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SubjectRe: [PATCH net-next] net: phy: Deal with unbound PHY driver in phy_attached_print()
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From: Florian Fainelli <f.fainelli@gmail.com>
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@plaes.org>
> Fixes: fbca164776e4 ("net: stmmac: Use the right logging function in stmmac_mdio_register")
> Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>

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

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