1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/tty/serial/nwpserial.c b/drivers/tty/serial/nwpserial.c
index 549c70a2a63e..693bc6c2561e 100644
--- a/drivers/tty/serial/nwpserial.c
+++ b/drivers/tty/serial/nwpserial.c
@@ -149,7 +149,10 @@ static irqreturn_t nwpserial_interrupt(int irq, void *dev_id)
                         tty_insert_flip_char(port, ch, TTY_NORMAL);
         } while (dcr_read(up->dcr_host, UART_LSR) & UART_LSR_DR);
 
+        spin_unlock(&up->port.lock);
         tty_flip_buffer_push(port);
+        spin_lock(&up->port.lock);
+
         ret = IRQ_HANDLED;
 
         /* clear interrupt */