linux-kernel - Re: [PATCH 1/7] ACPI / scan: Introduce acpi_scan_match

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Message-ID: <5123203A.8020107@jp.fujitsu.com>
Date:	Tue, 19 Feb 2013 15:48:26 +0900
From:	Yasuaki Ishimatsu <isimatu.yasuaki@...fujitsu.com>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
CC:	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Yinghai Lu <yinghai@...nel.org>,
	Toshi Kani <toshi.kani@...com>, Jiang Liu <liuj97@...il.com>
Subject: Re: [PATCH 1/7] ACPI / scan: Introduce acpi_scan_match_handler()

2013/02/18 0:20, Rafael J. Wysocki wrote:
> From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
>
> Introduce helper routine acpi_scan_match_handler() that will find the
> ACPI scan handler matching a given device ID, if there is one, and
> rework acpi_scan_attach_handler() to use the new routine (that
> routine will also be useful for other purposes going forward).
>
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> ---

Acked-by: Yasuaki Ishimatsu <isimatu.yasuaki@...fujitsu.com>

Thanks,
Yasuaki Ishimatsu

>   drivers/acpi/scan.c |   53 +++++++++++++++++++++++++++-------------------------
>   1 file changed, 28 insertions(+), 25 deletions(-)
>
> Index: test/drivers/acpi/scan.c
> ===================================================================
> --- test.orig/drivers/acpi/scan.c
> +++ test/drivers/acpi/scan.c
> @@ -1529,6 +1529,25 @@ static int acpi_bus_type_and_status(acpi
>   	return 0;
>   }
>
> +static struct acpi_scan_handler *acpi_scan_match_handler(char *idstr,
> +					const struct acpi_device_id **matchid)
> +{
> +	struct acpi_scan_handler *handler;
> +
> +	list_for_each_entry(handler, &acpi_scan_handlers_list, list_node) {
> +		const struct acpi_device_id *devid;
> +
> +		for (devid = handler->ids; devid->id[0]; devid++)
> +			if (!strcmp((char *)devid->id, idstr)) {
> +				if (matchid)
> +					*matchid = devid;
> +
> +				return handler;
> +			}
> +	}
> +	return NULL;
> +}
> +
>   static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used,
>   				      void *not_used, void **return_value)
>   {
> @@ -1576,42 +1595,26 @@ static acpi_status acpi_bus_check_add(ac
>   	return AE_OK;
>   }
>
> -static int acpi_scan_do_attach_handler(struct acpi_device *device, char *id)
> +static int acpi_scan_attach_handler(struct acpi_device *device)
>   {
> -	struct acpi_scan_handler *handler;
> +	struct acpi_hardware_id *hwid;
> +	int ret = 0;
>
> -	list_for_each_entry(handler, &acpi_scan_handlers_list, list_node) {
> +	list_for_each_entry(hwid, &device->pnp.ids, list) {
>   		const struct acpi_device_id *devid;
> +		struct acpi_scan_handler *handler;
>
> -		for (devid = handler->ids; devid->id[0]; devid++) {
> -			int ret;
> -
> -			if (strcmp((char *)devid->id, id))
> -				continue;
> -
> +		handler = acpi_scan_match_handler(hwid->id, &devid);
> +		if (handler) {
>   			ret = handler->attach(device, devid);
>   			if (ret > 0) {
>   				device->handler = handler;
> -				return ret;
> +				break;
>   			} else if (ret < 0) {
> -				return ret;
> +				break;
>   			}
>   		}
>   	}
> -	return 0;
> -}
> -
> -static int acpi_scan_attach_handler(struct acpi_device *device)
> -{
> -	struct acpi_hardware_id *hwid;
> -	int ret = 0;
> -
> -	list_for_each_entry(hwid, &device->pnp.ids, list) {
> -		ret = acpi_scan_do_attach_handler(device, hwid->id);
> -		if (ret)
> -			break;
> -
> -	}
>   	return ret;
>   }
>
>


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