[PATCH] IB/mthca: fix return value of error branch in mthca_init_cq()

[Xiongfeng Wang]

We return 'err' in the error branch, but this variable may be set as
zero by the above code. Fix it by setting 'err'  as a negative value
before we goto the error label.

Reported-by: Hulk Robot <hul...@huawei.com>
Signed-off-by: Xiongfeng Wang <wangxiongfe...@huawei.com>
---
 drivers/infiniband/hw/mthca/mthca_cq.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/infiniband/hw/mthca/mthca_cq.c 
b/drivers/infiniband/hw/mthca/mthca_cq.c
index c3cfea2..98d697b 100644
--- a/drivers/infiniband/hw/mthca/mthca_cq.c
+++ b/drivers/infiniband/hw/mthca/mthca_cq.c
@@ -803,8 +803,10 @@ int mthca_init_cq(struct mthca_dev *dev, int nent,
        }
 
        mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL);
-       if (IS_ERR(mailbox))
+       if (IS_ERR(mailbox)) {
+               err = -ENOMEM;
                goto err_out_arm;
+       }
 
        cq_context = mailbox->buf;
 
@@ -850,6 +852,7 @@ int mthca_init_cq(struct mthca_dev *dev, int nent,
                            cq->cqn & (dev->limits.num_cqs - 1),
                            cq)) {
                spin_unlock_irq(&dev->cq_table.lock);
+               err = -ENOMEM;
                goto err_out_free_mr;
        }
        spin_unlock_irq(&dev->cq_table.lock);
-- 
1.7.12.4