diff options
| author |   Vladimir Oltean <olteanv@gmail.com> | 2019-06-28 00:46:35 +0300 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2019-06-28 09:31:31 -0700 |
| commit | a979a0ab3687f701ef3a8223cbb56ce993a767fb (patch) | |
| tree | f8cfa74e5a0fb8a1b249e9ef37e5286096df2bc0 /drivers/net/dsa | |
| parent | hinic: reduce rss_init stack usage (diff) | |
| download | linux-dev-a979a0ab3687f701ef3a8223cbb56ce993a767fb.tar.xz linux-dev-a979a0ab3687f701ef3a8223cbb56ce993a767fb.zip | |
net: dsa: sja1105: Don't check state->link in phylink_mac_config
It has been pointed out that PHYLINK can call mac_config only to update
the phy_interface_type and without knowing what the AN results are.
Experimentally, when this was observed to happen, state->link was also
unset, and therefore was used as a proxy to ignore this call. However it
is also suggested that state->link is undefined for this callback and
should not be relied upon.
So let the previously-dead codepath for SPEED_UNKNOWN be called, and
update the comment to make sure the MAC's behavior is sane.
Cc: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/dsa')
| -rw-r--r-- | drivers/net/dsa/sja1105/sja1105_main.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/drivers/net/dsa/sja1105/sja1105_main.c b/drivers/net/dsa/sja1105/sja1105_main.c index caebf76eaa3e..da1736093b06 100644 --- a/drivers/net/dsa/sja1105/sja1105_main.c +++ b/drivers/net/dsa/sja1105/sja1105_main.c @@ -715,7 +715,13 @@ static int sja1105_adjust_port_config(struct sja1105_private *priv, int port, switch (speed_mbps) { case SPEED_UNKNOWN: - /* No speed update requested */ + /* PHYLINK called sja1105_mac_config() to inform us about + * the state->interface, but AN has not completed and the + * speed is not yet valid. UM10944.pdf says that setting + * SJA1105_SPEED_AUTO at runtime disables the port, so that is + * ok for power consumption in case AN will never complete - + * otherwise PHYLINK should come back with a new update. + */ speed = SJA1105_SPEED_AUTO; break; case SPEED_10: @@ -766,9 +772,6 @@ static void sja1105_mac_config(struct dsa_switch *ds, int port, { struct sja1105_private *priv = ds->priv; - if (!state->link) - return; - sja1105_adjust_port_config(priv, port, state->speed); } |