RDMA/hns: Bugfix for incorrect association between dip_idx and dgid

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dip_idx and dgid should be a one-to-one mapping relationship, but when
qp_num loops back to the start number, it may happen that two different
dgid are assiociated to the same dip_idx incorrectly.

One solution is to store the qp_num that is not assigned to dip_idx in an
array. When a dip_idx needs to be allocated to a new dgid, an spare qp_num
is extracted and assigned to dip_idx.

Fixes: f91696f2f0 ("RDMA/hns: Support congestion control type selection according to the FW")
Link: https://lore.kernel.org/r/1629884592-23424-4-git-send-email-liangwenpeng@huawei.com
Signed-off-by: Junxian Huang <huangjunxian4@hisilicon.com>
Signed-off-by: Yangyang Li <liyangyang20@huawei.com>
Signed-off-by: Wenpeng Liang <liangwenpeng@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

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Junxian Huang 2021-08-25 17:43:12 +08:00 • committed by Jason Gunthorpe

parent 074f315fc5

commit eb653eda1e

4 changed files with 31 additions and 5 deletions

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9

drivers/infiniband/hw/hns/hns_roce_device.h

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9

drivers/infiniband/hw/hns/hns_roce_hw_v2.c

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8

drivers/infiniband/hw/hns/hns_roce_main.c

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10

drivers/infiniband/hw/hns/hns_roce_qp.c

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