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RDMA/hns: Set desc_dma_addr for zero when free cmq desc

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In order to avoid illegal use for desc_dma_addr of ring,
it needs to set it zero when free cmq desc.

Signed-off-by: Lijun Ou <oulijun@huawei.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
oulijun 2018-05-04 10:57:10 +08:00 committed by Doug Ledford
parent 778cc5a8b7
commit 90e7a4d506
1 changed files with 2 additions and 0 deletions
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2
drivers/infiniband/hw/hns/hns_roce_hw_v2.c
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@ -617,6 +617,8 @@ static void hns_roce_free_cmq_desc(struct hns_roce_dev *hr_dev,
dma_unmap_single(hr_dev->dev, ring->desc_dma_addr,
ring->desc_num * sizeof(struct hns_roce_cmq_desc),
DMA_BIDIRECTIONAL);
ring->desc_dma_addr = 0;
kfree(ring->desc);
}