520 			struct io_thread_req *io_req = (*irq_req_buffer)[count];  in ubd_handler()  local
522 			if ((io_req->error == BLK_STS_NOTSUPP) && (req_op(io_req->req) == REQ_OP_DISCARD)) {  in ubd_handler()
523 				blk_queue_max_discard_sectors(io_req->req->q, 0);  in ubd_handler()
524 				blk_queue_max_write_zeroes_sectors(io_req->req->q, 0);  in ubd_handler()
525 				blk_queue_flag_clear(QUEUE_FLAG_DISCARD, io_req->req->q);  in ubd_handler()
527 			if ((io_req->error) || (io_req->buffer == NULL))  in ubd_handler()
528 				blk_mq_end_request(io_req->req, io_req->error);  in ubd_handler()
530 				if (!blk_update_request(io_req->req, io_req->error, io_req->length))  in ubd_handler()
531 					__blk_mq_end_request(io_req->req, io_req->error);  in ubd_handler()
533 			kfree(io_req);  in ubd_handler()
1316 	struct io_thread_req *io_req;  in ubd_queue_one_vec()  local
1319 	io_req = kmalloc(sizeof(struct io_thread_req), GFP_ATOMIC);  in ubd_queue_one_vec()
1320 	if (!io_req)  in ubd_queue_one_vec()
1323 	io_req->req = req;  in ubd_queue_one_vec()
1325 		io_req->fds[0] = dev->cow.fd;  in ubd_queue_one_vec()
1327 		io_req->fds[0] = dev->fd;  in ubd_queue_one_vec()
1328 	io_req->error = 0;  in ubd_queue_one_vec()
1331 		io_req->buffer = page_address(bvec->bv_page) + bvec->bv_offset;  in ubd_queue_one_vec()
1332 		io_req->length = bvec->bv_len;  in ubd_queue_one_vec()
1334 		io_req->buffer = NULL;  in ubd_queue_one_vec()
1335 		io_req->length = blk_rq_bytes(req);  in ubd_queue_one_vec()
1338 	io_req->sectorsize = SECTOR_SIZE;  in ubd_queue_one_vec()
1339 	io_req->fds[1] = dev->fd;  in ubd_queue_one_vec()
1340 	io_req->cow_offset = -1;  in ubd_queue_one_vec()
1341 	io_req->offset = off;  in ubd_queue_one_vec()
1342 	io_req->sector_mask = 0;  in ubd_queue_one_vec()
1343 	io_req->offsets[0] = 0;  in ubd_queue_one_vec()
1344 	io_req->offsets[1] = dev->cow.data_offset;  in ubd_queue_one_vec()
1347 		cowify_req(io_req, dev->cow.bitmap,  in ubd_queue_one_vec()
1350 	ret = os_write_file(thread_fd, &io_req, sizeof(io_req));  in ubd_queue_one_vec()
1351 	if (ret != sizeof(io_req)) {  in ubd_queue_one_vec()
1354 		kfree(io_req);  in ubd_queue_one_vec()