Fix for checking if the QP associated with a completion
has been destroyed while processing CQ elements.
If that is the case, move the CQ head to the next element
and continue completion processing.
Signed-off-by: Tatyana Nikolova <tatyana.e.nikolova@xxxxxxxxx>
Signed-off-by: Faisal Latif <faisal.latif@xxxxxxxxx>
---
drivers/infiniband/hw/i40iw/i40iw_status.h | 1 +
drivers/infiniband/hw/i40iw/i40iw_uk.c | 5 +++++
drivers/infiniband/hw/i40iw/i40iw_verbs.c | 2 ++
3 files changed, 8 insertions(+)
diff --git a/drivers/infiniband/hw/i40iw/i40iw_status.h b/drivers/infiniband/hw/i40iw/i40iw_status.h
index b0110c1..91c4217 100644
--- a/drivers/infiniband/hw/i40iw/i40iw_status.h
+++ b/drivers/infiniband/hw/i40iw/i40iw_status.h
@@ -95,6 +95,7 @@ enum i40iw_status_code {
I40IW_ERR_INVALID_MAC_ADDR = -65,
I40IW_ERR_BAD_STAG = -66,
I40IW_ERR_CQ_COMPL_ERROR = -67,
+ I40IW_ERR_QUEUE_DESTROYED = -68
};
#endif
diff --git a/drivers/infiniband/hw/i40iw/i40iw_uk.c b/drivers/infiniband/hw/i40iw/i40iw_uk.c
index 2cd9091..e35faea8 100644
--- a/drivers/infiniband/hw/i40iw/i40iw_uk.c
+++ b/drivers/infiniband/hw/i40iw/i40iw_uk.c
@@ -802,6 +802,10 @@ static enum i40iw_status_code i40iw_cq_poll_completion(struct i40iw_cq_uk *cq,
info->is_srq = (bool)RS_64(qword3, I40IWCQ_SRQ);
qp = (struct i40iw_qp_uk *)(unsigned long)comp_ctx;
+ if (!qp) {
+ ret_code = I40IW_ERR_QUEUE_DESTROYED;
+ goto exit;
+ }
wqe_idx = (u32)RS_64(qword3, I40IW_CQ_WQEIDX);
info->qp_handle = (i40iw_qp_handle)(unsigned long)qp;
@@ -859,6 +863,7 @@ static enum i40iw_status_code i40iw_cq_poll_completion(struct i40iw_cq_uk *cq,
ret_code = 0;
+exit:
if (!ret_code &&
(info->comp_status == I40IW_COMPL_STATUS_FLUSHED))
if (pring && (I40IW_RING_MORE_WORK(*pring)))
diff --git a/drivers/infiniband/hw/i40iw/i40iw_verbs.c b/drivers/infiniband/hw/i40iw/i40iw_verbs.c
index 45f70f5..eaa79c9 100644
--- a/drivers/infiniband/hw/i40iw/i40iw_verbs.c
+++ b/drivers/infiniband/hw/i40iw/i40iw_verbs.c
@@ -2259,6 +2259,8 @@ static int i40iw_poll_cq(struct ib_cq *ibcq,
ret = ukcq->ops.iw_cq_poll_completion(ukcq, &cq_poll_info, true);
if (ret == I40IW_ERR_QUEUE_EMPTY) {
break;
+ } else if (ret == I40IW_ERR_QUEUE_DESTROYED) {
+ continue;
} else if (ret) {
if (!cqe_count)
cqe_count = -1;
--
2.7.4
--
To unsubscribe from this list: send the line "unsubscribe linux-rdma" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
