usb_alloc_streams (9) - Linux Manuals

usb_alloc_streams: allocate bulk endpoint stream IDs.

NAME

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.

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