Re: [PATCH] RDMA/hns: ZERO_OR_NULL_PTR macro overdetection

[Junxian Huang <huangjunxian6@hisilicon.com>]

On 2025/6/3 9:59, luoqing wrote:
> From: luoqing <luoqing@kylinos.cn>
> 
> sizeof(xx) these variable values' return values cannot be 0.
> For memory allocation requests of non-zero length,
> there is no need to check other return values;
> it is sufficient to only verify that it is not null.
> 
> Signed-off-by: luoqing <luoqing@kylinos.cn>

For future patches, please add RDMA maillist.

Thanks,
Reviewed-by: Junxian Huang <huangjunxian6@hisilicon.com>

> ---
>  drivers/infiniband/hw/hns/hns_roce_hw_v2.c | 6 +++---
>  drivers/infiniband/hw/hns/hns_roce_qp.c    | 4 ++--
>  2 files changed, 5 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
> index 160e8927d364..65884f63fc7c 100644
> --- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
> +++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
> @@ -2613,7 +2613,7 @@ static struct ib_pd *free_mr_init_pd(struct hns_roce_dev *hr_dev)
>  	struct ib_pd *pd;
>  
>  	hr_pd = kzalloc(sizeof(*hr_pd), GFP_KERNEL);
> -	if (ZERO_OR_NULL_PTR(hr_pd))
> +	if (!hr_pd)
>  		return NULL;
>  	pd = &hr_pd->ibpd;
>  	pd->device = ibdev;
> @@ -2644,7 +2644,7 @@ static struct ib_cq *free_mr_init_cq(struct hns_roce_dev *hr_dev)
>  	cq_init_attr.cqe = HNS_ROCE_FREE_MR_USED_CQE_NUM;
>  
>  	hr_cq = kzalloc(sizeof(*hr_cq), GFP_KERNEL);
> -	if (ZERO_OR_NULL_PTR(hr_cq))
> +	if (!hr_cq)
>  		return NULL;
>  
>  	cq = &hr_cq->ib_cq;
> @@ -2677,7 +2677,7 @@ static int free_mr_init_qp(struct hns_roce_dev *hr_dev, struct ib_cq *cq,
>  	int ret;
>  
>  	hr_qp = kzalloc(sizeof(*hr_qp), GFP_KERNEL);
> -	if (ZERO_OR_NULL_PTR(hr_qp))
> +	if (!hr_qp)
>  		return -ENOMEM;
>  
>  	qp = &hr_qp->ibqp;
> diff --git a/drivers/infiniband/hw/hns/hns_roce_qp.c b/drivers/infiniband/hw/hns/hns_roce_qp.c
> index 9f376a2232b0..6ff1b8ce580c 100644
> --- a/drivers/infiniband/hw/hns/hns_roce_qp.c
> +++ b/drivers/infiniband/hw/hns/hns_roce_qp.c
> @@ -1003,14 +1003,14 @@ static int alloc_kernel_wrid(struct hns_roce_dev *hr_dev,
>  	int ret;
>  
>  	sq_wrid = kcalloc(hr_qp->sq.wqe_cnt, sizeof(u64), GFP_KERNEL);
> -	if (ZERO_OR_NULL_PTR(sq_wrid)) {
> +	if (!sq_wrid) {
>  		ibdev_err(ibdev, "failed to alloc SQ wrid.\n");
>  		return -ENOMEM;
>  	}
>  
>  	if (hr_qp->rq.wqe_cnt) {
>  		rq_wrid = kcalloc(hr_qp->rq.wqe_cnt, sizeof(u64), GFP_KERNEL);
> -		if (ZERO_OR_NULL_PTR(rq_wrid)) {
> +		if (!rq_wrid) {
>  			ibdev_err(ibdev, "failed to alloc RQ wrid.\n");
>  			ret = -ENOMEM;
>  			goto err_sq;