linux-kernel - Re: [PATCH v1] ESIA : Dummy eisa_driver

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Date:	Mon, 18 Jul 2016 21:31:52 -0700
From:	Christoph Hellwig <hch@...radead.org>
To:	Arvind Yadav <arvind.yadav.cs@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1] ESIA : Dummy eisa_driver_register should return error
 code

On Tue, Jul 19, 2016 at 12:15:01AM +0530, Arvind Yadav wrote:
> The inline eisa_driver_register stub simply allows compilation on
> systems with CONFIG_EISA disabled. the dummy eisa_driver_register
> does not register an *_eisa_driver at all. The inline
> eisa_driver_register should return to indicate lack of support
> when attempting to register an *_eisa_driver on such a system with
> CONFIG_EISA disabled.

Why?  The idea is that you can simply leave the stub in if registering
say PCI / EISA.  With your change such a driver will fail to load even
if it could serve PCI device in a !CONFIG_EISA config, which is the
behavior we want.