diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.19/950-0749-net-bcmgenet-Workaround-for-Pi-4B-network-issue.patch')
-rw-r--r-- | target/linux/brcm2708/patches-4.19/950-0749-net-bcmgenet-Workaround-for-Pi-4B-network-issue.patch | 65 |
1 files changed, 0 insertions, 65 deletions
diff --git a/target/linux/brcm2708/patches-4.19/950-0749-net-bcmgenet-Workaround-for-Pi-4B-network-issue.patch b/target/linux/brcm2708/patches-4.19/950-0749-net-bcmgenet-Workaround-for-Pi-4B-network-issue.patch deleted file mode 100644 index 7cb26f10d3..0000000000 --- a/target/linux/brcm2708/patches-4.19/950-0749-net-bcmgenet-Workaround-for-Pi-4B-network-issue.patch +++ /dev/null @@ -1,65 +0,0 @@ -From 29109f495f5842f4e9a09ffb54ae3e13298fff07 Mon Sep 17 00:00:00 2001 -From: Phil Elwell <phil@raspberrypi.org> -Date: Fri, 2 Aug 2019 22:25:27 +0100 -Subject: [PATCH 749/773] net: bcmgenet: Workaround for Pi 4B network issue - -Some combinations of Pi 4Bs and Ethernet switches don't reliably get a -DCHP-assigned IP address, leaving the unit with a self=assigned 169.254 -address. - -Forcing renegotiation has been found to be an effective workaround, so -add an automatic renegotiation after the link comes up for the first -time; enable it with genet.force_reneg=y - by default it is disabled. - -See: https://github.com/raspberrypi/linux/issues/3108 - -Signed-off-by: Phil Elwell <phil@raspberrypi.org> ---- - .../net/ethernet/broadcom/genet/bcmgenet.c | 22 +++++++++++++++++++ - 1 file changed, 22 insertions(+) - ---- a/drivers/net/ethernet/broadcom/genet/bcmgenet.c -+++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.c -@@ -72,6 +72,10 @@ - #define GENET_RDMA_REG_OFF (priv->hw_params->rdma_offset + \ - TOTAL_DESC * DMA_DESC_SIZE) - -+static bool force_reneg = false; -+module_param(force_reneg, bool, 0444); -+MODULE_PARM_DESC(force_reneg, "Force a renegotiation after the initial link-up"); -+ - static inline void bcmgenet_writel(u32 value, void __iomem *offset) - { - /* MIPS chips strapped for BE will automagically configure the -@@ -2610,6 +2614,7 @@ static void bcmgenet_irq_task(struct wor - unsigned int status; - struct bcmgenet_priv *priv = container_of( - work, struct bcmgenet_priv, bcmgenet_irq_work); -+ static int first_link = 1; - - netif_dbg(priv, intr, priv->dev, "%s\n", __func__); - -@@ -2622,6 +2627,23 @@ static void bcmgenet_irq_task(struct wor - if (status & UMAC_IRQ_LINK_EVENT) { - priv->dev->phydev->link = !!(status & UMAC_IRQ_LINK_UP); - phy_mac_interrupt(priv->dev->phydev); -+ -+ if (priv->dev->phydev->link && first_link) { -+ first_link = 0; -+ /* -+ * HACK: Some Pi4Bs, when paired with some switches, -+ * come up in a strange state where they are unable to -+ * transmit, causing them to fail to get an IP address. -+ * Although the failure mechanism is not yet understood, -+ * forcing renegotiation at this point has been shown -+ * to be effective in avoiding the problem. -+ */ -+ if (force_reneg) { -+ dev_info(&priv->pdev->dev, -+ "Forcing renegotiation\n"); -+ genphy_restart_aneg(priv->dev->phydev); -+ } -+ } - } - } - |