1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c
index d4104a3bbe87..d3ca7d32abe0 100644
--- a/drivers/serial/8250.c
+++ b/drivers/serial/8250.c
@@ -2969,6 +2969,9 @@ static int __init serial8250_init(void)
                 "%d ports, IRQ sharing %sabled\n", nr_uarts,
                 share_irqs ? "en" : "dis");
 
+        for (i = 0; i < NR_IRQS; i++)
+                spin_lock_init(&irq_lists[i].lock);
+
 #ifdef CONFIG_SPARC
         ret = sunserial_register_minors(&serial8250_reg, UART_NR);
 #else