From: Haiyang Zhang <haiyangz@microsoft.com>
Date: Tue, 24 Aug 2021 09:46:01 -0700
Patch-mainline: v5.15-rc1
Subject: net: mana: Add WARN_ON_ONCE in case of CQE read overflow
Git-commit: c1a3e9f98dde4782290d2c4871e42b7e76ad5593
References: jsc#SLE-18779, bsc#1185727
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>
Acked-by: Olaf Hering <ohering@suse.de>
---
drivers/net/ethernet/microsoft/mana/gdma_main.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/microsoft/mana/gdma_main.c b/drivers/net/ethernet/microsoft/mana/gdma_main.c
--- 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;