UPSTREAM: clk: rockchip: release io resource when failing to init clk

[firefly-linux-kernel-4.4.55.git] / drivers / tty / tty_buffer.c

diff --git a/drivers/tty/tty_buffer.c b/drivers/tty/tty_buffer.c
index 9a479e61791a2a80cd0ae3fd5c93c6d0873d6998..3cd31e0d4bd9545b5357cda0ffa14373d181e670 100644 (file)
--- a/drivers/tty/tty_buffer.c
+++ b/drivers/tty/tty_buffer.c
@@ -450,7 +450,7 @@ receive_buf(struct tty_struct *tty, struct tty_buffer *head, int count)
                count = disc->ops->receive_buf2(tty, p, f, count);
        else {
                count = min_t(int, count, tty->receive_room);
-               if (count)
+               if (count && disc->ops->receive_buf)
                        disc->ops->receive_buf(tty, p, f, count);
        }
        return count;