Patch "net: ena: Extract recurring driver reset code into a function" has been added to the 5.15-stable tree

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This is a note to let you know that I've just added the patch titled

    net: ena: Extract recurring driver reset code into a function

to the 5.15-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     net-ena-extract-recurring-driver-reset-code-into-a-f.patch
and it can be found in the queue-5.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit f2b7b0ce3cb43e019dc08d974678a265cde5d5bd
Author: Arthur Kiyanovski <akiyano@xxxxxxxxxx>
Date:   Fri Jan 7 20:23:46 2022 +0000

    net: ena: Extract recurring driver reset code into a function
    
    [ Upstream commit 9fe890cc5bb84d6859d9a2422830b7fd6fd20521 ]
    
    Create an inline function for resetting the driver
    to reduce code duplication.
    
    Signed-off-by: Nati Koler <nkoler@xxxxxxxxxx>
    Signed-off-by: Arthur Kiyanovski <akiyano@xxxxxxxxxx>
    Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
    Stable-dep-of: 2dc8b1e7177d ("net: ena: Fix redundant device NUMA node override")
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c b/drivers/net/ethernet/amazon/ena/ena_netdev.c
index 3ea449be7bdc3..cf8148a159ee0 100644
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.c
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c
@@ -103,7 +103,7 @@ static void ena_tx_timeout(struct net_device *dev, unsigned int txqueue)
 	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");
@@ -166,11 +166,9 @@ static int ena_xmit_common(struct net_device *dev,
 			  "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;
 	}
 
@@ -1297,10 +1295,8 @@ static int handle_invalid_req_id(struct ena_ring *ring, u16 req_id,
 			  req_id);
 
 	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;
 }
 
@@ -1463,10 +1459,7 @@ static struct sk_buff *ena_rx_skb(struct ena_ring *rx_ring,
 		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;
 	}
 
@@ -1806,15 +1799,12 @@ static int ena_clean_rx_irq(struct ena_ring *rx_ring, struct napi_struct *napi,
 	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;
 }
 
@@ -3740,9 +3730,8 @@ static int check_for_rx_interrupt_queue(struct ena_adapter *adapter,
 		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;
 	}
 
@@ -3779,9 +3768,7 @@ static int check_missing_comp_in_tx_queue(struct ena_adapter *adapter,
 			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;
 		}
 
@@ -3807,9 +3794,7 @@ static int check_missing_comp_in_tx_queue(struct ena_adapter *adapter,
 			  "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;
 	}
 
@@ -3933,8 +3918,7 @@ static void check_for_missing_keep_alive(struct ena_adapter *adapter)
 			  "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);
 	}
 }
 
@@ -3945,8 +3929,7 @@ static void check_for_admin_com_state(struct ena_adapter *adapter)
 			  "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);
 	}
 }
 
diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.h b/drivers/net/ethernet/amazon/ena/ena_netdev.h
index bf2a39c91c00d..4ad5a086b47ea 100644
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.h
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.h
@@ -410,6 +410,15 @@ int ena_set_rx_copybreak(struct ena_adapter *adapter, u32 rx_copybreak);
 
 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,




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