linux-kernel - Re: [PATCH 1/3 v2] Introduce a new acpi to determine HID match.

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Date:	Fri, 12 Oct 2012 11:26:26 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	Tang Chen <tangchen@...fujitsu.com>
Cc:	bhelgaas@...gle.com, lenb@...nel.org, jiang.liu@...wei.com,
	izumi.taku@...fujitsu.com, isimatu.yasuaki@...fujitsu.com,
	linux-acpi@...r.kernel.org, linux-pci@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3 v2] Introduce a new acpi to determine HID match.

On Fri, Oct 12, 2012 at 5:34 AM, Tang Chen <tangchen@...fujitsu.com> wrote:
> This introduce a new api to determine if a HID matches a list of IDs.
> Different from acpi_match_device_ids(), the new api gets HID from
> acpi_device_info struct.
>
> Signed-off-by: Tang Chen <tangchen@...fujitsu.com>
> ---
>  drivers/acpi/scan.c     |   24 ++++++++++++++++++++++++
>  include/acpi/acpi_bus.h |    2 ++
>  2 files changed, 26 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
> index 03c12e6..41fd4c9 100644
> --- a/drivers/acpi/scan.c
> +++ b/drivers/acpi/scan.c
> @@ -312,6 +312,30 @@ int acpi_match_device_ids(struct acpi_device *device,
>  }
>  EXPORT_SYMBOL(acpi_match_device_ids);
>
> +int acpi_match_object_info_ids(struct acpi_device_info *info,
> +                              const struct acpi_device_id *ids)
> +{
> +       char *hardware_id;
> +       int i, j;
> +
> +       for (i = 0; ids[i].id[0]; i++) {
> +               hardware_id = info->hardware_id.string;
> +               if (hardware_id &&
> +                   !strcmp((char *)ids[i].id, hardware_id))
> +                               return 0;
> +
> +               for (j = 0; j < info->compatible_id_list.count; j++) {
> +                       hardware_id = info->compatible_id_list.ids[j].string;
> +                       if (hardware_id &&
> +                           !strcmp((char *)ids[i].id, hardware_id))
> +                               return 0;
> +               }
> +       }
> +
> +       return 1;

-ENOENT instead of 1?

> +}
> +EXPORT_SYMBOL(acpi_match_object_info_ids);
> +
>  static void acpi_free_ids(struct acpi_device *device)
>  {
>         struct acpi_hardware_id *id, *tmp;
> diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
> index f0b9681..f83d581 100644
> --- a/include/acpi/acpi_bus.h
> +++ b/include/acpi/acpi_bus.h
> @@ -379,6 +379,8 @@ int acpi_bus_start(struct acpi_device *device);
>  acpi_status acpi_bus_get_ejd(acpi_handle handle, acpi_handle * ejd);
>  int acpi_match_device_ids(struct acpi_device *device,
>                           const struct acpi_device_id *ids);
> +int acpi_match_object_info_ids(struct acpi_device_info *info,
> +                              const struct acpi_device_id *ids);
>  int acpi_create_dir(struct acpi_device *);
>  void acpi_remove_dir(struct acpi_device *);
>
> --
> 1.7.1
>
> --
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