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net: phylink: explicitly invalidate link_state members in mac_config

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Explicitly invalidate the phylink_link_state structure members in
mac_config that do not contain reliable information for this function,
thereby preventing their future incorrect use.

Reviewed-by: Daniel Golle <daniel@makrotopia.org>
Tested-by: Daniel Golle <daniel@makrotopia.org>
Tested-by: Frank Wunderlich <frank-w@public-files.de>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Russell King (Oracle) 2023-07-22 21:33:05 +01:00 committed by Paolo Abeni
parent 4d72c3bb60
commit c5714f68a7
1 changed files with 17 additions and 10 deletions
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27
drivers/net/phy/phylink.c
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@ -1066,17 +1066,24 @@ static void phylink_pcs_poll_start(struct phylink *pl)
static void phylink_mac_config(struct phylink *pl,
const struct phylink_link_state *state)
{
phylink_dbg(pl,
"%s: mode=%s/%s/%s/%s/%s adv=%*pb pause=%02x link=%u\n",
__func__, phylink_an_mode_str(pl->cur_link_an_mode),
phy_modes(state->interface),
phy_speed_to_str(state->speed),
phy_duplex_to_str(state->duplex),
phy_rate_matching_to_str(state->rate_matching),
__ETHTOOL_LINK_MODE_MASK_NBITS, state->advertising,
state->pause, state->link);
struct phylink_link_state st = *state;
pl->mac_ops->mac_config(pl->config, pl->cur_link_an_mode, state);
/* Stop drivers incorrectly using these */
linkmode_zero(st.lp_advertising);
st.speed = SPEED_UNKNOWN;
st.duplex = DUPLEX_UNKNOWN;
st.an_complete = false;
st.link = false;
phylink_dbg(pl,
"%s: mode=%s/%s/%s adv=%*pb pause=%02x\n",
__func__, phylink_an_mode_str(pl->cur_link_an_mode),
phy_modes(st.interface),
phy_rate_matching_to_str(st.rate_matching),
__ETHTOOL_LINK_MODE_MASK_NBITS, st.advertising,
st.pause);
pl->mac_ops->mac_config(pl->config, pl->cur_link_an_mode, &st);
}
static void phylink_pcs_an_restart(struct phylink *pl)