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From: Haiyang Zhang <haiyangz@microsoft.com>
To: linux-hyperv@vger.kernel.org, netdev@vger.kernel.org
Cc: haiyangz@microsoft.com, decui@microsoft.com,
	stephen@networkplumber.org, kys@microsoft.com,
	paulros@microsoft.com, olaf@aepfle.de, vkuznets@redhat.com,
	davem@davemloft.net, wei.liu@kernel.org, edumazet@google.com,
	kuba@kernel.org, pabeni@redhat.com, leon@kernel.org,
	longli@microsoft.com, ssengar@linux.microsoft.com,
	linux-rdma@vger.kernel.org, daniel@iogearbox.net,
	john.fastabend@gmail.com, bpf@vger.kernel.org, ast@kernel.org,
	sharmaajay@microsoft.com, hawk@kernel.org, tglx@linutronix.de,
	shradhagupta@linux.microsoft.com, linux-kernel@vger.kernel.org,
	stable@vger.kernel.org
Subject: [PATCH net,v2, 1/3] net: mana: Fix TX CQE error handling
Date: Fri, 29 Sep 2023 13:42:25 -0700	[thread overview]
Message-ID: <1696020147-14989-2-git-send-email-haiyangz@microsoft.com> (raw)
In-Reply-To: <1696020147-14989-1-git-send-email-haiyangz@microsoft.com>

For an unknown TX CQE error type (probably from a newer hardware),
still free the SKB, update the queue tail, etc., otherwise the
accounting will be wrong.

Also, TX errors can be triggered by injecting corrupted packets, so
replace the WARN_ONCE to ratelimited error logging.

Cc: stable@vger.kernel.org
Fixes: ca9c54d2d6a5 ("net: mana: Add a driver for Microsoft Azure Network Adapter (MANA)")
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Reviewed-by: Simon Horman <horms@kernel.org>
---
 drivers/net/ethernet/microsoft/mana/mana_en.c | 18 +++++++++++-------
 1 file changed, 11 insertions(+), 7 deletions(-)

diff --git a/drivers/net/ethernet/microsoft/mana/mana_en.c b/drivers/net/ethernet/microsoft/mana/mana_en.c
index 4a16ebff3d1d..5cdcf7561b38 100644
--- a/drivers/net/ethernet/microsoft/mana/mana_en.c
+++ b/drivers/net/ethernet/microsoft/mana/mana_en.c
@@ -1317,19 +1317,23 @@ static void mana_poll_tx_cq(struct mana_cq *cq)
 		case CQE_TX_VPORT_IDX_OUT_OF_RANGE:
 		case CQE_TX_VPORT_DISABLED:
 		case CQE_TX_VLAN_TAGGING_VIOLATION:
-			WARN_ONCE(1, "TX: CQE error %d: ignored.\n",
-				  cqe_oob->cqe_hdr.cqe_type);
+			if (net_ratelimit())
+				netdev_err(ndev, "TX: CQE error %d\n",
+					   cqe_oob->cqe_hdr.cqe_type);
+
 			apc->eth_stats.tx_cqe_err++;
 			break;
 
 		default:
-			/* If the CQE type is unexpected, log an error, assert,
-			 * and go through the error path.
+			/* If the CQE type is unknown, log an error,
+			 * and still free the SKB, update tail, etc.
 			 */
-			WARN_ONCE(1, "TX: Unexpected CQE type %d: HW BUG?\n",
-				  cqe_oob->cqe_hdr.cqe_type);
+			if (net_ratelimit())
+				netdev_err(ndev, "TX: unknown CQE type %d\n",
+					   cqe_oob->cqe_hdr.cqe_type);
+
 			apc->eth_stats.tx_cqe_unknown_type++;
-			return;
+			break;
 		}
 
 		if (WARN_ON_ONCE(txq->gdma_txq_id != completions[i].wq_num))
-- 
2.25.1


  reply	other threads:[~2023-09-29 20:43 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-09-29 20:42 [PATCH net,v2, 0/3] net: mana: Fix some TX processing bugs Haiyang Zhang
2023-09-29 20:42 ` Haiyang Zhang [this message]
2023-10-03 10:27   ` [PATCH net,v2, 1/3] net: mana: Fix TX CQE error handling Shradha Gupta
2023-09-29 20:42 ` [PATCH net,v2, 2/3] net: mana: Fix the tso_bytes calculation Haiyang Zhang
2023-10-03 10:17   ` Shradha Gupta
2023-09-29 20:42 ` [PATCH net,v2, 3/3] net: mana: Fix oversized sge0 for GSO packets Haiyang Zhang
2023-10-03  9:20   ` Simon Horman
2023-10-03 10:46   ` Shradha Gupta
2023-10-05 10:00 ` [PATCH net,v2, 0/3] net: mana: Fix some TX processing bugs patchwork-bot+netdevbpf

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