usb_alloc_streams (9) Linux Manual Page
usb_alloc_streams – allocate bulk endpoint stream IDs.
Synopsis
int usb_alloc_streams(struct usb_interface *interface, struct usb_host_endpoint **eps, unsigned int num_eps, unsigned int num_streams, gfp_t mem_flags);Arguments
interface
-
- alternate setting that includes all endpoints.
eps
- array of endpoints that need streams.
num_eps
- number of endpoints in the array.
num_streams
- number of streams to allocate.
mem_flags
- flags hcd should use to allocate memory.
Description
Sets up a group of bulk endpoints to have num_streams stream IDs available. Drivers may queue multiple transfers to different stream IDs, which may complete in a different order than they were queued.
Return
On success, the number of allocated streams. On failure, a negative error code.