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SubjectRe: ENOIOCTLCMD?
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> That's what's confusing me: why the distinction? It's true that the 
> current scheme allows the dev->ioctlfunc() call below to force ENOTTY
> to be returned, bypassing the switch, but presumably that's not what
> one wants.

It allows driver specific code to override generic code, including by reporting
that a given feature is not available/appropriate.

Alan

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