Re: [PATCH net-next] net: phy: Deal with unbound PHY driver in phy_attached_print()

[David Miller]

From: Florian Fainelli <f.fainelli@xxxxxxxxx>
Date: Tue, 22 Aug 2017 14:26:47 -0700

> Priit reported that stmmac was crashing with the trace below. This is because
> phy_attached_print() is called too early right after the PHY device has been
> found, but before it has a driver attached, since that is only done in
> phy_probe() which occurs later.
> 
> Fix this by dealing with a possibly NULL phydev->drv point since that can
> happen here, but could also happen if we voluntarily did an unbind of the
> PHY device with the PHY driver.
 ...
> Tested-By: Priit Laes <plaes@xxxxxxxxx>
> Fixes: fbca164776e4 ("net: stmmac: Use the right logging function in stmmac_mdio_register")
> Signed-off-by: Florian Fainelli <f.fainelli@xxxxxxxxx>

"net-next"?  The commit which introduced this problem is in 'net', don't we want
to fix it there?