net: mana: Add WARN_ON_ONCE in case of CQE read overflow

This is not an expected case normally.
Add WARN_ON_ONCE in case of CQE read overflow, instead of failing
silently.

Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/microsoft/mana/gdma_main.c b/drivers/net/ethernet/microsoft/mana/gdma_main.c
index 798099d642027044b18c301f985c2b4ad05e1707..cee75b561f59d0ff9b8b293139a599260887aa0a 100644 (file)
--- a/drivers/net/ethernet/microsoft/mana/gdma_main.c
+++ b/drivers/net/ethernet/microsoft/mana/gdma_main.c
@@ -1093,7 +1093,7 @@ static int mana_gd_read_cqe(struct gdma_queue *cq, struct gdma_comp *comp)
 
        new_bits = (cq->head / num_cqe) & GDMA_CQE_OWNER_MASK;
        /* Return -1 if overflow detected. */
-       if (owner_bits != new_bits)
+       if (WARN_ON_ONCE(owner_bits != new_bits))
                return -1;
 
        comp->wq_num = cqe->cqe_info.wq_num;