RDMA/hns: Add a check for current state before modifying QP

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It should be considered an illegal operation if the ULP attempts to modify
a QP from another state to the current hardware state. Otherwise, the ULP
can modify some fields of QPC at any time. For example, for a QP in state
of RTS, modify it from RTR to RTS can change the PSN, which is always not
as expected.

Fixes: 9a4435375c ("IB/hns: Add driver files for hns RoCE driver")
Link: https://lore.kernel.org/r/1598353674-24270-1-git-send-email-liweihang@huawei.com
Signed-off-by: Lang Cheng <chenglang@huawei.com>
Signed-off-by: Weihang Li <liweihang@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

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Lang Cheng 2020-08-25 19:07:54 +08:00 • committed by Jason Gunthorpe

parent b9caebb290

commit e0ef0f68c4

1 changed files with 4 additions and 2 deletions

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drivers/infiniband/hw/hns/hns_roce_qp.c

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