target/linux/generic/backport-5.15/775-v6.0-02-net-ethernet-stmicro-stmmac-first-disable-all-queues.patch

   1 From 7028471edb646bfc532fec0973e50e784cdcb7c6 Mon Sep 17 00:00:00 2001
   2 From: Christian Marangi <ansuelsmth@gmail.com>
   3 Date: Sat, 23 Jul 2022 16:29:30 +0200
   4 Subject: [PATCH 2/5] net: ethernet: stmicro: stmmac: first disable all queues
   5  and disconnect in release
   6
   7 Disable all queues and disconnect before tx_disable in stmmac_release to
   8 prevent a corner case where packet may be still queued at the same time
   9 tx_disable is called resulting in kernel panic if some packet still has
  10 to be processed.
  11
  12 Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
  13 Signed-off-by: Jakub Kicinski <kuba@kernel.org>
  14 ---
  15  drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 4 ++--
  16  1 file changed, 2 insertions(+), 2 deletions(-)
  17
  18 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
  19 +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
  20 @@ -3834,8 +3834,6 @@ static int stmmac_release(struct net_dev
  21         struct stmmac_priv *priv = netdev_priv(dev);
  22         u32 chan;
  23
  24 -       netif_tx_disable(dev);
  25 -
  26         if (device_may_wakeup(priv->device))
  27                 phylink_speed_down(priv->phylink, false);
  28         /* Stop and disconnect the PHY */
  29 @@ -3847,6 +3845,8 @@ static int stmmac_release(struct net_dev
  30         for (chan = 0; chan < priv->plat->tx_queues_to_use; chan++)
  31                 hrtimer_cancel(&priv->tx_queue[chan].txtimer);
  32
  33 +       netif_tx_disable(dev);
  34 +
  35         /* Free the IRQ lines */
  36         stmmac_free_irq(dev, REQ_IRQ_ERR_ALL, 0);
  37