linux-kernel - Re: BUG? Duplicate key code 0xe045 in dell-wmi.c

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Date:	Tue, 07 Jul 2015 13:38:41 -0500
From:	Mario Limonciello <mario_limonciello@...l.com>
To:	Pali Rohár <pali.rohar@...il.com>,
	Matthew Garrett <mjg@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Len Brown <len.brown@...el.com>,
	"platform-driver-x86@...r.kernel.org" 
	<platform-driver-x86@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:	Gabriele Mazzotta <gabriele.mzt@...il.com>,
	Michał Kępień 
	<kernel@...pniu.pl>
Subject: Re: BUG? Duplicate key code 0xe045 in dell-wmi.c



On 07/04/2015 11:34 AM, Pali Rohár wrote:
> Hello,
>
> I'm looking at dell-wmi.c driver and its history in git and I found 
> problem with handling WMI key code 0xe045. In current dell-wmi.c code is
>
> {KE_KEY, 0xe045, KEY_PROG1},
> {KE_IGNORE, 0xe045, KEY_NUMLOCK},
>
> I bet this is some copy-paste error as one code can be translated only 
> to one input key event.
>
> In git history I found that above change was added by commit:
>
> http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=5cab0098171712a9fd51399b06181c8dfdebe9c9
>
> ===============================================
> commit 5cab0098171712a9fd51399b06181c8dfdebe9c9
> Author: Mario Limonciello <mario_limonciello@...l.com>
> Date:   Wed Jun 10 19:40:47 2009 +0000
>
>     dell-wmi: add additional keyboard events
>     
>     Upcoming Dell hardware will send more keyboard events via WMI.  Add
>     support for them.
>     
>     Signed-off-by: Mario Limonciello <mario_limonciello@...l.com>
>     Signed-off-by: Matthew Garrett <mjg@...hat.com>
>     Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
>     Signed-off-by: Len Brown <len.brown@...el.com>
> ===============================================
>
> Sending email to all signers of this commit. Problematic code is still 
> in upstream kernel, so it needs to be fixed.
>
> Mario Limonciello: Do you know if code 0xe045 is some PROG1 or NUMLOCK?
>
Hi Pali,

Yes this looks like a mistake and that the KEY_PROG1 item should have
been removed in that patch.  It should be a notification (KEY_IGNORE)
for numlock.

Thanks,
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