1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c
index a97f1ae11f7..342e12fb1c2 100644
--- a/drivers/serial/8250.c
+++ b/drivers/serial/8250.c
@@ -1885,7 +1885,7 @@ static int serial8250_startup(struct uart_port *port)
                  * the interrupt is enabled.  Delays are necessary to
                  * allow register changes to become visible.
                  */
-                spin_lock(&up->port.lock);
+                spin_lock_irqsave(&up->port.lock, flags);
                 if (up->port.flags & UPF_SHARE_IRQ)
                         disable_irq_nosync(up->port.irq);
 
@@ -1901,7 +1901,7 @@ static int serial8250_startup(struct uart_port *port)
 
                 if (up->port.flags & UPF_SHARE_IRQ)
                         enable_irq(up->port.irq);
-                spin_unlock(&up->port.lock);
+                spin_unlock_irqrestore(&up->port.lock, flags);
 
                 /*
                  * If the interrupt is not reasserted, setup a timer to