| USB_ALLOC_STREAMS(9) | Host Controller APIs | USB_ALLOC_STREAMS(9) |
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.
COPYRIGHT¶
| June 2024 | Kernel Hackers Manual 3.10 |