linux-kernel - Re: [PATCH v3 2/3] dell-rbtn: Export notifier for other kernel modules

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Message-ID: <CAKdAkRRHZc3qk=gz7_KUwCNJup54gAjdmFn+V0=hQJ-bqkrWsA@mail.gmail.com>
Date:	Fri, 22 May 2015 15:45:57 -0700
From:	Dmitry Torokhov <dmitry.torokhov@...il.com>
To:	Pali Rohár <pali.rohar@...il.com>
Cc:	Darren Hart <dvhart@...radead.org>,
	platform-driver-x86@...r.kernel.org,
	lkml <linux-kernel@...r.kernel.org>,
	Gabriele Mazzotta <gabriele.mzt@...il.com>,
	Alex Hung <alex.hung@...onical.com>,
	Matthew Garrett <mjg59@...f.ucam.org>,
	Darren Hart <dvhart@...ux.intel.com>
Subject: Re: [PATCH v3 2/3] dell-rbtn: Export notifier for other kernel modules

On Thu, May 14, 2015 at 3:54 AM, Pali Rohár <pali.rohar@...il.com> wrote:

> @@ -328,7 +408,9 @@ static void rbtn_notify(struct acpi_device *device, u32 event)
>
>  static int __init rbtn_init(void)
>  {
> -       return acpi_bus_register_driver(&rbtn_driver);
> +       /* ignore errors so module always loads and exports needed functions */
> +       acpi_bus_register_driver(&rbtn_driver);
> +       return 0;

Ahem, and if it fails for some reason and you try to unload the module
what will happen when you call
acpi_bus_unregister_driver(&rbtn_driver) in rbtn_exit()?\

Thanks.

-- 
Dmitry
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