From 7028471edb646bfc532fec0973e50e784cdcb7c6 Mon Sep 17 00:00:00 2001 From: Christian Marangi <ansuelsmth@gmail.com> Date: Sat, 23 Jul 2022 16:29:30 +0200 Subject: [PATCH 2/5] net: ethernet: stmicro: stmmac: first disable all queues and disconnect in release Disable all queues and disconnect before tx_disable in stmmac_release to prevent a corner case where packet may be still queued at the same time tx_disable is called resulting in kernel panic if some packet still has to be processed. Signed-off-by: Christian Marangi <ansuelsmth@gmail.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org> --- drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -3837,8 +3837,6 @@ static int stmmac_release(struct net_dev struct stmmac_priv *priv = netdev_priv(dev); u32 chan; - netif_tx_disable(dev); - if (device_may_wakeup(priv->device)) phylink_speed_down(priv->phylink, false); /* Stop and disconnect the PHY */ @@ -3850,6 +3848,8 @@ static int stmmac_release(struct net_dev for (chan = 0; chan < priv->plat->tx_queues_to_use; chan++) hrtimer_cancel(&priv->tx_queue[chan].txtimer); + netif_tx_disable(dev); + /* Free the IRQ lines */ stmmac_free_irq(dev, REQ_IRQ_ERR_ALL, 0);