Ariff Abdullah a5b0e31251 Be much more forgiving towards applications that requesting ioctls
that should be a no-op (for example, requesting SYNC on record path).
The standards does not indicate that such requests are illegal, so
just return it as success instead of EINVAL.

Approved by:	re (mux)
2007-07-04 12:33:11 +00:00
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