net/ena: fix reset reason being overwritten

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: 2081d5e ("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

@@ -539,6 +539,15 @@ ENA_PROXY_DESC(ena_com_indirect_table_get, ENA_MP_IND_TBL_GET,
 }),
 	struct ena_com_dev *ena_dev, u32 *ind_tbl);
 
+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 ena_ring *rx_ring,
 				       struct rte_mbuf *mbuf,
 				       struct ena_com_rx_ctx *ena_rx_ctx,
@@ -666,8 +675,7 @@ 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;
 }
 
@@ -1783,8 +1791,7 @@ static void check_for_missing_keep_alive(struct ena_adapter *adapter)
 	if (unlikely((rte_get_timer_cycles() - adapter->timestamp_wd) >=
 	    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;
 	}
 }
@@ -1794,8 +1801,7 @@ 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);
 	}
 }
 
@@ -2606,14 +2612,13 @@ static uint16_t eth_ena_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
 				rc);
 			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;
 		}
 
@@ -2978,9 +2983,8 @@ static int ena_xmit_mbuf(struct ena_ring *tx_ring, struct rte_mbuf *mbuf)
 	if (unlikely(rc)) {
 		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;
 	}