PUSB_BUSIFFN_SUBMIT_ISO_OUT_URB callback function (usbbusif.h)

Article
02/22/2024

This callback function is not supported.

The SubmitIsoOutUrb function submits a USB request block (URB) directly to the bus driver without requiring the allocation of an IRP.

Syntax

typedef NTSTATUS
  (USB_BUSIFFN *PUSB_BUSIFFN_SUBMIT_ISO_OUT_URB) (
    IN PVOID,
    IN PURB
  );

Parameters

[in] unnamedParam1

Handle returned in the BusContext member of the USB_BUS_INTERFACE_USBDI_V0 structure by an IRP_MN_QUERY_INTERFACE request.

[in] unnamedParam2

Pointer to the URB to be passed to the port driver.

Return value

SubmitIsoOutUrb returns one of the following values:

Return code	Description
`STATUS_SUCCESS`	The call completed successfully.
`STATUS_NOT_SUPPORTED`	Fast isochronous interfaces and real-time threads are not supported by the host controller.

Remarks

This function replaces the USBD_BusSubmitIsoOutUrb library function provided by usbd.sys.

This function allows clients running in real-time threads at an elevated IRQL to have rapid access to the bus driver. This USB host controller must support real-time threads for this function to work.

The calling driver forfeits any packet-level error information when calling this function.

Requirements

Requirement	Value
Target Platform	Desktop
Header	usbbusif.h (include Usbbusif.h)
IRQL	ANY

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