target/linux/bcm4908/patches-5.10/075-v5.13-0006-net-dsa-bcm_sf2-Fix-bcm_sf2_reg_rgmii_cntrl-call-for.patch

   1 From fc516d3a6aa2c6ffe27d0da8818d13839e023e7e Mon Sep 17 00:00:00 2001
   2 From: Florian Fainelli <f.fainelli@gmail.com>
   3 Date: Fri, 21 May 2021 10:46:14 -0700
   4 Subject: [PATCH] net: dsa: bcm_sf2: Fix bcm_sf2_reg_rgmii_cntrl() call for
   5  non-RGMII port
   6 MIME-Version: 1.0
   7 Content-Type: text/plain; charset=UTF-8
   8 Content-Transfer-Encoding: 8bit
   9
  10 We cannot call bcm_sf2_reg_rgmii_cntrl() for a port that is not RGMII,
  11 yet we do that in bcm_sf2_sw_mac_link_up() irrespective of the port's
  12 interface. Move that read until we have properly qualified the PHY
  13 interface mode. This avoids triggering a warning on 7278 platforms that
  14 have GMII ports.
  15
  16 Fixes: 55cfeb396965 ("net: dsa: bcm_sf2: add function finding RGMII register")
  17 Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
  18 Acked-by: Rafał Miłecki <rafal@milecki.pl>
  19 Signed-off-by: David S. Miller <davem@davemloft.net>
  20 ---
  21  drivers/net/dsa/bcm_sf2.c | 5 ++---
  22  1 file changed, 2 insertions(+), 3 deletions(-)
  23
  24 --- a/drivers/net/dsa/bcm_sf2.c
  25 +++ b/drivers/net/dsa/bcm_sf2.c
  26 @@ -827,11 +827,9 @@ static void bcm_sf2_sw_mac_link_up(struc
  27         bcm_sf2_sw_mac_link_set(ds, port, interface, true);
  28
  29         if (port != core_readl(priv, CORE_IMP0_PRT_ID)) {
  30 -               u32 reg_rgmii_ctrl;
  31 +               u32 reg_rgmii_ctrl = 0;
  32                 u32 reg, offset;
  33
  34 -               reg_rgmii_ctrl = bcm_sf2_reg_rgmii_cntrl(priv, port);
  35 -
  36                 if (priv->type == BCM4908_DEVICE_ID ||
  37                     priv->type == BCM7445_DEVICE_ID)
  38                         offset = CORE_STS_OVERRIDE_GMIIP_PORT(port);
  39 @@ -842,6 +840,7 @@ static void bcm_sf2_sw_mac_link_up(struc
  40                     interface == PHY_INTERFACE_MODE_RGMII_TXID ||
  41                     interface == PHY_INTERFACE_MODE_MII ||
  42                     interface == PHY_INTERFACE_MODE_REVMII) {
  43 +                       reg_rgmii_ctrl = bcm_sf2_reg_rgmii_cntrl(priv, port);
  44                         reg = reg_readl(priv, reg_rgmii_ctrl);
  45                         reg &= ~(RX_PAUSE_EN | TX_PAUSE_EN);
  46