From: Li Yang <redacted>
Date: Tue, 28 Apr 2009 19:08:13 +0800

IMHO, when device_add() fails the system is quite broken.  So the
value is very limited for it to fail cleanly, which need some effort
to implement.  I can add it if you insist.

I disagree.

For the cases where device_add() fails (duplicate name, for
example) the device layer already is emitting warnings.

You're just adding more log messages for the user to sift
through, and likely not adding any new information.