From: Aya Levin <ayal@mellanox.com>
Date: Tue, 6 Aug 2019 12:19:19 +0000 (+0300)
Subject: net/mlx5e: Fix error flow of CQE recovery on tx reporter
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=276d197e70bcc47153592f4384675b51c7d83aba;p=linux.git

net/mlx5e: Fix error flow of CQE recovery on tx reporter

CQE recovery function begins with test and set of recovery bit. Add an
error flow which ensures clearing of this bit when leaving the recovery
function, to allow further recoveries to take place. This allows removal
of clearing recovery bit on sq activate.

Fixes: de8650a82071 ("net/mlx5e: Add tx reporter support")
Signed-off-by: Aya Levin <ayal@mellanox.com>
Reviewed-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
---

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/reporter_tx.c b/drivers/net/ethernet/mellanox/mlx5/core/en/reporter_tx.c
index b307234b4e05b..b91814ecfbc9e 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/reporter_tx.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/reporter_tx.c
@@ -83,17 +83,17 @@ static int mlx5e_tx_reporter_err_cqe_recover(struct mlx5e_txqsq *sq)
 	if (err) {
 		netdev_err(dev, "Failed to query SQ 0x%x state. err = %d\n",
 			   sq->sqn, err);
-		return err;
+		goto out;
 	}
 
 	if (state != MLX5_SQC_STATE_ERR)
-		return 0;
+		goto out;
 
 	mlx5e_tx_disable_queue(sq->txq);
 
 	err = mlx5e_wait_for_sq_flush(sq);
 	if (err)
-		return err;
+		goto out;
 
 	/* At this point, no new packets will arrive from the stack as TXQ is
 	 * marked with QUEUE_STATE_DRV_XOFF. In addition, NAPI cleared all
@@ -102,13 +102,17 @@ static int mlx5e_tx_reporter_err_cqe_recover(struct mlx5e_txqsq *sq)
 
 	err = mlx5e_sq_to_ready(sq, state);
 	if (err)
-		return err;
+		goto out;
 
 	mlx5e_reset_txqsq_cc_pc(sq);
 	sq->stats->recover++;
+	clear_bit(MLX5E_SQ_STATE_RECOVERING, &sq->state);
 	mlx5e_activate_txqsq(sq);
 
 	return 0;
+out:
+	clear_bit(MLX5E_SQ_STATE_RECOVERING, &sq->state);
+	return err;
 }
 
 static int mlx5_tx_health_report(struct devlink_health_reporter *tx_reporter,
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
index 6c712c5be4d81..9d5f6e56188f8 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
@@ -1321,7 +1321,6 @@ err_free_txqsq:
 void mlx5e_activate_txqsq(struct mlx5e_txqsq *sq)
 {
 	sq->txq = netdev_get_tx_queue(sq->channel->netdev, sq->txq_ix);
-	clear_bit(MLX5E_SQ_STATE_RECOVERING, &sq->state);
 	set_bit(MLX5E_SQ_STATE_ENABLED, &sq->state);
 	netdev_tx_reset_queue(sq->txq);
 	netif_tx_start_queue(sq->txq);