From 3d7474734b220ccbf9997ea484d0bcd4f7ab8549 Mon Sep 17 00:00:00 2001 From: Jack Morgenstein Date: Sun, 19 Feb 2012 21:38:52 +0000 Subject: [PATCH] mlx4_core: Do not map BF area if capability is 0 BF can be disabled in some cases, the capability field, bf_reg_size is set to zero in this case. Don't map the BF area in this case, it would cause failures. In addition, leaving the BF area unmapped also alerts the ETH driver to not use BF. Signed-off-by: Jack Morgenstein Signed-off-by: David S. Miller --- drivers/net/ethernet/mellanox/mlx4/main.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/net/ethernet/mellanox/mlx4/main.c b/drivers/net/ethernet/mellanox/mlx4/main.c index 678558b502fc..9c5fbad513f8 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) - -- 2.20.1