From: Arthur Kiyanovski <akiyano@amazon.com>
Date: Fri, 7 Jan 2022 20:23:46 +0000
Subject: net: ena: Extract recurring driver reset code into a function
Patch-mainline: v5.17-rc1
Git-commit: 9fe890cc5bb84d6859d9a2422830b7fd6fd20521
References: bsc#1197099 jsc#SLE-24125

Create an inline function for resetting the driver
to reduce code duplication.

Signed-off-by: Nati Koler <nkoler@amazon.com>
Signed-off-by: Arthur Kiyanovski <akiyano@amazon.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/amazon/ena/ena_netdev.c |   45 ++++++++-------------------
 drivers/net/ethernet/amazon/ena/ena_netdev.h |    9 +++++
 2 files changed, 23 insertions(+), 31 deletions(-)

--- a/drivers/net/ethernet/amazon/ena/ena_netdev.c
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c
@@ -107,7 +107,7 @@ static void ena_tx_timeout(struct net_de
 	if (test_and_set_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags))
 		return;
 
-	adapter->reset_reason = ENA_REGS_RESET_OS_NETDEV_WD;
+	ena_reset_device(adapter, ENA_REGS_RESET_OS_NETDEV_WD);
 	ena_increase_stat(&adapter->dev_stats.tx_timeout, 1, &adapter->syncp);
 
 	netif_err(adapter, tx_err, dev, "Transmit time out\n");
@@ -170,11 +170,9 @@ static int ena_xmit_common(struct net_de
 			  "Failed to prepare tx bufs\n");
 		ena_increase_stat(&ring->tx_stats.prepare_ctx_err, 1,
 				  &ring->syncp);
-		if (rc != -ENOMEM) {
-			adapter->reset_reason =
-				ENA_REGS_RESET_DRIVER_INVALID_STATE;
-			set_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags);
-		}
+		if (rc != -ENOMEM)
+			ena_reset_device(adapter,
+					 ENA_REGS_RESET_DRIVER_INVALID_STATE);
 		return rc;
 	}
 
@@ -1292,10 +1290,8 @@ static int handle_invalid_req_id(struct
 			  req_id, ring->qid);
 
 	ena_increase_stat(&ring->tx_stats.bad_req_id, 1, &ring->syncp);
+	ena_reset_device(ring->adapter, ENA_REGS_RESET_INV_TX_REQ_ID);
 
-	/* Trigger device reset */
-	ring->adapter->reset_reason = ENA_REGS_RESET_INV_TX_REQ_ID;
-	set_bit(ENA_FLAG_TRIGGER_RESET, &ring->adapter->flags);
 	return -EFAULT;
 }
 
@@ -1458,10 +1454,7 @@ static struct sk_buff *ena_rx_skb(struct
 		netif_err(adapter, rx_err, rx_ring->netdev,
 			  "Page is NULL. qid %u req_id %u\n", rx_ring->qid, req_id);
 		ena_increase_stat(&rx_ring->rx_stats.bad_req_id, 1, &rx_ring->syncp);
-		adapter->reset_reason = ENA_REGS_RESET_INV_RX_REQ_ID;
-		/* Make sure reset reason is set before triggering the reset */
-		smp_mb__before_atomic();
-		set_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags);
+		ena_reset_device(adapter, ENA_REGS_RESET_INV_RX_REQ_ID);
 		return NULL;
 	}
 
@@ -1795,15 +1788,12 @@ error:
 	if (rc == -ENOSPC) {
 		ena_increase_stat(&rx_ring->rx_stats.bad_desc_num, 1,
 				  &rx_ring->syncp);
-		adapter->reset_reason = ENA_REGS_RESET_TOO_MANY_RX_DESCS;
+		ena_reset_device(adapter, ENA_REGS_RESET_TOO_MANY_RX_DESCS);
 	} else {
 		ena_increase_stat(&rx_ring->rx_stats.bad_req_id, 1,
 				  &rx_ring->syncp);
-		adapter->reset_reason = ENA_REGS_RESET_INV_RX_REQ_ID;
+		ena_reset_device(adapter, ENA_REGS_RESET_INV_RX_REQ_ID);
 	}
-
-	set_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags);
-
 	return 0;
 }
 
@@ -3726,9 +3716,8 @@ static int check_for_rx_interrupt_queue(
 		netif_err(adapter, rx_err, adapter->netdev,
 			  "Potential MSIX issue on Rx side Queue = %d. Reset the device\n",
 			  rx_ring->qid);
-		adapter->reset_reason = ENA_REGS_RESET_MISS_INTERRUPT;
-		smp_mb__before_atomic();
-		set_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags);
+
+		ena_reset_device(adapter, ENA_REGS_RESET_MISS_INTERRUPT);
 		return -EIO;
 	}
 
@@ -3765,9 +3754,7 @@ static int check_missing_comp_in_tx_queu
 			netif_err(adapter, tx_err, adapter->netdev,
 				  "Potential MSIX issue on Tx side Queue = %d. Reset the device\n",
 				  tx_ring->qid);
-			adapter->reset_reason = ENA_REGS_RESET_MISS_INTERRUPT;
-			smp_mb__before_atomic();
-			set_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags);
+			ena_reset_device(adapter, ENA_REGS_RESET_MISS_INTERRUPT);
 			return -EIO;
 		}
 
@@ -3793,9 +3780,7 @@ static int check_missing_comp_in_tx_queu
 			  "The number of lost tx completions is above the threshold (%d > %d). Reset the device\n",
 			  missed_tx,
 			  adapter->missing_tx_completion_threshold);
-		adapter->reset_reason =
-			ENA_REGS_RESET_MISS_TX_CMPL;
-		set_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags);
+		ena_reset_device(adapter, ENA_REGS_RESET_MISS_TX_CMPL);
 		rc = -EIO;
 	}
 
@@ -3916,8 +3901,7 @@ static void check_for_missing_keep_alive
 			  "Keep alive watchdog timeout.\n");
 		ena_increase_stat(&adapter->dev_stats.wd_expired, 1,
 				  &adapter->syncp);
-		adapter->reset_reason = ENA_REGS_RESET_KEEP_ALIVE_TO;
-		set_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags);
+		ena_reset_device(adapter, ENA_REGS_RESET_KEEP_ALIVE_TO);
 	}
 }
 
@@ -3928,8 +3912,7 @@ static void check_for_admin_com_state(st
 			  "ENA admin queue is not in running state!\n");
 		ena_increase_stat(&adapter->dev_stats.admin_q_pause, 1,
 				  &adapter->syncp);
-		adapter->reset_reason = ENA_REGS_RESET_ADMIN_TO;
-		set_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags);
+		ena_reset_device(adapter, ENA_REGS_RESET_ADMIN_TO);
 	}
 }
 
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.h
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.h
@@ -398,6 +398,15 @@ int ena_update_queue_count(struct ena_ad
 
 int ena_get_sset_count(struct net_device *netdev, int sset);
 
+static inline void ena_reset_device(struct ena_adapter *adapter,
+				    enum ena_regs_reset_reason_types reset_reason)
+{
+	adapter->reset_reason = reset_reason;
+	/* Make sure reset reason is set before triggering the reset */
+	smp_mb__before_atomic();
+	set_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags);
+}
+
 enum ena_xdp_errors_t {
 	ENA_XDP_ALLOWED = 0,
 	ENA_XDP_CURRENT_MTU_TOO_LARGE,