369 static int nvme_trans_copy_to_user(struct sg_io_hdr *hdr, void *from,  in nvme_trans_copy_to_user()  argument
379 	if (hdr->iovec_count > 0) {  in nvme_trans_copy_to_user()
382 		for (i = 0; i < hdr->iovec_count; i++) {  in nvme_trans_copy_to_user()
383 			not_copied = copy_from_user(&sgl, hdr->dxferp +  in nvme_trans_copy_to_user()
402 	not_copied = copy_to_user(hdr->dxferp, from, n);  in nvme_trans_copy_to_user()
410 static int nvme_trans_copy_from_user(struct sg_io_hdr *hdr, void *to,  in nvme_trans_copy_from_user()  argument
420 	if (hdr->iovec_count > 0) {  in nvme_trans_copy_from_user()
423 		for (i = 0; i < hdr->iovec_count; i++) {  in nvme_trans_copy_from_user()
424 			not_copied = copy_from_user(&sgl, hdr->dxferp +  in nvme_trans_copy_from_user()
444 	not_copied = copy_from_user(to, hdr->dxferp, n);  in nvme_trans_copy_from_user()
452 static int nvme_trans_completion(struct sg_io_hdr *hdr, u8 status, u8 sense_key,  in nvme_trans_completion()  argument
460 		hdr->status = SAM_STAT_GOOD;  in nvme_trans_completion()
461 		hdr->masked_status = GOOD;  in nvme_trans_completion()
462 		hdr->host_status = DID_OK;  in nvme_trans_completion()
463 		hdr->driver_status = DRIVER_OK;  in nvme_trans_completion()
464 		hdr->sb_len_wr = 0;  in nvme_trans_completion()
466 		hdr->status = status;  in nvme_trans_completion()
467 		hdr->masked_status = status >> 1;  in nvme_trans_completion()
468 		hdr->host_status = DID_OK;  in nvme_trans_completion()
469 		hdr->driver_status = DRIVER_OK;  in nvme_trans_completion()
477 		xfer_len = min_t(u8, hdr->mx_sb_len, DESC_FMT_SENSE_DATA_SIZE);  in nvme_trans_completion()
478 		hdr->sb_len_wr = xfer_len;  in nvme_trans_completion()
479 		if (copy_to_user(hdr->sbp, resp, xfer_len) > 0)  in nvme_trans_completion()
486 static int nvme_trans_status_code(struct sg_io_hdr *hdr, int nvme_sc)  in nvme_trans_status_code()  argument
664 	res = nvme_trans_completion(hdr, status, sense_key, asc, ascq);  in nvme_trans_status_code()
672 					struct sg_io_hdr *hdr, u8 *inq_response,  in nvme_trans_standard_inquiry_page()  argument
696 	res = nvme_trans_status_code(hdr, nvme_sc);  in nvme_trans_standard_inquiry_page()
728 	res = nvme_trans_copy_to_user(hdr, inq_response, xfer_len);  in nvme_trans_standard_inquiry_page()
738 					struct sg_io_hdr *hdr, u8 *inq_response,  in nvme_trans_supported_vpd_pages()  argument
755 	res = nvme_trans_copy_to_user(hdr, inq_response, xfer_len);  in nvme_trans_supported_vpd_pages()
761 					struct sg_io_hdr *hdr, u8 *inq_response,  in nvme_trans_unit_serial_page()  argument
774 	res = nvme_trans_copy_to_user(hdr, inq_response, xfer_len);  in nvme_trans_unit_serial_page()
779 static int nvme_trans_device_id_page(struct nvme_ns *ns, struct sg_io_hdr *hdr,  in nvme_trans_device_id_page()  argument
805 		res = nvme_trans_status_code(hdr, nvme_sc);  in nvme_trans_device_id_page()
832 			res = nvme_trans_completion(hdr,  in nvme_trans_device_id_page()
851 	res = nvme_trans_copy_to_user(hdr, inq_response, xfer_len);  in nvme_trans_device_id_page()
860 static int nvme_trans_ext_inq_page(struct nvme_ns *ns, struct sg_io_hdr *hdr,  in nvme_trans_ext_inq_page()  argument
895 	res = nvme_trans_status_code(hdr, nvme_sc);  in nvme_trans_ext_inq_page()
911 	res = nvme_trans_status_code(hdr, nvme_sc);  in nvme_trans_ext_inq_page()
933 	res = nvme_trans_copy_to_user(hdr, inq_response, xfer_len);  in nvme_trans_ext_inq_page()
944 static int nvme_trans_bdev_limits_page(struct nvme_ns *ns, struct sg_io_hdr *hdr,  in nvme_trans_bdev_limits_page()  argument
961 	return nvme_trans_copy_to_user(hdr, inq_response, 0x3c);  in nvme_trans_bdev_limits_page()
964 static int nvme_trans_bdev_char_page(struct nvme_ns *ns, struct sg_io_hdr *hdr,  in nvme_trans_bdev_char_page()  argument
985 	res = nvme_trans_copy_to_user(hdr, inq_response, xfer_len);  in nvme_trans_bdev_char_page()
994 static int nvme_trans_log_supp_pages(struct nvme_ns *ns, struct sg_io_hdr *hdr,  in nvme_trans_log_supp_pages()  argument
1015 	res = nvme_trans_copy_to_user(hdr, log_response, xfer_len);  in nvme_trans_log_supp_pages()
1023 					struct sg_io_hdr *hdr, int alloc_len)  in nvme_trans_log_info_exceptions()  argument
1079 	res = nvme_trans_copy_to_user(hdr, log_response, xfer_len);  in nvme_trans_log_info_exceptions()
1089 static int nvme_trans_log_temperature(struct nvme_ns *ns, struct sg_io_hdr *hdr,  in nvme_trans_log_temperature()  argument
1160 	res = nvme_trans_copy_to_user(hdr, log_response, xfer_len);  in nvme_trans_log_temperature()
1196 static int nvme_trans_fill_blk_desc(struct nvme_ns *ns, struct sg_io_hdr *hdr,  in nvme_trans_fill_blk_desc()  argument
1222 	res = nvme_trans_status_code(hdr, nvme_sc);  in nvme_trans_fill_blk_desc()
1257 					struct sg_io_hdr *hdr, u8 *resp,  in nvme_trans_fill_control_page()  argument
1279 					struct sg_io_hdr *hdr,  in nvme_trans_fill_caching_page()  argument
1293 	res = nvme_trans_status_code(hdr, nvme_sc);  in nvme_trans_fill_caching_page()
1311 					struct sg_io_hdr *hdr, u8 *resp,  in nvme_trans_fill_pow_cnd_page()  argument
1327 					struct sg_io_hdr *hdr, u8 *resp,  in nvme_trans_fill_inf_exc_page()  argument
1343 static int nvme_trans_fill_all_pages(struct nvme_ns *ns, struct sg_io_hdr *hdr,  in nvme_trans_fill_all_pages()  argument
1354 	res = nvme_trans_fill_caching_page(ns, hdr, &resp[mode_pages_offset_1],  in nvme_trans_fill_all_pages()
1358 	res = nvme_trans_fill_control_page(ns, hdr, &resp[mode_pages_offset_2],  in nvme_trans_fill_all_pages()
1362 	res = nvme_trans_fill_pow_cnd_page(ns, hdr, &resp[mode_pages_offset_3],  in nvme_trans_fill_all_pages()
1366 	res = nvme_trans_fill_inf_exc_page(ns, hdr, &resp[mode_pages_offset_4],  in nvme_trans_fill_all_pages()
1386 					struct sg_io_hdr *hdr, u8 *cmd,  in nvme_trans_mode_page_create()  argument
1390 					struct sg_io_hdr *hdr, u8 *, int),  in nvme_trans_mode_page_create()
1425 		res = nvme_trans_fill_blk_desc(ns, hdr,  in nvme_trans_mode_page_create()
1431 	res = mode_page_fill_func(ns, hdr, &response[mode_pages_offset_1],  in nvme_trans_mode_page_create()
1437 	res = nvme_trans_copy_to_user(hdr, response, xfer_len);  in nvme_trans_mode_page_create()
1485 static int nvme_trans_power_state(struct nvme_ns *ns, struct sg_io_hdr *hdr,  in nvme_trans_power_state()  argument
1506 	res = nvme_trans_status_code(hdr, nvme_sc);  in nvme_trans_power_state()
1547 		res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,  in nvme_trans_power_state()
1554 	res = nvme_trans_status_code(hdr, nvme_sc);  in nvme_trans_power_state()
1569 static int nvme_trans_send_fw_cmd(struct nvme_ns *ns, struct sg_io_hdr *hdr,  in nvme_trans_send_fw_cmd()  argument
1583 		if (hdr->iovec_count > 0) {  in nvme_trans_send_fw_cmd()
1585 			res = nvme_trans_completion(hdr,  in nvme_trans_send_fw_cmd()
1593 				(unsigned long)hdr->dxferp, tot_len);  in nvme_trans_send_fw_cmd()
1614 	res = nvme_trans_status_code(hdr, nvme_sc);  in nvme_trans_send_fw_cmd()
1686 static int nvme_trans_modesel_get_mp(struct nvme_ns *ns, struct sg_io_hdr *hdr,  in nvme_trans_modesel_get_mp()  argument
1699 		res = nvme_trans_status_code(hdr, nvme_sc);  in nvme_trans_modesel_get_mp()
1712 			res = nvme_trans_completion(hdr,  in nvme_trans_modesel_get_mp()
1723 		res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,  in nvme_trans_modesel_get_mp()
1734 static int nvme_trans_modesel_data(struct nvme_ns *ns, struct sg_io_hdr *hdr,  in nvme_trans_modesel_data()  argument
1753 	res = nvme_trans_copy_from_user(hdr, parm_list, parm_list_len);  in nvme_trans_modesel_data()
1775 			res = nvme_trans_completion(hdr,  in nvme_trans_modesel_data()
1790 		res = nvme_trans_modesel_get_mp(ns, hdr, &parm_list[index],  in nvme_trans_modesel_data()
1806 					     struct sg_io_hdr *hdr)  in nvme_trans_fmt_set_blk_size_count()  argument
1832 		res = nvme_trans_status_code(hdr, nvme_sc);  in nvme_trans_fmt_set_blk_size_count()
1856 static int nvme_trans_fmt_get_parm_header(struct sg_io_hdr *hdr, u8 len,  in nvme_trans_fmt_get_parm_header()  argument
1868 	res = nvme_trans_copy_from_user(hdr, parm_list, len);  in nvme_trans_fmt_get_parm_header()
1874 		res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,  in nvme_trans_fmt_get_parm_header()
1882 		res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,  in nvme_trans_fmt_get_parm_header()
1904 		res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,  in nvme_trans_fmt_get_parm_header()
1916 static int nvme_trans_fmt_send_cmd(struct nvme_ns *ns, struct sg_io_hdr *hdr,  in nvme_trans_fmt_send_cmd()  argument
1940 	res = nvme_trans_status_code(hdr, nvme_sc);  in nvme_trans_fmt_send_cmd()
1958 		res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,  in nvme_trans_fmt_send_cmd()
1963 		res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,  in nvme_trans_fmt_send_cmd()
1976 	res = nvme_trans_status_code(hdr, nvme_sc);  in nvme_trans_fmt_send_cmd()
2038 static inline u32 nvme_trans_io_get_num_cmds(struct sg_io_hdr *hdr,  in nvme_trans_io_get_num_cmds()  argument
2043 	if (hdr->iovec_count > 0)  in nvme_trans_io_get_num_cmds()
2044 		return hdr->iovec_count;  in nvme_trans_io_get_num_cmds()
2064 static int nvme_trans_do_nvme_io(struct nvme_ns *ns, struct sg_io_hdr *hdr,  in nvme_trans_do_nvme_io()  argument
2083 	num_cmds = nvme_trans_io_get_num_cmds(hdr, cdb_info, max_blocks);  in nvme_trans_do_nvme_io()
2096 		if (hdr->iovec_count > 0) {  in nvme_trans_do_nvme_io()
2099 			retcode = copy_from_user(&sgl, hdr->dxferp +  in nvme_trans_do_nvme_io()
2111 			next_mapping_addr = hdr->dxferp +  in nvme_trans_do_nvme_io()
2149 			res = nvme_trans_status_code(hdr, nvme_sc);  in nvme_trans_do_nvme_io()
2157 	res = nvme_trans_status_code(hdr, NVME_SC_SUCCESS);  in nvme_trans_do_nvme_io()
2166 static int nvme_trans_io(struct nvme_ns *ns, struct sg_io_hdr *hdr, u8 is_write,  in nvme_trans_io()  argument
2203 	if (hdr->iovec_count > 0) {  in nvme_trans_io()
2204 		for (i = 0; i < hdr->iovec_count; i++) {  in nvme_trans_io()
2205 			not_copied = copy_from_user(&sgl, hdr->dxferp +  in nvme_trans_io()
2213 				res = nvme_trans_completion(hdr,  in nvme_trans_io()
2222 		sum_iov_len = hdr->dxfer_len;  in nvme_trans_io()
2226 	xfer_bytes = min(((u64)hdr->dxfer_len), sum_iov_len);  in nvme_trans_io()
2239 	res = nvme_trans_do_nvme_io(ns, hdr, &cdb_info, is_write);  in nvme_trans_io()
2247 static int nvme_trans_inquiry(struct nvme_ns *ns, struct sg_io_hdr *hdr,  in nvme_trans_inquiry()  argument
2269 			res = nvme_trans_standard_inquiry_page(ns, hdr,  in nvme_trans_inquiry()
2272 			res = nvme_trans_completion(hdr,  in nvme_trans_inquiry()
2281 			res = nvme_trans_supported_vpd_pages(ns, hdr,  in nvme_trans_inquiry()
2285 			res = nvme_trans_unit_serial_page(ns, hdr, inq_response,  in nvme_trans_inquiry()
2289 			res = nvme_trans_device_id_page(ns, hdr, inq_response,  in nvme_trans_inquiry()
2293 			res = nvme_trans_ext_inq_page(ns, hdr, alloc_len);  in nvme_trans_inquiry()
2296 			res = nvme_trans_bdev_limits_page(ns, hdr, inq_response,  in nvme_trans_inquiry()
2300 			res = nvme_trans_bdev_char_page(ns, hdr, alloc_len);  in nvme_trans_inquiry()
2303 			res = nvme_trans_completion(hdr,  in nvme_trans_inquiry()
2316 static int nvme_trans_log_sense(struct nvme_ns *ns, struct sg_io_hdr *hdr,  in nvme_trans_log_sense()  argument
2327 		res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,  in nvme_trans_log_sense()
2336 		res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,  in nvme_trans_log_sense()
2344 		res = nvme_trans_log_supp_pages(ns, hdr, alloc_len);  in nvme_trans_log_sense()
2347 		res = nvme_trans_log_info_exceptions(ns, hdr, alloc_len);  in nvme_trans_log_sense()
2350 		res = nvme_trans_log_temperature(ns, hdr, alloc_len);  in nvme_trans_log_sense()
2353 		res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,  in nvme_trans_log_sense()
2363 static int nvme_trans_mode_select(struct nvme_ns *ns, struct sg_io_hdr *hdr,  in nvme_trans_mode_select()  argument
2392 		res = nvme_trans_modesel_data(ns, hdr, cmd, parm_list_len,  in nvme_trans_mode_select()
2399 static int nvme_trans_mode_sense(struct nvme_ns *ns, struct sg_io_hdr *hdr,  in nvme_trans_mode_sense()  argument
2419 		res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,  in nvme_trans_mode_sense()
2429 		res = nvme_trans_mode_page_create(ns, hdr, cmd, alloc_len,  in nvme_trans_mode_sense()
2435 		res = nvme_trans_mode_page_create(ns, hdr, cmd, alloc_len,  in nvme_trans_mode_sense()
2441 		res = nvme_trans_mode_page_create(ns, hdr, cmd, alloc_len,  in nvme_trans_mode_sense()
2447 		res = nvme_trans_mode_page_create(ns, hdr, cmd, alloc_len,  in nvme_trans_mode_sense()
2453 		res = nvme_trans_mode_page_create(ns, hdr, cmd, alloc_len,  in nvme_trans_mode_sense()
2459 		res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,  in nvme_trans_mode_sense()
2469 static int nvme_trans_read_capacity(struct nvme_ns *ns, struct sg_io_hdr *hdr,  in nvme_trans_read_capacity()  argument
2498 	res = nvme_trans_status_code(hdr, nvme_sc);  in nvme_trans_read_capacity()
2515 	res = nvme_trans_copy_to_user(hdr, response, xfer_len);  in nvme_trans_read_capacity()
2525 static int nvme_trans_report_luns(struct nvme_ns *ns, struct sg_io_hdr *hdr,  in nvme_trans_report_luns()  argument
2547 		res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,  in nvme_trans_report_luns()
2561 		res = nvme_trans_status_code(hdr, nvme_sc);  in nvme_trans_report_luns()
2573 			res = nvme_trans_completion(hdr,  in nvme_trans_report_luns()
2601 	res = nvme_trans_copy_to_user(hdr, response, xfer_len);  in nvme_trans_report_luns()
2611 static int nvme_trans_request_sense(struct nvme_ns *ns, struct sg_io_hdr *hdr,  in nvme_trans_request_sense()  argument
2654 	res = nvme_trans_copy_to_user(hdr, response, xfer_len);  in nvme_trans_request_sense()
2662 					struct sg_io_hdr *hdr,  in nvme_trans_security_protocol()  argument
2665 	return nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,  in nvme_trans_security_protocol()
2670 static int nvme_trans_start_stop(struct nvme_ns *ns, struct sg_io_hdr *hdr,  in nvme_trans_start_stop()  argument
2691 		res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,  in nvme_trans_start_stop()
2702 			res = nvme_trans_status_code(hdr, nvme_sc);  in nvme_trans_start_stop()
2711 		res = nvme_trans_power_state(ns, hdr, pc, pcmod, start);  in nvme_trans_start_stop()
2719 					struct sg_io_hdr *hdr, u8 *cmd)  in nvme_trans_synchronize_cache()  argument
2731 	res = nvme_trans_status_code(hdr, nvme_sc);  in nvme_trans_synchronize_cache()
2741 static int nvme_trans_format_unit(struct nvme_ns *ns, struct sg_io_hdr *hdr,  in nvme_trans_format_unit()  argument
2768 		res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,  in nvme_trans_format_unit()
2780 		res = nvme_trans_fmt_get_parm_header(hdr, parm_hdr_len,  in nvme_trans_format_unit()
2787 	res = nvme_trans_send_fw_cmd(ns, hdr, nvme_admin_activate_fw, 0, 0, 0);  in nvme_trans_format_unit()
2790 	res = nvme_trans_fmt_set_blk_size_count(ns, hdr);  in nvme_trans_format_unit()
2794 	res = nvme_trans_fmt_send_cmd(ns, hdr, nvme_pf_code);  in nvme_trans_format_unit()
2801 					struct sg_io_hdr *hdr,  in nvme_trans_test_unit_ready()  argument
2808 		res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,  in nvme_trans_test_unit_ready()
2812 		res = nvme_trans_completion(hdr, SAM_STAT_GOOD, NO_SENSE, 0, 0);  in nvme_trans_test_unit_ready()
2817 static int nvme_trans_write_buffer(struct nvme_ns *ns, struct sg_io_hdr *hdr,  in nvme_trans_write_buffer()  argument
2828 		res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,  in nvme_trans_write_buffer()
2835 		res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,  in nvme_trans_write_buffer()
2847 		res = nvme_trans_send_fw_cmd(ns, hdr, nvme_admin_download_fw,  in nvme_trans_write_buffer()
2852 		res = nvme_trans_send_fw_cmd(ns, hdr, nvme_admin_activate_fw,  in nvme_trans_write_buffer()
2857 		res = nvme_trans_send_fw_cmd(ns, hdr, nvme_admin_download_fw,  in nvme_trans_write_buffer()
2862 		res = nvme_trans_send_fw_cmd(ns, hdr, nvme_admin_activate_fw,  in nvme_trans_write_buffer()
2867 		res = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,  in nvme_trans_write_buffer()
2890 static int nvme_trans_unmap(struct nvme_ns *ns, struct sg_io_hdr *hdr,  in nvme_trans_unmap()  argument
2909 	res = nvme_trans_copy_from_user(hdr, plist, list_len);  in nvme_trans_unmap()
2938 	res = nvme_trans_status_code(hdr, nvme_sc);  in nvme_trans_unmap()
2947 static int nvme_scsi_translate(struct nvme_ns *ns, struct sg_io_hdr *hdr)  in nvme_scsi_translate()  argument
2953 	if (hdr->cmdp == NULL)  in nvme_scsi_translate()
2955 	if (copy_from_user(cmd, hdr->cmdp, hdr->cmd_len))  in nvme_scsi_translate()
2962 	retcode = nvme_trans_status_code(hdr, NVME_SC_SUCCESS);  in nvme_scsi_translate()
2973 		retcode = nvme_trans_io(ns, hdr, 0, cmd);  in nvme_scsi_translate()
2979 		retcode = nvme_trans_io(ns, hdr, 1, cmd);  in nvme_scsi_translate()
2982 		retcode = nvme_trans_inquiry(ns, hdr, cmd);  in nvme_scsi_translate()
2985 		retcode = nvme_trans_log_sense(ns, hdr, cmd);  in nvme_scsi_translate()
2989 		retcode = nvme_trans_mode_select(ns, hdr, cmd);  in nvme_scsi_translate()
2993 		retcode = nvme_trans_mode_sense(ns, hdr, cmd);  in nvme_scsi_translate()
2996 		retcode = nvme_trans_read_capacity(ns, hdr, cmd);  in nvme_scsi_translate()
3000 			retcode = nvme_trans_read_capacity(ns, hdr, cmd);  in nvme_scsi_translate()
3005 		retcode = nvme_trans_report_luns(ns, hdr, cmd);  in nvme_scsi_translate()
3008 		retcode = nvme_trans_request_sense(ns, hdr, cmd);  in nvme_scsi_translate()
3012 		retcode = nvme_trans_security_protocol(ns, hdr, cmd);  in nvme_scsi_translate()
3015 		retcode = nvme_trans_start_stop(ns, hdr, cmd);  in nvme_scsi_translate()
3018 		retcode = nvme_trans_synchronize_cache(ns, hdr, cmd);  in nvme_scsi_translate()
3021 		retcode = nvme_trans_format_unit(ns, hdr, cmd);  in nvme_scsi_translate()
3024 		retcode = nvme_trans_test_unit_ready(ns, hdr, cmd);  in nvme_scsi_translate()
3027 		retcode = nvme_trans_write_buffer(ns, hdr, cmd);  in nvme_scsi_translate()
3030 		retcode = nvme_trans_unmap(ns, hdr, cmd);  in nvme_scsi_translate()
3034 		retcode = nvme_trans_completion(hdr, SAM_STAT_CHECK_CONDITION,  in nvme_scsi_translate()
3044 	struct sg_io_hdr hdr;  in nvme_sg_io()  local
3049 	if (copy_from_user(&hdr, u_hdr, sizeof(hdr)))  in nvme_sg_io()
3051 	if (hdr.interface_id != 'S')  in nvme_sg_io()
3053 	if (hdr.cmd_len > BLK_MAX_CDB)  in nvme_sg_io()
3056 	retcode = nvme_scsi_translate(ns, &hdr);  in nvme_sg_io()
3061 	if (copy_to_user(u_hdr, &hdr, sizeof(sg_io_hdr_t)) > 0)  in nvme_sg_io()