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

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[ Upstream commit 6830ff853a5764c75e56750d59d0bbb6b26f1835 ]

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.

Fixes: 74c2174e7b ("IB uverbs: add mthca user CQ support")
Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Link: https://lore.kernel.org/r/1605837422-42724-1-git-send-email-wangxiongfeng2@huawei.com
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Xiongfeng Wang <wangxiongfeng2@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Xiongfeng Wang
2020-11-20 09:57:02 +08:00
committed by Greg Kroah-Hartman
parent c09619911b
commit f341a769f3
1 changed files with 6 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/infiniband/hw/mthca/mthca_cq.c
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@@ -808,8 +808,10 @@ int mthca_init_cq(struct mthca_dev *dev, int nent,
} }
mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL); mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL);
if (IS_ERR(mailbox)) if (IS_ERR(mailbox)) {
err = PTR_ERR(mailbox);
goto err_out_arm; goto err_out_arm;
}
cq_context = mailbox->buf; cq_context = mailbox->buf;
@@ -851,9 +853,9 @@ int mthca_init_cq(struct mthca_dev *dev, int nent,
} }
spin_lock_irq(&dev->cq_table.lock); spin_lock_irq(&dev->cq_table.lock);
if (mthca_array_set(&dev->cq_table.cq, err = mthca_array_set(&dev->cq_table.cq,
cq->cqn & (dev->limits.num_cqs - 1), cq->cqn & (dev->limits.num_cqs - 1), cq);
cq)) { if (err) {
spin_unlock_irq(&dev->cq_table.lock); spin_unlock_irq(&dev->cq_table.lock);
goto err_out_free_mr; goto err_out_free_mr;
} }