Fix possible missed completion event

If an erroneous CQE is polled in the first iteration (i.e. npolled ==
0), we don't update the consumer index and hence the hardware could
get a wrong notion of how many CQEs software polled.  Fix this by
updating the doorbell record on error too.

Signed-off-by: Roland Dreier <roland@purestorage.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/cq.c b/src/cq.c
index 8226b6b..0e24fea 100644
--- a/src/cq.c
+++ b/src/cq.c
@@ -340,7 +340,7 @@ int mlx4_poll_cq(struct ibv_cq *ibcq, int ne, struct ibv_wc *wc)
 			break;
 	}
 
-	if (npolled)
+	if (npolled || err == CQ_POLL_ERR)
 		update_cons_index(cq);
 
 	pthread_spin_unlock(&cq->lock);