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[for-next,6/9] RDMA/hns: Add return statement when checking error in hns_roce_v1_mr_free_work_fn

Message ID 1506574654-56699-7-git-send-email-xavier.huwei@huawei.com (mailing list archive)
State Superseded
Headers show

Commit Message

Wei Hu (Xavier) Sept. 28, 2017, 4:57 a.m. UTC 
After the loop in hns_roce_v1_mr_free_work_fn function, it is possible that
the local variable named hr_qp is NULL, the operation "hr_qp->qpn" will
result in the exception. As a result, we add return statement when checking
error.

This patch fixes the smatch error as below:
drivers/infiniband/hw/hns/hns_roce_hw_v1.c:1009 hns_roce_v1_mr_free_work_fn()
error: we previously assumed 'hr_qp' could be null

Signed-off-by: Wei Hu (Xavier) <xavier.huwei@huawei.com>
Signed-off-by: Lijun Ou <oulijun@huawei.com>
Signed-off-by: Shaobo Xu <xushaobo2@huawei.com>
---
 drivers/infiniband/hw/hns/hns_roce_hw_v1.c | 5 +++++
 1 file changed, 5 insertions(+)
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Patch

diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v1.c b/drivers/infiniband/hw/hns/hns_roce_hw_v1.c
index 3496f39..c08822b 100644
--- a/drivers/infiniband/hw/hns/hns_roce_hw_v1.c
+++ b/drivers/infiniband/hw/hns/hns_roce_hw_v1.c
@@ -1004,6 +1004,11 @@  static void hns_roce_v1_mr_free_work_fn(struct work_struct *work)
 		}
 	}
 
+	if (!ne) {
+		dev_err(dev, "Reseved loop qp is absent!\n");
+		goto free_work;
+	}
+
 	do {
 		ret = hns_roce_v1_poll_cq(&mr_free_cq->ib_cq, ne, wc);
 		if (ret < 0) {