Ack: [trusty] dell-laptop: Only install the i8042 filter when rfkill is active

[Seth Forshee]

On Thu, Jun 19, 2014 at 04:16:01PM +0800, Yidi Lin wrote:
> BugLink: https://bugs.launchpad.net/bugs/1289238
> 
> Bug report only mentions linux-lts-saucy. But this bug also affects
> trusty kernel.
> For saucy kernel, the bug is fixed by "ACPI: blacklist win8 OSI for
> Dell Inspiron 7737".
> 
> For trusty kernel, this patch should also be applied.
> The rfkill functionality is only enabled on some specific models after
> Linux 3.13-rc2.
> This patch avoids troublesome rfkill query when hotkey gets pressed on
> non whitelisted laptops.
> 
> commit 97f440c23f2b02fac8af0558cba9ca0bed603794
> Author: Hans de Goede <hdegoede at redhat.com>
> Date:   Tue Dec 24 20:34:01 2013 +0100
> 
>     dell-laptop: Only install the i8042 filter when rfkill is active
> 
>     Installing the i8042 filter is not useful on machines where rfkill is not
>     whitelisted, so move the filter installation into dell_setup_rfkill,
>     after the whitelist check.
> 
>     This avoids doing a needless and potentially troublesome rfkill query
>     (dell_send_request(buf, 17, 11)) when the wireless Fn key gets pressed on
>     non whitelisted laptops.
> 
>     This patch was written as a result of:
>     https://bugzilla.redhat.com/show_bug.cgi?id=1045807
>     It is not yet clear if this is related, but it is a good idea to
> not register
>     the i8042 filter in general.
> 
>     Signed-off-by: Hans de Goede <hdegoede at redhat.com>
>     Signed-off-by: Matthew Garrett <matthew.garrett at nebula.com>

This has been upstream a while now and seems reasonable enough, so it
looks okay to me.