When flush cqe, it needs to get the pointer of rq and sq from
db address space of user and update it into qp context by
modified qp. if rq is not exist, it will not get the value
from db addresss space of user.
Signed-off-by: Lijun Ou <oulijun@xxxxxxxxxx>
---
V2->V3:
1. Fix the comement given by leon's reviews.
V1->V2:
1. regenerate this patch in order to resolve the conflict
---
drivers/infiniband/hw/hns/hns_roce_qp.c | 19 ++++++++++---------
1 file changed, 10 insertions(+), 9 deletions(-)
diff --git a/drivers/infiniband/hw/hns/hns_roce_qp.c b/drivers/infiniband/hw/hns/hns_roce_qp.c
index accf9ce..507de9d 100644
--- a/drivers/infiniband/hw/hns/hns_roce_qp.c
+++ b/drivers/infiniband/hw/hns/hns_roce_qp.c
@@ -675,6 +675,10 @@ static int hns_roce_create_qp_common(struct hns_roce_dev *hr_dev,
dev_err(dev, "rq record doorbell map failed!\n");
goto err_sq_dbmap;
}
+
+ /* indicate kernel supports rq record db */
+ resp.cap_flags |= HNS_ROCE_SUPPORT_RQ_RECORD_DB;
+ hr_qp->rdb_en = 1;
}
} else {
if (init_attr->create_flags &
@@ -783,16 +787,11 @@ static int hns_roce_create_qp_common(struct hns_roce_dev *hr_dev,
else
hr_qp->doorbell_qpn = cpu_to_le64(hr_qp->qpn);
- if (udata && (udata->outlen >= sizeof(resp)) &&
- (hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_RECORD_DB)) {
-
- /* indicate kernel supports rq record db */
- resp.cap_flags |= HNS_ROCE_SUPPORT_RQ_RECORD_DB;
- ret = ib_copy_to_udata(udata, &resp, sizeof(resp));
+ if (udata) {
+ ret = ib_copy_to_udata(udata, &resp,
+ min(udata->outlen, sizeof(resp)));
if (ret)
goto err_qp;
-
- hr_qp->rdb_en = 1;
}
hr_qp->event = hns_roce_ib_qp_event;
@@ -969,7 +968,9 @@ int hns_roce_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
(attr_mask & IB_QP_STATE) && new_state == IB_QPS_ERR) {
if (hr_qp->sdb_en == 1) {
hr_qp->sq.head = *(int *)(hr_qp->sdb.virt_addr);
- hr_qp->rq.head = *(int *)(hr_qp->rdb.virt_addr);
+
+ if (hr_qp->rdb_en == 1)
+ hr_qp->rq.head = *(int *)(hr_qp->rdb.virt_addr);
} else {
dev_warn(dev, "flush cqe is not supported in userspace!\n");
goto out;
--
1.9.1
