2 files changed, 24 insertions, 5 deletions

diff --git a/drivers/infiniband/hw/mlx4/main.c b/drivers/infiniband/hw/mlx4/main.c
index 62e8cd6f0371..ac6951d99336 100644
--- a/drivers/infiniband/hw/mlx4/main.c
+++ b/drivers/infiniband/hw/mlx4/main.c
@@ -272,14 +272,32 @@ out:
 static int mlx4_ib_modify_device(struct ib_device *ibdev, int mask,
                                  struct ib_device_modify *props)
 {
+        struct mlx4_cmd_mailbox *mailbox;
+
         if (mask & ~IB_DEVICE_MODIFY_NODE_DESC)
                 return -EOPNOTSUPP;
 
-        if (mask & IB_DEVICE_MODIFY_NODE_DESC) {
-                spin_lock(&to_mdev(ibdev)->sm_lock);
-                memcpy(ibdev->node_desc, props->node_desc, 64);
-                spin_unlock(&to_mdev(ibdev)->sm_lock);
-        }
+        if (!(mask & IB_DEVICE_MODIFY_NODE_DESC))
+                return 0;
+
+        spin_lock(&to_mdev(ibdev)->sm_lock);
+        memcpy(ibdev->node_desc, props->node_desc, 64);
+        spin_unlock(&to_mdev(ibdev)->sm_lock);
+
+        /*
+         * If possible, pass node desc to FW, so it can generate
+         * a 144 trap.  If cmd fails, just ignore.
+         */
+        mailbox = mlx4_alloc_cmd_mailbox(to_mdev(ibdev)->dev);
+        if (IS_ERR(mailbox))
+                return 0;
+
+        memset(mailbox->buf, 0, 256);
+        memcpy(mailbox->buf, props->node_desc, 64);
+        mlx4_cmd(to_mdev(ibdev)->dev, mailbox->dma, 1, 0,
+                 MLX4_CMD_SET_NODE, MLX4_CMD_TIME_CLASS_A);
+
+        mlx4_free_cmd_mailbox(to_mdev(ibdev)->dev, mailbox);
 
         return 0;
 }
diff --git a/include/linux/mlx4/cmd.h b/include/linux/mlx4/cmd.h
index 0f82293a82ed..2731266e73a7 100644
--- a/include/linux/mlx4/cmd.h
+++ b/include/linux/mlx4/cmd.h
@@ -57,6 +57,7 @@ enum {
         MLX4_CMD_QUERY_PORT      = 0x43,
         MLX4_CMD_SENSE_PORT      = 0x4d,
         MLX4_CMD_SET_PORT        = 0xc,
+        MLX4_CMD_SET_NODE        = 0x5a,
         MLX4_CMD_ACCESS_DDR      = 0x2e,
         MLX4_CMD_MAP_ICM         = 0xffa,
         MLX4_CMD_UNMAP_ICM       = 0xff9,