Re: [PATCH 1/2] dell-wmi - properly handle errors returned by wmi_install_notify_handler()

Paul Rolland
2009-12-29T09:08:51Z

Hello,

On Tue, 29 Dec 2009 00:34:14 -0800
Dmitry Torokhov <dmitry.torokhov@gmail.com> wrote:

> wmi_install_notify_handler() retruns ACPI error codes instead of standard
> Exxxx error codes and they should not be propagated unchanged to the upper
> layers.
>
> Reported-by: Paul Rolland <rol@as2917.net>
> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Tested-by: Paul Rolland <rol@as2917.net>

This is causing :
[root@tux ~]# modprobe dell-wmi
FATAL: Error inserting dell_wmi (/lib/modules/2.6.33-rc2/kernel/drivers/platform/x86/dell-wmi.ko): Input/output error

and

Dec 29 09:54:54 tux kernel: ACPI: WMI: Mapper loaded
Dec 29 09:54:54 tux kernel: input: Dell WMI hotkeys as /devices/virtual/input/input13
Dec 29 09:54:54 tux kernel: dell-wmi: Unable to register notify handler - 6

which looks Ok as my machine doesn't seem to have the corresponding stuff.

Anyway, this still needs the changes I sent for wmi.c to avoid the Oops.

Paul

> ---
>
> drivers/platform/x86/dell-wmi.c | 11 ++++++-----
> 1 files changed, 6 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/platform/x86/dell-wmi.c
> b/drivers/platform/x86/dell-wmi.c index ff67a78..79bb1f1 100644
> --- a/drivers/platform/x86/dell-wmi.c
> +++ b/drivers/platform/x86/dell-wmi.c
> @@ -265,6 +265,7 @@ static void __init find_hk_type(const struct
> dmi_header *dm, void *dummy)
> static int __init dell_wmi_init(void)
> {
> + acpi_status status;
> int err;
>
> if (!wmi_has_guid(DELL_EVENT_GUID)) {
> @@ -279,12 +280,12 @@ static int __init dell_wmi_init(void)
> if (err)
> return err;
>
> - err = wmi_install_notify_handler(DELL_EVENT_GUID,
> - dell_wmi_notify, NULL);
> - if (err) {
> + status = wmi_install_notify_handler(DELL_EVENT_GUID,
> + dell_wmi_notify, NULL);
> + if (!ACPI_SUCCESS(status)) {
> dell_wmi_input_destroy();
> - pr_err("Unable to register notify handler - %d\n", err);
> - return err;
> + pr_err("Unable to register notify handler - %d\n",
> status);
> + return -EIO;
> }
>
> return 0;
>

--
Paul Rolland E-Mail : rol(at)witbe.net
CTO - Witbe.net SA Tel. +33 (0)1 47 67 77 77
Les Collines de l'Arche Fax. +33 (0)1 47 67 77 99
F-92057 Paris La Defense RIPE : PR12-RIPE

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