if ((rc = efx_nvram_read_chunk(enp, EFX_NVRAM_BOOTROM_CFG,
sector_offset, (caddr_t)payload, sector_length)) != 0) {
(void) efx_nvram_rw_finish(enp, EFX_NVRAM_BOOTROM_CFG, NULL);
if ((rc = efx_nvram_read_chunk(enp, EFX_NVRAM_BOOTROM_CFG,
sector_offset, (caddr_t)payload, sector_length)) != 0) {
(void) efx_nvram_rw_finish(enp, EFX_NVRAM_BOOTROM_CFG, NULL);