[PATCH] Fix I2O config-osm init to return proper error

We currently unregister the config-osm driver if initialization of the
legacy ioctl() handlers failed but still return success.  We should be
returning -EBUSY in this case.

Signed-off-by: Deepak Saxena <dsaxena@plexity.net>
Cc: Markus Lidel <Markus.Lidel@shadowconnect.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>