---
title: io
framework: kernel
role: symbol
role_heading: Instance Method
path: kernel/iousbhostpipe/3753556-io
---

# io

## Declaration

```occ
virtual IOReturn io(IOMemoryDescriptor *dataBuffer, IOUSBHostIsochronousTransaction *transactionList, uint32_t transactionListCount, uint64_t firstFrameNumber, IOOptionBits options, IOUSBHostIsochronousTransactionCompletion *completion);
```