796 static inline void *ffs_alloc_buffer(struct ffs_io_data *io_data,  in ffs_alloc_buffer()  argument
799 	if (io_data->use_sg)  in ffs_alloc_buffer()
800 		return ffs_build_sg_list(&io_data->sgt, data_len);  in ffs_alloc_buffer()
805 static inline void ffs_free_buffer(struct ffs_io_data *io_data)  in ffs_free_buffer()  argument
807 	if (!io_data->buf)  in ffs_free_buffer()
810 	if (io_data->use_sg) {  in ffs_free_buffer()
811 		sg_free_table(&io_data->sgt);  in ffs_free_buffer()
812 		vfree(io_data->buf);  in ffs_free_buffer()
814 		kfree(io_data->buf);  in ffs_free_buffer()
820 	struct ffs_io_data *io_data = container_of(work, struct ffs_io_data,  in ffs_user_copy_worker()  local
822 	int ret = io_data->req->status ? io_data->req->status :  in ffs_user_copy_worker()
823 					 io_data->req->actual;  in ffs_user_copy_worker()
824 	bool kiocb_has_eventfd = io_data->kiocb->ki_flags & IOCB_EVENTFD;  in ffs_user_copy_worker()
826 	if (io_data->read && ret > 0) {  in ffs_user_copy_worker()
827 		kthread_use_mm(io_data->mm);  in ffs_user_copy_worker()
828 		ret = ffs_copy_to_iter(io_data->buf, ret, &io_data->data);  in ffs_user_copy_worker()
829 		kthread_unuse_mm(io_data->mm);  in ffs_user_copy_worker()
832 	io_data->kiocb->ki_complete(io_data->kiocb, ret, ret);  in ffs_user_copy_worker()
834 	if (io_data->ffs->ffs_eventfd && !kiocb_has_eventfd)  in ffs_user_copy_worker()
835 		eventfd_signal(io_data->ffs->ffs_eventfd, 1);  in ffs_user_copy_worker()
837 	usb_ep_free_request(io_data->ep, io_data->req);  in ffs_user_copy_worker()
839 	if (io_data->read)  in ffs_user_copy_worker()
840 		kfree(io_data->to_free);  in ffs_user_copy_worker()
841 	ffs_free_buffer(io_data);  in ffs_user_copy_worker()
842 	kfree(io_data);  in ffs_user_copy_worker()
848 	struct ffs_io_data *io_data = req->context;  in ffs_epfile_async_io_complete()  local
849 	struct ffs_data *ffs = io_data->ffs;  in ffs_epfile_async_io_complete()
853 	INIT_WORK(&io_data->work, ffs_user_copy_worker);  in ffs_epfile_async_io_complete()
854 	queue_work(ffs->io_completion_wq, &io_data->work);  in ffs_epfile_async_io_complete()
939 static ssize_t ffs_epfile_io(struct file *file, struct ffs_io_data *io_data)  in ffs_epfile_io()  argument
965 	halt = (!io_data->read == !epfile->in);  in ffs_epfile_io()
985 		if (!io_data->aio && io_data->read) {  in ffs_epfile_io()
986 			ret = __ffs_epfile_read_buffered(epfile, &io_data->data);  in ffs_epfile_io()
1004 		data_len = iov_iter_count(&io_data->data);  in ffs_epfile_io()
1009 		if (io_data->read)  in ffs_epfile_io()
1012 		io_data->use_sg = gadget->sg_supported && data_len > PAGE_SIZE;  in ffs_epfile_io()
1015 		data = ffs_alloc_buffer(io_data, data_len);  in ffs_epfile_io()
1020 		if (!io_data->read &&  in ffs_epfile_io()
1021 		    !copy_from_iter_full(data, data_len, &io_data->data)) {  in ffs_epfile_io()
1050 	} else if (!io_data->aio) {  in ffs_epfile_io()
1055 		if (io_data->use_sg) {  in ffs_epfile_io()
1057 			req->sg	= io_data->sgt.sgl;  in ffs_epfile_io()
1058 			req->num_sgs = io_data->sgt.nents;  in ffs_epfile_io()
1065 		io_data->buf = data;  in ffs_epfile_io()
1090 		else if (io_data->read && ep->status > 0)  in ffs_epfile_io()
1092 						     &io_data->data);  in ffs_epfile_io()
1099 		if (io_data->use_sg) {  in ffs_epfile_io()
1101 			req->sg	= io_data->sgt.sgl;  in ffs_epfile_io()
1102 			req->num_sgs = io_data->sgt.nents;  in ffs_epfile_io()
1109 		io_data->buf = data;  in ffs_epfile_io()
1110 		io_data->ep = ep->ep;  in ffs_epfile_io()
1111 		io_data->req = req;  in ffs_epfile_io()
1112 		io_data->ffs = epfile->ffs;  in ffs_epfile_io()
1114 		req->context  = io_data;  in ffs_epfile_io()
1119 			io_data->req = NULL;  in ffs_epfile_io()
1138 		ffs_free_buffer(io_data);  in ffs_epfile_io()
1160 	struct ffs_io_data *io_data = kiocb->private;  in ffs_aio_cancel()  local
1169 	if (likely(io_data && io_data->ep && io_data->req))  in ffs_aio_cancel()
1170 		value = usb_ep_dequeue(io_data->ep, io_data->req);  in ffs_aio_cancel()
1181 	struct ffs_io_data io_data, *p = &io_data;  in ffs_epfile_write_iter()  local
1187 		p = kzalloc(sizeof(io_data), GFP_KERNEL);  in ffs_epfile_write_iter()
1218 	struct ffs_io_data io_data, *p = &io_data;  in ffs_epfile_read_iter()  local
1224 		p = kzalloc(sizeof(io_data), GFP_KERNEL);  in ffs_epfile_read_iter()