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net: dsa: sja1105: fix SGMII PCS being forced to SPEED_UNKNOWN instead of SPEED_10

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commit 053d8ad10d upstream.

When using MLO_AN_PHY or MLO_AN_FIXED, the MII_BMCR of the SGMII PCS is
read before resetting the switch so it can be reprogrammed afterwards.
This works for the speeds of 1Gbps and 100Mbps, but not for 10Mbps,
because SPEED_10 is actually 0, so AND-ing anything with 0 is false,
therefore that last branch is dead code.

Do what others do (genphy_read_status_fixed, phy_mii_ioctl) and just
remove the check for SPEED_10, let it fall into the default case.

Fixes: ffe10e679c ("net: dsa: sja1105: Add support for the SGMII port")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Vladimir Oltean
2021-03-04 12:56:53 +02:00
committed by Greg Kroah-Hartman
parent 719611e806
commit 565b2d3ae2
1 changed files with 1 additions and 1 deletions
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2
drivers/net/dsa/sja1105/sja1105_main.c
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@@ -1834,7 +1834,7 @@ out_unlock_ptp:
speed = SPEED_1000;
else if (bmcr & BMCR_SPEED100)
speed = SPEED_100;
else if (bmcr & BMCR_SPEED10)
else
speed = SPEED_10;
sja1105_sgmii_pcs_force_speed(priv, speed);