| USB_EP_ALLOC_REQUEST(9) | Kernel Mode Gadget API | USB_EP_ALLOC_REQUEST(9) |
NAME¶
usb_ep_alloc_request - allocate a request object to use with this endpoint
SYNOPSIS¶
struct usb_request * usb_ep_alloc_request(struct usb_ep * ep, gfp_t gfp_flags);
ARGUMENTS¶
ep
the endpoint to be used with with the request
gfp_flags
GFP_* flags to use
DESCRIPTION¶
Request objects must be allocated with this call, since they normally need controller-specific setup and may even need endpoint-specific resources such as allocation of DMA descriptors. Requests may be submitted with usb_ep_queue, and receive a single completion callback. Free requests with usb_ep_free_request, when they are no longer needed.
Returns the request, or null if one could not be allocated.
AUTHOR¶
David Brownell <dbrownell@users.sourceforge.net>
Author.
COPYRIGHT¶
| April 2023 | Kernel Hackers Manual 2.6. |