CLASS_FIND_DEVICE man page on Scientific

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CLASS_FIND_DEVICE(9)	 Device drivers infrastructure	  CLASS_FIND_DEVICE(9)

       class_find_device - device iterator for locating a particular device

       struct device * class_find_device(struct class * class,
					 struct device * start, void * data,
					 int (*match) (struct device *, void *));

	   the class we´re iterating

	   Device to begin with

	   data for the match function

	   function to check device

       This is similar to the class_for_each_dev function above, but it
       returns a reference to a device that is ´found´ for later use, as
       determined by the match callback.

       The callback should return 0 if the device doesn´t match and non-zero
       if it does. If the callback returns non-zero, this function will return
       to the caller and not iterate over any more devices.

       Note, you will need to drop the reference with put_device after use.

       fn is allowed to do anything including calling back into class code.
       There´s no locking restriction.

Kernel Hackers Manual 2.6.	 November 2013		  CLASS_FIND_DEVICE(9)

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