---
title: DeviceRequest
framework: kernel
role: symbol
role_heading: Instance Method
path: kernel/iousbhostdevice/3294627-devicerequest
---

# DeviceRequest

## Declaration

```occ
kern_return_t DeviceRequest(IOService *forClient, uint8_t bmRequestType, uint8_t bRequest, uint16_t wValue, uint16_t wIndex, uint16_t wLength, IOMemoryDescriptor *dataBuffer, uint16_t *bytesTransferred, uint32_t completionTimeoutMs, OSDispatchMethod supermethod);
```