redpine: Doesn't build with GCC 9.1.0
/home/dos/git/purism/kernel-builder/RS9116.NB0.NL.LNX.PURISM_FW_UPGRADE.1.0.5/rsi/rsi_91x_mgmt.c: In function 'rsi_mgmt_pkt_recv':
/home/dos/git/purism/kernel-builder/RS9116.NB0.NL.LNX.PURISM_FW_UPGRADE.1.0.5/rsi/rsi_91x_mgmt.c:3731:3: error: this statement may fall through [-Werror=implicit-fallthrough=]
3731 | switch(msg[15]) {
| ^~~~~~
/home/dos/git/purism/kernel-builder/RS9116.NB0.NL.LNX.PURISM_FW_UPGRADE.1.0.5/rsi/rsi_91x_mgmt.c:3767:2: note: here
3767 | case RX_DOT11_MGMT:
| ^~~~