1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/net/mlx4/pd.c b/drivers/net/mlx4/pd.c
index 3a93c5f0f7a..aa616892d09 100644
--- a/drivers/net/mlx4/pd.c
+++ b/drivers/net/mlx4/pd.c
@@ -91,6 +91,13 @@ EXPORT_SYMBOL_GPL(mlx4_uar_free);
 
 int mlx4_init_uar_table(struct mlx4_dev *dev)
 {
+        if (dev->caps.num_uars <= 128) {
+                mlx4_err(dev, "Only %d UAR pages (need more than 128)\n",
+                         dev->caps.num_uars);
+                mlx4_err(dev, "Increase firmware log2_uar_bar_megabytes?\n");
+                return -ENODEV;
+        }
+
         return mlx4_bitmap_init(&mlx4_priv(dev)->uar_table.bitmap,
                                 dev->caps.num_uars, dev->caps.num_uars - 1,
                                 max(128, dev->caps.reserved_uars));