1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/infiniband/hw/mlx4/main.c b/drivers/infiniband/hw/mlx4/main.c
index fe2088cfa6ee..cc05579ebce7 100644
--- a/drivers/infiniband/hw/mlx4/main.c
+++ b/drivers/infiniband/hw/mlx4/main.c
@@ -423,6 +423,7 @@ static int mlx4_ib_modify_device(struct ib_device *ibdev, int mask,
                                  struct ib_device_modify *props)
 {
         struct mlx4_cmd_mailbox *mailbox;
+        unsigned long flags;
 
         if (mask & ~IB_DEVICE_MODIFY_NODE_DESC)
                 return -EOPNOTSUPP;
@@ -430,9 +431,9 @@ static int mlx4_ib_modify_device(struct ib_device *ibdev, int mask,
         if (!(mask & IB_DEVICE_MODIFY_NODE_DESC))
                 return 0;
 
-        spin_lock(&to_mdev(ibdev)->sm_lock);
+        spin_lock_irqsave(&to_mdev(ibdev)->sm_lock, flags);
         memcpy(ibdev->node_desc, props->node_desc, 64);
-        spin_unlock(&to_mdev(ibdev)->sm_lock);
+        spin_unlock_irqrestore(&to_mdev(ibdev)->sm_lock, flags);
 
         /*
          * If possible, pass node desc to FW, so it can generate