linux-kernel - Re: [PATCH] ACPI: dock: Remove redundant ACPI NS walk

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Date:	Tue, 09 Oct 2012 07:46:25 -0600
From:	Toshi Kani <toshi.kani@...com>
To:	linux-acpi@...r.kernel.org
Cc:	lenb@...nel.org, linux-kernel@...r.kernel.org, shli@...ionio.com
Subject: Re: [PATCH] ACPI: dock: Remove redundant ACPI NS walk

Hi Len,

Can you please review this patch?  Please let me know if there is
anything I need to do for 3.7.

Thanks,
-Toshi


On Wed, 2012-09-12 at 14:30 -0600, Toshi Kani wrote:
> Combined two ACPI namespace walks, which look for dock stations
> and then bays separately, into a single walk.
> 
> Signed-off-by: Toshi Kani <toshi.kani@...com>
> ---
>  drivers/acpi/dock.c |   26 +++++++-------------------
>  1 files changed, 7 insertions(+), 19 deletions(-)
> 
> diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c
> index 88eb143..ae4ebf2 100644
> --- a/drivers/acpi/dock.c
> +++ b/drivers/acpi/dock.c
> @@ -1016,44 +1016,32 @@ static int dock_remove(struct dock_station *ds)
>  }
>  
>  /**
> - * find_dock - look for a dock station
> + * find_dock_and_bay - look for dock stations and bays
>   * @handle: acpi handle of a device
>   * @lvl: unused
> - * @context: counter of dock stations found
> + * @context: unused
>   * @rv: unused
>   *
> - * This is called by acpi_walk_namespace to look for dock stations.
> + * This is called by acpi_walk_namespace to look for dock stations and bays.
>   */
>  static __init acpi_status
> -find_dock(acpi_handle handle, u32 lvl, void *context, void **rv)
> +find_dock_and_bay(acpi_handle handle, u32 lvl, void *context, void **rv)
>  {
> -	if (is_dock(handle))
> +	if (is_dock(handle) || is_ejectable_bay(handle))
>  		dock_add(handle);
>  
>  	return AE_OK;
>  }
>  
> -static __init acpi_status
> -find_bay(acpi_handle handle, u32 lvl, void *context, void **rv)
> -{
> -	/* If bay is a dock, it's already handled */
> -	if (is_ejectable_bay(handle) && !is_dock(handle))
> -		dock_add(handle);
> -	return AE_OK;
> -}
> -
>  static int __init dock_init(void)
>  {
>  	if (acpi_disabled)
>  		return 0;
>  
> -	/* look for a dock station */
> +	/* look for dock stations and bays */
>  	acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
> -			    ACPI_UINT32_MAX, find_dock, NULL, NULL, NULL);
> +		ACPI_UINT32_MAX, find_dock_and_bay, NULL, NULL, NULL);
>  
> -	/* look for bay */
> -	acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
> -			ACPI_UINT32_MAX, find_bay, NULL, NULL, NULL);
>  	if (!dock_station_count) {
>  		printk(KERN_INFO PREFIX "No dock devices found.\n");
>  		return 0;


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