Re: [PATCH] eeepc-laptop: fix wlan rfkill state change during init

[Corentin Chary <corentin.chary@gmail.com>]

On Sun, Mar 29, 2009 at 7:20 PM, Alan Jenkins
<alan-jenkins@tuffmail.co.uk> wrote:
> When an rfkill device is registered, the rfkill core will change its
> state to the system default. So we need to prepare for state changes
> *before* we register it. That means installing the eeepc-specific ACPI
> callback which handles the hotplug of the wireless network adaptor.
>
> This problem doesn't occur during normal operation.  You have to
>
> 1) Boot with wireless enabled. eeepc-laptop should load automatically.
> 2) modprobe -r eeepc-laptop
> 3) modprobe eeepc-laptop
>
> On boot, the default rfkill state will be set to enabled.
> With the current core code, step 2) will disable the wireless.
> Therefore in step 3), the wireless will change state during registration,
> from disabled to enabled.  But without this fix, the PCI device for the
> wireless adaptor will not appear.
>
> Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
>
> diff --git a/drivers/platform/x86/eeepc-laptop.c b/drivers/platform/x86/eeepc-laptop.c
> index 786ed86..b8951b9 100644
> --- a/drivers/platform/x86/eeepc-laptop.c
> +++ b/drivers/platform/x86/eeepc-laptop.c
> @@ -645,6 +645,9 @@ static int eeepc_hotk_add(struct acpi_device *device)
>        if (ACPI_FAILURE(status))
>                printk(EEEPC_ERR "Error installing notify handler\n");
>
> +       eeepc_register_rfkill_notifier("\\_SB.PCI0.P0P6");
> +       eeepc_register_rfkill_notifier("\\_SB.PCI0.P0P7");
> +
>        if (get_acpi(CM_ASL_WLAN) != -1) {
>                ehotk->eeepc_wlan_rfkill = rfkill_allocate(&device->dev,
>                                                           RFKILL_TYPE_WLAN);
> @@ -700,9 +703,6 @@ static int eeepc_hotk_add(struct acpi_device *device)
>                        goto bluetooth_fail;
>        }
>
> -       eeepc_register_rfkill_notifier("\\_SB.PCI0.P0P6");
> -       eeepc_register_rfkill_notifier("\\_SB.PCI0.P0P7");
> -
>        return 0;
>
>  bluetooth_fail:
>
>
>

Hi,
Cc'd linux-acpi to get more review about that.
I'm not very familiar with rfkill interface.


-- 
Corentin Chary
http://xf.iksaif.net
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