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SubjectRe: [PATCH][next] RDMA/hns: Fix uninitialized variable bug
Date
On 2020/3/28 3:28, Gustavo A. R. Silva wrote:
> There is a potential execution path in which variable *ret* is returned
> without being properly initialized, previously.
>
> Fix this by initializing variable *ret* to -ENODEV.
>
> Addresses-Coverity-ID: 1491917 ("Uninitialized scalar variable")
> Fixes: 2f49de21f3e9 ("RDMA/hns: Optimize mhop get flow for multi-hop addressing")
> Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
> ---
> drivers/infiniband/hw/hns/hns_roce_hem.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/infiniband/hw/hns/hns_roce_hem.c b/drivers/infiniband/hw/hns/hns_roce_hem.c
> index c96378718f88..3fd8100c2b56 100644
> --- a/drivers/infiniband/hw/hns/hns_roce_hem.c
> +++ b/drivers/infiniband/hw/hns/hns_roce_hem.c
> @@ -603,7 +603,7 @@ static int set_mhop_hem(struct hns_roce_dev *hr_dev,
> {
> struct ib_device *ibdev = &hr_dev->ib_dev;
> int step_idx;
> - int ret;
> + int ret = -ENODEV;
>
> if (index->inited & HEM_INDEX_L0) {
> ret = hr_dev->hw->set_hem(hr_dev, table, obj, 0);
>

Hi Gustavo,

Thanks for your modification. But I check the code and I think "ret"
should be initialized to 0, which means no need to set hem and it is
not an error.

Weihang

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