1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/tty/serial/sprd_serial.c b/drivers/tty/serial/sprd_serial.c
index 594b63331ef4..bca975f5093b 100644
--- a/drivers/tty/serial/sprd_serial.c
+++ b/drivers/tty/serial/sprd_serial.c
@@ -293,8 +293,10 @@ static irqreturn_t sprd_handle_irq(int irq, void *dev_id)
 
         ims = serial_in(port, SPRD_IMSR);
 
-        if (!ims)
+        if (!ims) {
+                spin_unlock(&port->lock);
                 return IRQ_NONE;
+        }
 
         serial_out(port, SPRD_ICLR, ~0);