target/linux/generic/backport-6.1/715-18-v6.5-net-phylink-require-supported_interfaces-to-be-fille.patch

   1 From 441e1e44301fc5762a06737f8ec04bf1ce3fb039 Mon Sep 17 00:00:00 2001
   2 From: "Russell King (Oracle)" <rmk+kernel@armlinux.org.uk>
   3 Date: Sat, 20 May 2023 11:41:42 +0100
   4 Subject: [PATCH 16/21] net: phylink: require supported_interfaces to be filled
   5
   6 We have been requiring the supported_interfaces bitmap to be filled in
   7 by MAC drivers that have a mac_select_pcs() method. Now that all MAC
   8 drivers fill in the supported_interfaces bitmap, it is time to enforce
   9 this. We have already required supported_interfaces to be set in order
  10 for optical SFPs to be configured in commit f81fa96d8a6c ("net: phylink:
  11 use phy_interface_t bitmaps for optical modules").
  12
  13 Refuse phylink creation if supported_interfaces is empty, and remove
  14 code to deal with cases where this mask is empty.
  15
  16 Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
  17 Reviewed-by: Andrew Lunn <andrew@lunn.ch>
  18 Link: https://lore.kernel.org/r/E1q0K1u-006EIP-ET@rmk-PC.armlinux.org.uk
  19 Signed-off-by: Jakub Kicinski <kuba@kernel.org>
  20 ---
  21  drivers/net/phy/phylink.c | 26 +++++++++++---------------
  22  1 file changed, 11 insertions(+), 15 deletions(-)
  23
  24 --- a/drivers/net/phy/phylink.c
  25 +++ b/drivers/net/phy/phylink.c
  26 @@ -710,14 +710,11 @@ static int phylink_validate(struct phyli
  27  {
  28         const unsigned long *interfaces = pl->config->supported_interfaces;
  29
  30 -       if (!phy_interface_empty(interfaces)) {
  31 -               if (state->interface == PHY_INTERFACE_MODE_NA)
  32 -                       return phylink_validate_mask(pl, supported, state,
  33 -                                                    interfaces);
  34 +       if (state->interface == PHY_INTERFACE_MODE_NA)
  35 +               return phylink_validate_mask(pl, supported, state, interfaces);
  36
  37 -               if (!test_bit(state->interface, interfaces))
  38 -                       return -EINVAL;
  39 -       }
  40 +       if (!test_bit(state->interface, interfaces))
  41 +               return -EINVAL;
  42
  43         return phylink_validate_mac_and_pcs(pl, supported, state);
  44  }
  45 @@ -1512,19 +1509,18 @@ struct phylink *phylink_create(struct ph
  46         struct phylink *pl;
  47         int ret;
  48
  49 -       if (mac_ops->mac_select_pcs &&
  50 -           mac_ops->mac_select_pcs(config, PHY_INTERFACE_MODE_NA) !=
  51 -             ERR_PTR(-EOPNOTSUPP))
  52 -               using_mac_select_pcs = true;
  53 -
  54         /* Validate the supplied configuration */
  55 -       if (using_mac_select_pcs &&
  56 -           phy_interface_empty(config->supported_interfaces)) {
  57 +       if (phy_interface_empty(config->supported_interfaces)) {
  58                 dev_err(config->dev,
  59 -                       "phylink: error: empty supported_interfaces but mac_select_pcs() method present\n");
  60 +                       "phylink: error: empty supported_interfaces\n");
  61                 return ERR_PTR(-EINVAL);
  62         }
  63
  64 +       if (mac_ops->mac_select_pcs &&
  65 +           mac_ops->mac_select_pcs(config, PHY_INTERFACE_MODE_NA) !=
  66 +             ERR_PTR(-EOPNOTSUPP))
  67 +               using_mac_select_pcs = true;
  68 +
  69         pl = kzalloc(sizeof(*pl), GFP_KERNEL);
  70         if (!pl)
  71                 return ERR_PTR(-ENOMEM);