diff options
| -rw-r--r-- | drivers/tty/serial/sh-sci.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c index ffcbf6eaf5f9..d8b73e791a55 100644 --- a/drivers/tty/serial/sh-sci.c +++ b/drivers/tty/serial/sh-sci.c @@ -1467,10 +1467,11 @@ static void work_fn_rx(struct work_struct *work) dev_dbg(port->dev, "Read %u bytes with cookie %d\n", read, s->active_rx); - count = sci_dma_rx_push(s, s->rx_buf[new], read); - - if (count) - tty_flip_buffer_push(&port->state->port); + if (read) { + count = sci_dma_rx_push(s, s->rx_buf[new], read); + if (count) + tty_flip_buffer_push(&port->state->port); + } spin_unlock_irqrestore(&port->lock, flags); |