linux-kernel - [PATCH 4.12 096/106] net/mlx5e: Schedule overflow check work to mlx5e workqueue

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Date:   Wed,  9 Aug 2017 09:53:20 -0700
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Eugenia Emantayev <eugenia@...lanox.com>,
        Saeed Mahameed <saeedm@...lanox.com>
Subject: [PATCH 4.12 096/106] net/mlx5e: Schedule overflow check work to mlx5e workqueue

4.12-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Eugenia Emantayev <eugenia@...lanox.com>


[ Upstream commit f08c39ed0bfb503c7b3e013cd40d036ce6a0941a ]

This is done in order to ensure that work will not run after the cleanup.

Fixes: ef9814deafd0 ('net/mlx5e: Add HW timestamping (TS) support')
Signed-off-by: Eugenia Emantayev <eugenia@...lanox.com>
Signed-off-by: Saeed Mahameed <saeedm@...lanox.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/ethernet/mellanox/mlx5/core/en_clock.c |   11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

--- a/drivers/net/ethernet/mellanox/mlx5/core/en_clock.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_clock.c
@@ -114,13 +114,14 @@ static void mlx5e_timestamp_overflow(str
 	struct delayed_work *dwork = to_delayed_work(work);
 	struct mlx5e_tstamp *tstamp = container_of(dwork, struct mlx5e_tstamp,
 						   overflow_work);
+	struct mlx5e_priv *priv = container_of(tstamp, struct mlx5e_priv, tstamp);
 	unsigned long flags;
 
 	write_lock_irqsave(&tstamp->lock, flags);
 	timecounter_read(&tstamp->clock);
 	write_unlock_irqrestore(&tstamp->lock, flags);
-	schedule_delayed_work(&tstamp->overflow_work,
-			      msecs_to_jiffies(tstamp->overflow_period * 1000));
+	queue_delayed_work(priv->wq, &tstamp->overflow_work,
+			   msecs_to_jiffies(tstamp->overflow_period * 1000));
 }
 
 int mlx5e_hwstamp_set(struct net_device *dev, struct ifreq *ifr)
@@ -578,7 +579,7 @@ void mlx5e_timestamp_init(struct mlx5e_p
 	INIT_WORK(&tstamp->pps_info.out_work, mlx5e_pps_out);
 	INIT_DELAYED_WORK(&tstamp->overflow_work, mlx5e_timestamp_overflow);
 	if (tstamp->overflow_period)
-		schedule_delayed_work(&tstamp->overflow_work, 0);
+		queue_delayed_work(priv->wq, &tstamp->overflow_work, 0);
 	else
 		mlx5_core_warn(priv->mdev, "invalid overflow period, overflow_work is not scheduled\n");
 
@@ -614,8 +615,6 @@ void mlx5e_timestamp_cleanup(struct mlx5
 	}
 
 	cancel_work_sync(&tstamp->pps_info.out_work);
-
-	kfree(tstamp->ptp_info.pin_config);
-
 	cancel_delayed_work_sync(&tstamp->overflow_work);
+	kfree(tstamp->ptp_info.pin_config);
 }