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hwmon: (vexpress) Avoid creating non-existing attributes
authorPawel Moll <pawel.moll@arm.com>
Wed, 23 Apr 2014 17:27:05 +0000 (18:27 +0100)
committerGuenter Roeck <linux@roeck-us.net>
Thu, 24 Apr 2014 13:02:10 +0000 (06:02 -0700)
The 'label' attribute was always created but returned -ENOENT
if there is no label and such behaviour is undefined from
libsensors' point of view.

Fixed by providing is_visible method in the attributes group,
so the attribute is not created at all when unnecessary.

Reported-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Pawel Moll <pawel.moll@arm.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

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