huawei/mm-modem-helpers-huawei.c: In function ‘parse_mode_combination_string’:
huawei/mm-modem-helpers-huawei.c:991:20: error: this statement may fall through [-Werror=implicit-fallthrough=]
991 | *preferred = MM_MODEM_MODE_NONE;
| ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~
huawei/mm-modem-helpers-huawei.c:993:5: note: here
993 | default:
| ^~~~~~~