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Why EIO used instead of EBUSY in device drivers???



Hi,

    I was looking at the initialization code for TUN/TAP and mwave devices, 
both those places they return a  -EIO error code when they fail to 
initialize a device. the misc_register which they call the initialize the 
device return a EBUSY. Should'nt the device driver also return EBUSY as an 
error during registering a device is EBUSY not EIO!!!!!
   Or is it the case that the misc_register should check if it was an EIO 
and not EBUSY>????????


thanks
gaurav

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