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[PATCH 3.16.y-ckt 033/126] net/mlx4_core: Avoid returning success in case of an error flow

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  [PATCH 3.16.y-ckt 033/126] net/mlx4_core: Avoid returning success in case of an error flow Luis Henriques <luis.henriques@canonical.com> - 2016-01-06 11:40 +0100

#1302549 — [PATCH 3.16.y-ckt 033/126] net/mlx4_core: Avoid returning success in case of an error flow

3.16.7-ckt22 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Noa Osherovich <noaos@mellanox.com>

commit d49c2197fd70c37d57982804465268440a33183a upstream.

The err variable wasn't set with the correct error value in some cases.

Fixes: 47605df95398 ('mlx4: Modify proxy/tunnel QP mechanism [..]')
Signed-off-by: Noa Osherovich <noaos@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
[ luis: backported to 3.16: adjusted context ]
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/net/ethernet/mellanox/mlx4/main.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx4/main.c b/drivers/net/ethernet/mellanox/mlx4/main.c
index 3bdc11e44ec3..a0c2155c47e8 100644
--- a/drivers/net/ethernet/mellanox/mlx4/main.c
+++ b/drivers/net/ethernet/mellanox/mlx4/main.c
@@ -682,9 +682,10 @@ static int mlx4_slave_cap(struct mlx4_dev *dev)
 		dev->caps.qp1_proxy[i - 1] = func_cap.qp1_proxy_qpn;
 		dev->caps.port_mask[i] = dev->caps.port_type[i];
 		dev->caps.phys_port_id[i] = func_cap.phys_port_id;
-		if (mlx4_get_slave_pkey_gid_tbl_len(dev, i,
-						    &dev->caps.gid_table_len[i],
-						    &dev->caps.pkey_table_len[i]))
+		err = mlx4_get_slave_pkey_gid_tbl_len(dev, i,
+						      &dev->caps.gid_table_len[i],
+						      &dev->caps.pkey_table_len[i]);
+		if (err)
 			goto err_mem;
 	}
 
@@ -694,6 +695,7 @@ static int mlx4_slave_cap(struct mlx4_dev *dev)
 		mlx4_err(dev, "HCA reported UAR region size of 0x%x bigger than PCI resource 2 size of 0x%llx, aborting\n",
 			 dev->caps.uar_page_size * dev->caps.num_uars,
 			 (unsigned long long) pci_resource_len(dev->pdev, 2));
+		err = -ENOMEM;
 		goto err_mem;
 	}
 
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