leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

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

Browse Source 
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>
This commit is contained in:
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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/infiniband/hw/hns/hns_roce_qp.c
View File

@ -1162,8 +1162,10 @@ int hns_roce_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
mutex_lock(&hr_qp->mutex);
cur_state = attr_mask & IB_QP_CUR_STATE ?
attr->cur_qp_state : (enum ib_qp_state)hr_qp->state;
if (attr_mask & IB_QP_CUR_STATE && attr->cur_qp_state != hr_qp->state)
goto out;
cur_state = hr_qp->state;
new_state = attr_mask & IB_QP_STATE ? attr->qp_state : cur_state;
if (ibqp->uobject &&