Re: [PATCH v2][next] RDMA/hns: Fix uninitialized variable bug

[liweihang]

On 2020/3/28 10:32, 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 0.
> 
> 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@xxxxxxxxxxxxxx>
> ---
> Changes in v2:
>  - Set ret to 0 instead of -ENODEV. Thanks Weihang Li, for the feedback.
> 
>  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..263338b90d7a 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 = 0;
>  
>  	if (index->inited & HEM_INDEX_L0) {
>  		ret = hr_dev->hw->set_hem(hr_dev, table, obj, 0);
> 

Acked-by: Weihang Li <liweihang@xxxxxxxxxx>