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-rw-r--r--drivers/net/ethernet/mellanox/mlx4/main.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx4/main.c b/drivers/net/ethernet/mellanox/mlx4/main.c
index 678558b502f..9c5fbad513f 100644
--- a/drivers/net/ethernet/mellanox/mlx4/main.c
+++ b/drivers/net/ethernet/mellanox/mlx4/main.c
@@ -986,6 +986,9 @@ static int map_bf_area(struct mlx4_dev *dev)
resource_size_t bf_len;
int err = 0;
+ if (!dev->caps.bf_reg_size)
+ return -ENXIO;
+
bf_start = pci_resource_start(dev->pdev, 2) +
(dev->caps.num_uars << PAGE_SHIFT);
bf_len = pci_resource_len(dev->pdev, 2) -