diff options
| -rw-r--r-- | drivers/tty/tty_buffer.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/drivers/tty/tty_buffer.c b/drivers/tty/tty_buffer.c index 6c9b7cd6778a..4f02f9ce05c5 100644 --- a/drivers/tty/tty_buffer.c +++ b/drivers/tty/tty_buffer.c @@ -114,11 +114,14 @@ static void __tty_buffer_flush(struct tty_struct *tty) { struct tty_buffer *thead; - while ((thead = tty->buf.head) != NULL) { - tty->buf.head = thead->next; - tty_buffer_free(tty, thead); + if (tty->buf.head == NULL) + return; + while ((thead = tty->buf.head->next) != NULL) { + tty_buffer_free(tty, tty->buf.head); + tty->buf.head = thead; } - tty->buf.tail = NULL; + WARN_ON(tty->buf.head != tty->buf.tail); + tty->buf.head->read = tty->buf.head->commit; } /** |