Re: [PATCH] mmc: Change the enhanced area related sysfs output format

[Adrian Hunter]

On 14/06/16 13:12, Wolfram Sang wrote:
> On Tue, Jun 14, 2016 at 10:33:06AM +0200, Beata Baranowska wrote:
>> From: Chuanxiao Dong <chuanxiao.dong@xxxxxxxxx>
>>
>> When the enhanced area feature was not enabled, the related sysfs will 
>> have -EINVAL(-22) value, so change the sysfs output format to display 
>> the correct value.
>>
>> Signed-off-by: Chuanxiao Dong <chuanxiao.dong@xxxxxxxxx>
> 
> What about introducing attribute_group an use the is_visible callback
> there, so they won't get displayed at all?
> 

Except that it is an ABI:

	Documentation/ABI/testing/sysfs-devices-mmc