linux-kernel - Re: regression since 2.6.36: backlight in sony-laptop not working

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Date:	Thu, 18 Nov 2010 10:06:24 -0800
From:	Dmitry Torokhov <dmitry.torokhov@...il.com>
To:	Mattia Dongili <malattia@...ux.it>
Cc:	Norbert Preining <preining@...ic.at>,
	Matthew Garrett <mjg@...hat.com>, linux-kernel@...r.kernel.org,
	ACPI Devel Mailing List <linux-acpi@...r.kernel.org>,
	Mauro Carvalho Chehab <mchehab@...hat.com>,
	linux-input@...r.kernel.org
Subject: Re: regression since 2.6.36: backlight in sony-laptop not working

On Thu, Nov 18, 2010 at 10:34:20PM +0900, Mattia Dongili wrote:
> On Thu, Nov 18, 2010 at 08:04:45PM +0900, Mattia Dongili wrote:
> > On Tue, Nov 16, 2010 at 10:52:52PM -0800, Dmitry Torokhov wrote:
> > > On Wed, Nov 17, 2010 at 03:33:38PM +0900, Norbert Preining wrote:
> > > > > - recompiled a input-kbd binary with a relaxed version check
> > > > > 	-	if (EV_VERSION != version) {
> > > > > 	+	if (EV_VERSION > version) {
> > > > >   in input.c, line 104 of input-utils.
> > > > 
> > > > Furthermore, although both of you referred to the fact that udev keymap
> > > > is working, I checked that Debian/sid uses udev kbd rules, but it 
> > > > stopped working ...
> > > > 
> > > 
> > > Seems to be working here (I also verified that the keycodces are
> > > actually emitted with evtest):
> > > 
> > > [root@...r-d630 ~]# /lib/udev/keymap /dev/input/event3 0x87 wlan
> > > setting scancode 0x87 to key code 238
> > > [root@...r-d630 ~]# /lib/udev/keymap /dev/input/event3 0x87 battery
> > > setting scancode 0x87 to key code 236
> > > [root@...r-d630 ~]# uname -r
> > > 2.6.37-rc1+
> > > [root@...r-d630 ~]# 
> > 
> > ok I got the error. I'll see why the EVIOCSKEYCODE syscall is returning
> > -EINVAL.
> 
> there is a typo in the large scancode support patch. This patch makes 
> /lib/udev/keymap work again here on 2.6.37-rc2.
> 

Applied, thanks Mattia.

> commit a33950b5baa848ff7851b9efd4c5e2eaafd370f2
> Author: Mattia Dongili <malattia@...ux.it>
> Date:   Thu Nov 18 22:20:36 2010 +0900
> 
>     Input: fix typo in keycode validation supporting large scancodes
>     
>     Check the input_keymap_entry keycode size (u32) instead of the device's
>     (void*).
>     Fixes: https://bugzilla.kernel.org/show_bug.cgi?id=22722
>     
>     Cc: Mauro Carvalho Chehab <mchehab@...hat.com>
>     Cc: Dmitry Torokhov <dtor@...l.ru>
>     Signed-off-by: Mattia Dongili <malattia@...ux.it>
> 
> diff --git a/drivers/input/input.c b/drivers/input/input.c
> index 7f26ca6..5edc41a 100644
> --- a/drivers/input/input.c
> +++ b/drivers/input/input.c
> @@ -753,7 +753,7 @@ static int input_default_setkeycode(struct input_dev *dev,
>  	if (index >= dev->keycodemax)
>  		return -EINVAL;
>  
> -	if (dev->keycodesize < sizeof(dev->keycode) &&
> +	if (dev->keycodesize < sizeof(ke->keycode) &&
>  			(ke->keycode >> (dev->keycodesize * 8)))
>  		return -EINVAL;
>  
> -- 
> mattia
> :wq!

-- 
Dmitry
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