Driver-specific ioctls

[Gavin Lambert]

I came across a situation the other day where I wanted to get some more
esoteric data from an MTD chip driver into userspace (mostly for
debugging purposes).  Sadly (at least in 2.6.15) mtdchar doesn't pass
any unrecognised ioctls to the MTD driver, which seems like the cleanest
way to do that sort of thing.

Any chance that this could get added?  Or is there a similar mechanism
already that I have somehow missed?