diff --git a/drivers/infiniband/hw/mlx4/cq.c b/drivers/infiniband/hw/mlx4/cq.c
index 8bf44da..9d32c49 100644
--- a/drivers/infiniband/hw/mlx4/cq.c
+++ b/drivers/infiniband/hw/mlx4/cq.c
@@ -430,7 +430,7 @@
 		wc->dlid_path_bits = (be32_to_cpu(cqe->g_mlpath_rqpn) >> 24) & 0x7f;
 		wc->wc_flags      |= be32_to_cpu(cqe->g_mlpath_rqpn) & 0x80000000 ?
 			IB_WC_GRH : 0;
-		wc->pkey_index     = be32_to_cpu(cqe->immed_rss_invalid) >> 16;
+		wc->pkey_index     = be32_to_cpu(cqe->immed_rss_invalid) & 0x7f;
 	}
 
 	return 0;