Comedi subdevices that support asynchronous acquisition commands have a
wait queue head used for blocking reads or writes and for the poll file
operation. The comedi device may have several subdevices that support
"read" and/or "write" commands, but each open file object has at most
one "read"
Comedi subdevices that support asynchronous acquisition commands have a
wait queue head used for blocking reads or writes and for the poll file
operation. The comedi device may have several subdevices that support
"read" and/or "write" commands, but each open file object has at most
one "read"
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