[PATCH] net: phy: marvell: fix Marvell 88E1512 used in SGMII mode

[Florian Fainelli]

On 01/10/2017 03:13 PM, Russell King wrote:
> When an Marvell 88E1512 PHY is connected to a nic in SGMII mode, the
> fiber page is used for the SGMII host-side connection.  The PHY driver
> notices that SUPPORTED_FIBRE is set, so it tries reading the fiber page
> for the link status, and ends up reading the MAC-side status instead of
> the outgoing (copper) link.  This leads to incorrect results reported
> via ethtool.
> 
> If the PHY is connected via SGMII to the host, ignore the fiber page.
> However, continue to allow the existing power management code to
> suspend and resume the fiber page.
> 
> Signed-off-by: Russell King <rmk+kernel at armlinux.org.uk>

Fixes: 6cfb3bcc0641 ("Marvell phy: check link status in case of fiber
link.")
-- 
Florian