n_tty: Unthrottle tty when flushing read buffer

When the tty input buffer is full and thereby throttled,
flushing/resetting the read buffer should unthrottle to allow more
data to be received.

Signed-off-by: Karthik Manamcheri <Karthik.Manamcheri@ni.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c
index 19083efa2314..d5cea3bb01ea 100644
--- a/drivers/tty/n_tty.c
+++ b/drivers/tty/n_tty.c
@@ -229,6 +229,8 @@ static void reset_buffer_flags(struct tty_struct *tty)
         ldata->canon_head = ldata->canon_data = ldata->erasing = 0;
         bitmap_zero(ldata->read_flags, N_TTY_BUF_SIZE);
         n_tty_set_room(tty);
+
+        check_unthrottle(tty);
 }
 
 /**