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The GetEndpointStallState function returns the stall state on the specified endpoint.
Syntax
typedef
EFI_STATUS
(EFIAPI * EFI_USBFN_IO_GET_ENDPOINT_STALL_STATE) (
IN EFI_USBFN_IO_PROTOCOL *This,
IN UINT8 EndpointIndex,
IN EFI_USBFN_ENDPOINT_DIRECTION Direction,
IN OUT BOOLEAN *State
);
Parameters
This
A pointer to the EFI_USBFN_IO_PROTOCOL instance.
EndpointIndex
Indicates the endpoint.
Direction
Direction of the endpoint. For more information, see EFI_USBFN_ENDPOINT_DIRECTION.
State
Boolean; TRUE value indicates that the endpoint is in a stalled state, FALSE otherwise.
Return values
The function returns the following values:
| Return code | Description |
|---|---|
| EFI_SUCCESS | The function returned successfully. |
| EFI_INVALID_PARAMETER | A parameter is invalid. |
| EFI_DEVICE_ERROR | The physical device reported an error. |
| EFI_NOT_READY | The physical device is busy or not ready to process this request. |
Remarks
This function fails with EFI_INVALID_PARAMETER if the specified direction is incorrect for the endpoint.
Requirements
Header: User generated