target/linux/brcm2708/patches-4.19/950-0754-Revert-net-bcmgenet-Workaround-for-Pi-4B-network-iss.patch

   1 From 024173b78ac6c6ce9dca879274b1e8a8e9000738 Mon Sep 17 00:00:00 2001
   2 From: Phil Elwell <phil@raspberrypi.org>
   3 Date: Fri, 9 Aug 2019 08:52:16 +0100
   4 Subject: [PATCH 754/806] Revert "net: bcmgenet: Workaround for Pi 4B network
   5  issue"
   6
   7 This reverts commit 9c0770ea7682a84a22c33410ef6870af258abacc.
   8 ---
   9  .../net/ethernet/broadcom/genet/bcmgenet.c    | 22 -------------------
  10  1 file changed, 22 deletions(-)
  11
  12 --- a/drivers/net/ethernet/broadcom/genet/bcmgenet.c
  13 +++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
  14 @@ -72,10 +72,6 @@
  15  #define GENET_RDMA_REG_OFF     (priv->hw_params->rdma_offset + \
  16                                 TOTAL_DESC * DMA_DESC_SIZE)
  17
  18 -static bool force_reneg = false;
  19 -module_param(force_reneg, bool, 0444);
  20 -MODULE_PARM_DESC(force_reneg, "Force a renegotiation after the initial link-up");
  21 -
  22  static inline void bcmgenet_writel(u32 value, void __iomem *offset)
  23  {
  24         /* MIPS chips strapped for BE will automagically configure the
  25 @@ -2616,7 +2612,6 @@ static void bcmgenet_irq_task(struct wor
  26         unsigned int status;
  27         struct bcmgenet_priv *priv = container_of(
  28                         work, struct bcmgenet_priv, bcmgenet_irq_work);
  29 -       static int first_link = 1;
  30
  31         netif_dbg(priv, intr, priv->dev, "%s\n", __func__);
  32
  33 @@ -2630,26 +2625,9 @@ static void bcmgenet_irq_task(struct wor
  34                 phy_init_hw(priv->dev->phydev);
  35
  36         /* Link UP/DOWN event */
  37 -       if (status & UMAC_IRQ_LINK_EVENT) {
  38 +       if (status & UMAC_IRQ_LINK_EVENT)
  39                 phy_mac_interrupt(priv->dev->phydev);
  40
  41 -               if (priv->dev->phydev->link && first_link) {
  42 -                       first_link = 0;
  43 -                       /*
  44 -                        * HACK: Some Pi4Bs, when paired with some switches,
  45 -                        * come up in a strange state where they are unable to
  46 -                        * transmit, causing them to fail to get an IP address.
  47 -                        * Although the failure mechanism is not yet understood,
  48 -                        * forcing renegotiation at this point has been shown
  49 -                        * to be effective in avoiding the problem.
  50 -                        */
  51 -                       if (force_reneg) {
  52 -                               dev_info(&priv->pdev->dev,
  53 -                                       "Forcing renegotiation\n");
  54 -                               genphy_restart_aneg(priv->dev->phydev);
  55 -                       }
  56 -               }
  57 -       }
  58  }
  59
  60  /* bcmgenet_isr1: handle Rx and Tx priority queues */