765 	size_t used_bytes;  in efx_bootcfg_copy_sector()
776 				    &used_bytes);  in efx_bootcfg_copy_sector()
782 		if ((used_bytes < 2) ||  in efx_bootcfg_copy_sector()
783 		    (sector[used_bytes - 1] != EFX_DHCP_END)) {  in efx_bootcfg_copy_sector()
791 	if (rc != 0 || used_bytes == 0) {  in efx_bootcfg_copy_sector()
794 		used_bytes = 2;  in efx_bootcfg_copy_sector()
796 	EFSYS_ASSERT(used_bytes >= 2);	/* checksum and EFX_DHCP_END */  in efx_bootcfg_copy_sector()
797 	EFSYS_ASSERT(used_bytes <= sector_length);  in efx_bootcfg_copy_sector()
805 	if (sector[used_bytes - 1] != EFX_DHCP_END) {  in efx_bootcfg_copy_sector()
806 		if (used_bytes >= sector_length) {  in efx_bootcfg_copy_sector()
808 			used_bytes = 1;  in efx_bootcfg_copy_sector()
810 		sector[used_bytes] = EFX_DHCP_END;  in efx_bootcfg_copy_sector()
811 		++used_bytes;  in efx_bootcfg_copy_sector()
818 	if (used_bytes > data_size) {  in efx_bootcfg_copy_sector()
826 	memcpy(data + 1, sector + 1, used_bytes - 1);  in efx_bootcfg_copy_sector()
829 	if (used_bytes < data_size)  in efx_bootcfg_copy_sector()
830 		(void) memset(data + used_bytes, 0, data_size - used_bytes);  in efx_bootcfg_copy_sector()
860 	size_t used_bytes;  in efx_bootcfg_read()  local
931 	    &used_bytes);  in efx_bootcfg_read()
932 	if (rc != 0 || used_bytes == 0) {  in efx_bootcfg_read()
935 		used_bytes = 2;  in efx_bootcfg_read()
938 	EFSYS_ASSERT(used_bytes >= 2);	/* checksum and EFX_DHCP_END */  in efx_bootcfg_read()
939 	EFSYS_ASSERT(used_bytes <= sector_length);  in efx_bootcfg_read()
948 	if (payload[used_bytes - 1] != EFX_DHCP_END) {  in efx_bootcfg_read()
949 		if (used_bytes >= sector_length)  in efx_bootcfg_read()
950 			used_bytes = 1;  in efx_bootcfg_read()
952 		payload[used_bytes] = EFX_DHCP_END;  in efx_bootcfg_read()
953 		++used_bytes;  in efx_bootcfg_read()
960 	if (used_bytes > size) {  in efx_bootcfg_read()
969 		memcpy(data + 1, payload + 1, used_bytes - 1);  in efx_bootcfg_read()
974 	if (used_bytes < size)  in efx_bootcfg_read()
975 		(void) memset(data + used_bytes, 0, size - used_bytes);  in efx_bootcfg_read()
1022 	size_t used_bytes;  in efx_bootcfg_write()  local
1051 	if ((rc = efx_dhcp_verify(data, size, &used_bytes)) != 0)  in efx_bootcfg_write()
1058 	if ((used_bytes < 2) || ((uint8_t)data[used_bytes - 1] !=  in efx_bootcfg_write()
1066 	if (used_bytes > MIN(sector_length, BOOTCFG_MAX_SIZE)) {  in efx_bootcfg_write()
1097 	(void) memcpy(partn_data + sector_offset, data, used_bytes);  in efx_bootcfg_write()
1099 	checksum = efx_dhcp_csum(data, used_bytes);  in efx_bootcfg_write()