Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1741316

Re: [PATCH for-next 3/9] RDMA/hns: Add return statement when kzalloc return NULL in hns_roce_v1_recreate_lp_qp

Show all headers | View raw

[Multipart message — attachments visible in raw view] - view raw

On Thu, Sep 28, 2017 at 12:57:28PM +0800, Wei Hu (Xavier) wrote:
> From: Lijun Ou <oulijun@huawei.com>
>
> When lp_qp_work is NULL, it should be returned ENOMEM. This patch
> mainly fixes it.
>
> Ihis patch fixes the smatch error as below:
> drivers/infiniband/hw/hns/hns_roce_hw_v1.c:918 hns_roce_v1_recreate_lp_qp()
> error: potential null dereference 'lp_qp_work'.  (kzalloc returns null)
>
> Signed-off-by: Lijun Ou <oulijun@huawei.com>
> Signed-off-by: Wei Hu (Xavier) <xavier.huwei@huawei.com>
> Signed-off-by: Shaobo Xu <xushaobo2@huawei.com>
> ---
>  drivers/infiniband/hw/hns/hns_roce_hw_v1.c | 2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v1.c b/drivers/infiniband/hw/hns/hns_roce_hw_v1.c
> index 95f5c88..1071fa2 100644
> --- a/drivers/infiniband/hw/hns/hns_roce_hw_v1.c
> +++ b/drivers/infiniband/hw/hns/hns_roce_hw_v1.c
> @@ -912,6 +912,8 @@ static int hns_roce_v1_recreate_lp_qp(struct hns_roce_dev *hr_dev)
>
>  	lp_qp_work = kzalloc(sizeof(struct hns_roce_recreate_lp_qp_work),
>  			     GFP_KERNEL);
> +	if (!lp_qp_work)
> +		return -ENOMEM;
>

You will treat this error in the same was as you will treat timeout,
which is wrong.

1656          */
1657         if (hr_dev->hw->dereg_mr && hns_roce_v1_recreate_lp_qp(hr_dev))
1658                 dev_warn(&hr_dev->pdev->dev, "recreate lp qp timeout!\n");
1659
1660         p = (u32 *)(&addr[0]);


>  	INIT_WORK(&(lp_qp_work->work), hns_roce_v1_recreate_lp_qp_work_fn);
>
> --
> 1.9.1
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-rdma" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

[PATCH for-next 3/9] RDMA/hns: Add return statement when kzalloc return NULL in hns_roce_v1_recreate_lp_qp "Wei Hu (Xavier)" <xavier.huwei@huawei.com> - 2017-09-28 06:40 +0200
  Re: [PATCH for-next 3/9] RDMA/hns: Add return statement when kzalloc  return NULL in hns_roce_v1_recreate_lp_qp Leon Romanovsky <leon@kernel.org> - 2017-09-28 11:20 +0200
    Re: [PATCH for-next 3/9] RDMA/hns: Add return statement when kzalloc  return NULL in hns_roce_v1_recreate_lp_qp "Wei Hu (Xavier)" <xavier.huwei@huawei.com> - 2017-09-28 14:00 +0200
      Re: [PATCH for-next 3/9] RDMA/hns: Add return statement when kzalloc  return NULL in hns_roce_v1_recreate_lp_qp Leon Romanovsky <leon@kernel.org> - 2017-09-28 15:00 +0200
        Re: [PATCH for-next 3/9] RDMA/hns: Add return statement when kzalloc  return NULL in hns_roce_v1_recreate_lp_qp "Wei Hu (Xavier)" <xavier.huwei@huawei.com> - 2017-09-29 08:10 +0200
          Re: [PATCH for-next 3/9] RDMA/hns: Add return statement when kzalloc  return NULL in hns_roce_v1_recreate_lp_qp Leon Romanovsky <leon@kernel.org> - 2017-09-29 12:30 +0200
            Re: [PATCH for-next 3/9] RDMA/hns: Add return statement when kzalloc  return NULL in hns_roce_v1_recreate_lp_qp "Wei Hu (Xavier)" <xavier.huwei@tom.com> - 2017-09-29 15:20 +0200

csiph-web