[PATCH] mlx4: corretly check failed allocation

[Insu Yun]

When allocation fails, mlx4_alloc_cmd_mailbox returns -ENOMEM.
Since there is no case that mlx4_alloc_cmd_mailbox returns NULL,
it needs to be checked by IS_ERR, not IS_ERR_OR_NULL

Signed-off-by: Insu Yun <wuninsu@xxxxxxxxx>
---
 drivers/net/ethernet/mellanox/mlx4/mr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlx4/mr.c b/drivers/net/ethernet/mellanox/mlx4/mr.c
index 78f51e1..9319519 100644
--- a/drivers/net/ethernet/mellanox/mlx4/mr.c
+++ b/drivers/net/ethernet/mellanox/mlx4/mr.c
@@ -318,7 +318,7 @@ int mlx4_mr_hw_get_mpt(struct mlx4_dev *dev, struct mlx4_mr *mmr,
 				key, NULL);
 	} else {
 		mailbox = mlx4_alloc_cmd_mailbox(dev);
-		if (IS_ERR_OR_NULL(mailbox))
+		if (IS_ERR(mailbox))
 			return PTR_ERR(mailbox);
 
 		err = mlx4_cmd_box(dev, 0, mailbox->dma, key,
-- 
1.9.1

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