linux-kernel - Re: [PATCH] Fix a hard coding style when determining if a device is a container.

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Message-ID: <5077F542.3010003@cn.fujitsu.com>
Date:	Fri, 12 Oct 2012 18:47:30 +0800
From:	Tang Chen <tangchen@...fujitsu.com>
To:	Yasuaki Ishimatsu <isimatu.yasuaki@...fujitsu.com>
CC:	bhelgaas@...gle.com, lenb@...nel.org, yinghai@...nel.org,
	izumi.taku@...fujitsu.com, jiang.liu@...wei.com,
	linux-acpi@...r.kernel.org, linux-pci@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Fix a hard coding style when determining if a device
 is a container.

On 10/12/2012 06:10 PM, Yasuaki Ishimatsu wrote:
> Hi Tang,
> 
> 2012/10/12 15:55, Tang Chen wrote:
>> "ACPI0004","PNP0A05" and "PNP0A06" are all defined in array
>> container_device_ids[], so use it, but not the hard coding style.
> 
> The idea is good.
> 
>>
>> Signed-off-by: Tang Chen<tangchen@...fujitsu.com>
>> ---
>>    drivers/acpi/container.c |   10 +++++++---
>>    1 files changed, 7 insertions(+), 3 deletions(-)
>>
>> diff --git a/drivers/acpi/container.c b/drivers/acpi/container.c
>> index 1f9f7d7..448c0e2 100644
>> --- a/drivers/acpi/container.c
>> +++ b/drivers/acpi/container.c
>> @@ -217,6 +217,7 @@ container_walk_namespace_cb(acpi_handle handle,
>>    {
>>    	char *hid = NULL;
>>    	struct acpi_device_info *info;
>> +	struct acpi_device_id *container_id;
>>    	acpi_status status;
>>    	int *action = context;
>>
>> @@ -232,10 +233,13 @@ container_walk_namespace_cb(acpi_handle handle,
>>    		goto end;
>>    	}
>>
>> -	if (strcmp(hid, "ACPI0004")&&  strcmp(hid, "PNP0A05")&&
>> -	    strcmp(hid, "PNP0A06")) {
>> -		goto end;
>> +	for (container_id = container_device_ids;
>> +	     container_id->id[0]; container_id++) {
>> +		if (!strcmp((char *)container_id->id, hid))
>> +			break;
>>    	}
>> +	if (!container_id->id[0])
>> +		goto end;
> 
> How about prepare is_container_device() function and check whether
> the device is the container device or not as below?

Sure. :)
A new patch will be sent soon.

Thanks for the wonderful idea. :)

> 
> 	if (is_container_device())
> 		goto end;
> 
> Thanks,
> Yasuaki Ishimatsu
> 
>>
>>    	switch (*action) {
>>    	case INSTALL_NOTIFY_HANDLER:
>>
> 
> 
> --
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