1 files changed, 15 insertions, 18 deletions

diff --git a/drivers/char/n_tty.c b/drivers/char/n_tty.c
index edba5a35bf21..09103b3d8f05 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;