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Subject: Re: [PATCH] UBI: block: Use ENOSYS as return value when
 CONFIG_UBIBLOCK=n
From: Artem Bityutskiy <dedekind1@gmail.com>
To: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Date: Tue, 04 Mar 2014 13:49:51 +0200
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On Tue, 2014-03-04 at 07:57 -0300, Ezequiel Garcia wrote:
> In order to have a way of distinguishing an invalid ioctl from a
> not supported (but otherwise valid) ioctl, this commit changes the
> return value of the ioctl stubs from ENOTTY to ENOSYS.

Sounds logical, no objections, except it is curious if this is something
you invented or this is a general rule in the Linux kernel? If it is,
may be you can point to some discussions, or give some example or other
source of this knowledge? I just want to be educated a bit. Thanks!

-- 
Best Regards,
Artem Bityutskiy