patch 'net/ena: fix reset reason being overwritten' has been queued to stable release 21.11.1

[Kevin Traynor <ktraynor@redhat.com>]

Hi,

FYI, your patch has been queued to stable release 21.11.1

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 03/06/22. So please
shout if anyone has objections.

Also note that after the patch there's a diff of the upstream commit vs the
patch applied to the branch. This will indicate if there was any rebasing
needed to apply to the stable branch. If there were code changes for rebasing
(ie: not only metadata diffs), please double check that the rebase was
correctly done.

Queued patches are on a temporary branch at:
https://github.com/kevintraynor/dpdk-stable

This queued commit can be viewed at:
https://github.com/kevintraynor/dpdk-stable/commit/caae58d539a2f97671b86c5f1e611d2557ed973a

Thanks.

Kevin

---
From caae58d539a2f97671b86c5f1e611d2557ed973a Mon Sep 17 00:00:00 2001
From: Dawid Gorecki <dgr@semihalf.com>
Date: Wed, 23 Feb 2022 13:19:38 +0100
Subject: [PATCH] net/ena: fix reset reason being overwritten

[ upstream 2bae75eaa2e036020b726f61bc607a8f4142c3a8 ]

When triggering the reset, no check was performed to see if the reset
was already triggered. This could result in original reset reason being
overwritten. Add ena_trigger_reset helper function, which checks if the
reset was triggered and only sets the reset reason if the reset wasn't
triggered yet. Replace all occurrences of manually setting the reset
with ena_trigger_reset call.

Fixes: 2081d5e2e92d ("net/ena: add reset routine")
Cc: stable@dpdk.org

Signed-off-by: Dawid Gorecki <dgr@semihalf.com>
Reviewed-by: Michal Krawczyk <mk@semihalf.com>
Reviewed-by: Shai Brandes <shaibran@amazon.com>
---
 drivers/net/ena/ena_ethdev.c | 32 ++++++++++++++++++--------------
 1 file changed, 18 insertions(+), 14 deletions(-)

diff --git a/drivers/net/ena/ena_ethdev.c b/drivers/net/ena/ena_ethdev.c
index b3a9cccd40..a3c073a95e 100644
--- a/drivers/net/ena/ena_ethdev.c
+++ b/drivers/net/ena/ena_ethdev.c
@@ -276,4 +276,13 @@ static const struct eth_dev_ops ena_dev_ops = {
 };
 
+static inline void ena_trigger_reset(struct ena_adapter *adapter,
+				     enum ena_regs_reset_reason_types reason)
+{
+	if (likely(!adapter->trigger_reset)) {
+		adapter->reset_reason = reason;
+		adapter->trigger_reset = true;
+	}
+}
+
 static inline void ena_rx_mbuf_prepare(struct rte_mbuf *mbuf,
 				       struct ena_com_rx_ctx *ena_rx_ctx,
@@ -395,6 +404,5 @@ static int validate_tx_req_id(struct ena_ring *tx_ring, u16 req_id)
 	/* Trigger device reset */
 	++tx_ring->tx_stats.bad_req_id;
-	tx_ring->adapter->reset_reason = ENA_REGS_RESET_INV_TX_REQ_ID;
-	tx_ring->adapter->trigger_reset	= true;
+	ena_trigger_reset(tx_ring->adapter, ENA_REGS_RESET_INV_TX_REQ_ID);
 	return -EFAULT;
 }
@@ -1525,6 +1533,5 @@ static void check_for_missing_keep_alive(struct ena_adapter *adapter)
 	    adapter->keep_alive_timeout)) {
 		PMD_DRV_LOG(ERR, "Keep alive timeout\n");
-		adapter->reset_reason = ENA_REGS_RESET_KEEP_ALIVE_TO;
-		adapter->trigger_reset = true;
+		ena_trigger_reset(adapter, ENA_REGS_RESET_KEEP_ALIVE_TO);
 		++adapter->dev_stats.wd_expired;
 	}
@@ -1536,6 +1543,5 @@ static void check_for_admin_com_state(struct ena_adapter *adapter)
 	if (unlikely(!ena_com_get_admin_running_state(&adapter->ena_dev))) {
 		PMD_DRV_LOG(ERR, "ENA admin queue is not in running state\n");
-		adapter->reset_reason = ENA_REGS_RESET_ADMIN_TO;
-		adapter->trigger_reset = true;
+		ena_trigger_reset(adapter, ENA_REGS_RESET_ADMIN_TO);
 	}
 }
@@ -2321,12 +2327,11 @@ static uint16_t eth_ena_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
 			if (rc == ENA_COM_NO_SPACE) {
 				++rx_ring->rx_stats.bad_desc_num;
-				rx_ring->adapter->reset_reason =
-					ENA_REGS_RESET_TOO_MANY_RX_DESCS;
+				ena_trigger_reset(rx_ring->adapter,
+					ENA_REGS_RESET_TOO_MANY_RX_DESCS);
 			} else {
 				++rx_ring->rx_stats.bad_req_id;
-				rx_ring->adapter->reset_reason =
-					ENA_REGS_RESET_INV_RX_REQ_ID;
+				ena_trigger_reset(rx_ring->adapter,
+					ENA_REGS_RESET_INV_RX_REQ_ID);
 			}
-			rx_ring->adapter->trigger_reset = true;
 			return 0;
 		}
@@ -2728,7 +2733,6 @@ static int ena_xmit_mbuf(struct ena_ring *tx_ring, struct rte_mbuf *mbuf)
 		PMD_DRV_LOG(ERR, "Failed to prepare Tx buffers, rc: %d\n", rc);
 		++tx_ring->tx_stats.prepare_ctx_err;
-		tx_ring->adapter->reset_reason =
-		    ENA_REGS_RESET_DRIVER_INVALID_STATE;
-		tx_ring->adapter->trigger_reset = true;
+		ena_trigger_reset(tx_ring->adapter,
+			ENA_REGS_RESET_DRIVER_INVALID_STATE);
 		return rc;
 	}
-- 
2.34.1