get_sysfs_attr_uncached
Description:
Look up the sysfs attribute with name on this.
This function does blocking I/O, and updates the sysfs attributes cache.
Before version 238 the uncached getters would not strip trailing newlines.
Parameters:
| this | A Device. | 
| name | Name of the sysfs attribute. | 
Returns:
| The value of the sysfs attribute or  |