beeped.
*/
- if (tty->icanon && !tty->canon_data)
- return N_TTY_BUF_SIZE;
-
- if (left > 0)
- return left;
- return 0;
+ if (left <= 0)
+ left = tty->icanon && !tty->canon_data;
+ return left;
}
/**
@@ -1473,13 +1466,17 @@ static ssize_t write_chan(struct tty_struct * tty, struct file * file,
if (tty->driver->flush_chars)
tty->driver->flush_chars(tty);
} else {
- c = tty->driver->write(tty, b, nr);
- if (c < 0) {
- retval = c;
- goto break_out;
+ while (nr > 0) {
+ c = tty->driver->write(tty, b, nr);
+ if (c < 0) {
+ retval = c;
+ goto break_out;
+ }
+ if (!c)
+ break;
+ b += c;
+ nr -= c;
}
- b += c;
- nr -= c;
}
if (!nr)
break;