USB_EP_ALLOC_REQUEST

Section: Kernel Mode Gadget API (9)
Updated: February 2011
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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

: 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>