tree 8afb0fdd3ae4c87d9cd880e1e137eff2fb8f9efd
parent 0649be554841f85106c5e3b6607f533e49ed987b
author Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com> 1562957898 +0200
committer Joe Hershberger <joe.hershberger@ni.com> 1563485833 -0500

cmd: mdio: prevent data abort when no mdio bus is found

Calling 'mdio read ...' currently leads to a data abort when no mdio
bus is found.

To fix this, check if 'bus' is a valid pointer before accessing it.

Signed-off-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>
Tested-by: Vladimir Oltean <olteanv@gmail.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>