target/linux/generic/backport-6.1/715-11-v6.4-net-phylink-support-validated-pause-and-autoneg-in-f.patch

   1 From 471c40bde606ec0b1ce8c616f7998739c7a783a6 Mon Sep 17 00:00:00 2001
   2 From: Ivan Bornyakov <i.bornyakov@metrotek.ru>
   3 Date: Fri, 10 Feb 2023 18:46:27 +0300
   4 Subject: [PATCH 10/21] net: phylink: support validated pause and autoneg in
   5  fixed-link
   6
   7 In fixed-link setup phylink_parse_fixedlink() unconditionally sets
   8 Pause, Asym_Pause and Autoneg bits to "supported" bitmap, while MAC may
   9 not support these.
  10
  11 This leads to ethtool reporting:
  12
  13  > Supported pause frame use: Symmetric Receive-only
  14  > Supports auto-negotiation: Yes
  15
  16 regardless of what is actually supported.
  17
  18 Instead of unconditionally set Pause, Asym_Pause and Autoneg it is
  19 sensible to set them according to validated "supported" bitmap, i.e. the
  20 result of phylink_validate().
  21
  22 Signed-off-by: Ivan Bornyakov <i.bornyakov@metrotek.ru>
  23 Signed-off-by: David S. Miller <davem@davemloft.net>
  24 ---
  25  drivers/net/phy/phylink.c | 17 ++++++++++++++---
  26  1 file changed, 14 insertions(+), 3 deletions(-)
  27
  28 --- a/drivers/net/phy/phylink.c
  29 +++ b/drivers/net/phy/phylink.c
  30 @@ -709,6 +709,7 @@ static int phylink_parse_fixedlink(struc
  31                                    struct fwnode_handle *fwnode)
  32  {
  33         struct fwnode_handle *fixed_node;
  34 +       bool pause, asym_pause, autoneg;
  35         const struct phy_setting *s;
  36         struct gpio_desc *desc;
  37         u32 speed;
  38 @@ -781,13 +782,23 @@ static int phylink_parse_fixedlink(struc
  39         linkmode_copy(pl->link_config.advertising, pl->supported);
  40         phylink_validate(pl, pl->supported, &pl->link_config);
  41
  42 +       pause = phylink_test(pl->supported, Pause);
  43 +       asym_pause = phylink_test(pl->supported, Asym_Pause);
  44 +       autoneg = phylink_test(pl->supported, Autoneg);
  45         s = phy_lookup_setting(pl->link_config.speed, pl->link_config.duplex,
  46                                pl->supported, true);
  47         linkmode_zero(pl->supported);
  48         phylink_set(pl->supported, MII);
  49 -       phylink_set(pl->supported, Pause);
  50 -       phylink_set(pl->supported, Asym_Pause);
  51 -       phylink_set(pl->supported, Autoneg);
  52 +
  53 +       if (pause)
  54 +               phylink_set(pl->supported, Pause);
  55 +
  56 +       if (asym_pause)
  57 +               phylink_set(pl->supported, Asym_Pause);
  58 +
  59 +       if (autoneg)
  60 +               phylink_set(pl->supported, Autoneg);
  61 +
  62         if (s) {
  63                 __set_bit(s->bit, pl->supported);
  64                 __set_bit(s->bit, pl->link_config.lp_advertising);