From: Lang Cheng <chengl...@huawei.com>
[ Upstream commit e0ef0f68c4c0d85b1eb63f38d5d10324361280e8 ]
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: 9a4435375cd1 ("IB/hns: Add driver files for hns RoCE driver")
Link:
https://lore.kernel.org/r/1598353674-24270-1-git-send-email-liweih...@huawei.com
Signed-off-by: Lang Cheng <chengl...@huawei.com>
Signed-off-by: Weihang Li <liweih...@huawei.com>
Signed-off-by: Jason Gunthorpe <j...@nvidia.com>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
drivers/infiniband/hw/hns/hns_roce_qp.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/infiniband/hw/hns/hns_roce_qp.c
b/drivers/infiniband/hw/hns/hns_roce_qp.c
index c063c450c715f..975281f034685 100644
--- a/drivers/infiniband/hw/hns/hns_roce_qp.c
+++ b/drivers/infiniband/hw/hns/hns_roce_qp.c
@@ -1161,8 +1161,10 @@ 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 &&
--
2.25.1
