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EFI_USBFN_IO_PROTOCOL.GetEndpointStallState

  • Artikel

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