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net: dsa: loop: Do not unregister invalid fixed PHY 

During error injection it was possible to crash in dsa_loop_exit() because of
an attempt to unregister an invalid PHY. We actually want to the driver probing
in dsa_loop_init() even though fixed_phy_register() may return an error to
exercise how DSA deals with such cases, but we should not be crashing during
driver removal.

Fixes: 98cd1552ea ("net: dsa: Mock-up driver")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Florian Fainelli 2017-09-02 08:56:45 -07:00 committed by David S. Miller
parent 443cb3a321
commit 6d9c153a0b
1 changed files with 1 additions and 1 deletions
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2
drivers/net/dsa/dsa_loop.c
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@ -390,7 +390,7 @@ static void __exit dsa_loop_exit(void)
mdio_driver_unregister(&dsa_loop_drv);
for (i = 0; i < NUM_FIXED_PHYS; i++)
if (phydevs[i])
if (!IS_ERR(phydevs[i]))
fixed_phy_unregister(phydevs[i]);
}
module_exit(dsa_loop_exit);