tree 00fbdf2d770ddb4e3cd22bcafe83a50db7cf9fc9
parent e844e5d9080604f1dab04f8f285c41335b6373bd
author Sean Anderson <sean.anderson@seco.com> 1651770696 -0400
committer Tom Rini <trini@konsulko.com> 1654711193 -0400

net: dsa: Fix segmentation fault if master fails to probe

If the DSA master fails to probe for whatever reason, then DSA devices
will continue on as if nothing is wrong. This can cause incorrect
behavior. In particular, on sandbox, dsa_sandbox_probe attempts to
access the master's private data. This is only safe to do if the master
has been probed first. Fix this by probing the master after we look it
up, and bailing out if we get an error.

Fixes: fc054d563b ("net: Introduce DSA class for Ethernet switches")
Signed-off-by: Sean Anderson <sean.anderson@seco.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>