linux-kernel - Re: Dell Studio 1555 eject key does not work ( small patch to fix included )

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Message-ID: <20100602213429.GA14866@srcf.ucam.org>
Date:	Wed, 2 Jun 2010 22:34:29 +0100
From:	Matthew Garrett <mjg59@...f.ucam.org>
To:	Islam Amer <pharon@...il.com>
Cc:	linux-kernel@...r.kernel.org, platform-driver-x86@...r.kernel.org,
	akpm@...ux-foundation.org, Rezwanul_Kabir@...l.com
Subject: Re: Dell Studio 1555 eject key does not work ( small patch to fix
	included )

Hi Rez,

Any thoughts on this?

On Thu, Jun 03, 2010 at 01:14:09AM +0400, Islam Amer wrote
> Hello,
> 
> Pressing the eject key on my Dell Studio 1555 does not work and dmesg produces
> this message :
> dell-wmi: Unknown key 0 pressed
> 
> Adding a debugging printk in dell-wmi.c after line 222 like this :
> 
> printk(KERN_INFO "dell:wmi 0x%x , 0x%x \n", buffer_entry[1], buffer_entry[2]);
> 
> dmesg now shows :
> 
> dell:wmi 0x0 , 0xe009
> dell-wmi: Unknown key 0 pressed
> 
> So for some reason buffer_entry[1] is used although it is empty.
> 
> Falling back to buffer_entry[2] in case buffer_entry[1] is 0x0 makes
> the button work.
> 
> I suspect it might be better to fix the "dell_new_hk_type" logic though
> 
> I had submitted this as
> https://bugzilla.kernel.org/show_bug.cgi?id=16075 but repeating the
> information and patch
> here as per Andrew Morton's suggestion.
> 
> 
> Thanks.
> 
> --- linux-sidux-2.6-2.6.34/drivers/platform/x86/dell-wmi.c.orig	2010-06-03
> 01:02:17.418824168 +0400
> +++ linux-sidux-2.6-2.6.34/drivers/platform/x86/dell-wmi.c	2010-06-03
> 01:01:40.641833249 +0400
> @@ -221,7 +221,7 @@ static void dell_wmi_notify(u32 value, v
>  			return;
>  		}
> 
> -		if (dell_new_hk_type)
> +		if (dell_new_hk_type || buffer_entry[1] == 0x0)
>  			reported_key = (int)buffer_entry[2];
>  		else
>  			reported_key = (int)buffer_entry[1] & 0xffff;
> 
-- 
Matthew Garrett | mjg59@...f.ucam.org
--
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