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    Subject[PATCH 5.14 137/432] RDMA/hns: Bugfix for the missing assignment for dip_idx
    Date
    From: Junxian Huang <huangjunxian4@hisilicon.com>

    [ Upstream commit 074f315fc54a9ce45559a44ca36d9fa1ee1ea2cd ]

    When the dgid-dip_idx mapping relationship exists, dip should be assigned.

    Fixes: f91696f2f053 ("RDMA/hns: Support congestion control type selection according to the FW")
    Link: https://lore.kernel.org/r/1629884592-23424-3-git-send-email-liangwenpeng@huawei.com
    Signed-off-by: Junxian Huang <huangjunxian4@hisilicon.com>
    Signed-off-by: Wenpeng Liang <liangwenpeng@huawei.com>
    Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    drivers/infiniband/hw/hns/hns_roce_hw_v2.c | 4 +++-
    1 file changed, 3 insertions(+), 1 deletion(-)

    diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
    index f4cea6dcec2f..d9e330a383b2 100644
    --- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
    +++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
    @@ -4514,8 +4514,10 @@ static int get_dip_ctx_idx(struct ib_qp *ibqp, const struct ib_qp_attr *attr,
    spin_lock_irqsave(&hr_dev->dip_list_lock, flags);

    list_for_each_entry(hr_dip, &hr_dev->dip_list, node) {
    - if (!memcmp(grh->dgid.raw, hr_dip->dgid, 16))
    + if (!memcmp(grh->dgid.raw, hr_dip->dgid, 16)) {
    + *dip_idx = hr_dip->dip_idx;
    goto out;
    + }
    }

    /* If no dgid is found, a new dip and a mapping between dgid and
    --
    2.30.2


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