restart wlan9

[tobias.e]

Hi everybody, 

how do i re-enable wlan9?

I need to connect to two Wifis, so the interface wlan0 is connected to my "main" network, and wlan9 provides an AP for some devices.
After several hours, wlan9 is gone.

is there a way to re-enable wlan9? My Linux is a little rusty, ifup wlan9 did not work.  

I am not sure if these errors are related:

Code:

root@openplotter:~# dmesg | tail -40
[   21.073203]  MAI: soc_pcm_open() failed (-19)
[   24.232136] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[   31.699843] cam-dummy-reg: disabling
[   59.832513] uart-pl011 fe201000.serial: no DMA platform data
[ 1829.955040] ieee80211 phy0: brcmf_run_escan: error (-52)
[ 1829.955061] ieee80211 phy0: brcmf_cfg80211_scan: scan error (-52)
[14783.193102] ieee80211 phy0: brcmf_run_escan: error (-52)
[14783.193138] ieee80211 phy0: brcmf_cfg80211_scan: scan error (-52)
[27436.486025] ieee80211 phy0: brcmf_run_escan: error (-52)
[27436.486045] ieee80211 phy0: brcmf_cfg80211_scan: scan error (-52)
[40089.903233] ieee80211 phy0: brcmf_run_escan: error (-52)
[40089.903276] ieee80211 phy0: brcmf_cfg80211_scan: scan error (-52)
[46373.891829] ieee80211 phy0: brcmf_fw_crashed: Firmware has halted or crashed
[46374.289295] ieee80211 phy0: brcmf_netdev_start_xmit: xmit rejected state=0
[46374.417147] ieee80211 phy0: brcmf_fil_cmd_data: bus is down. we have nothing to do.
[46374.417164] ieee80211 phy0: brcmf_cfg80211_stop_ap: SET SSID error (-5)
[46374.417171] ieee80211 phy0: brcmf_fil_cmd_data: bus is down. we have nothing to do.
[46374.417175] ieee80211 phy0: brcmf_cfg80211_stop_ap: BRCMF_C_DOWN error -5
[46374.417180] ieee80211 phy0: brcmf_fil_cmd_data: bus is down. we have nothing to do.
[46374.417184] ieee80211 phy0: brcmf_cfg80211_stop_ap: setting AP mode failed -5
[46374.417189] ieee80211 phy0: brcmf_fil_cmd_data: bus is down. we have nothing to do.
[46374.417193] ieee80211 phy0: brcmf_fil_cmd_data: bus is down. we have nothing to do.
[46374.417197] ieee80211 phy0: brcmf_cfg80211_stop_ap: BRCMF_C_UP error -5
[46374.417207] ieee80211 phy0: brcmf_fil_cmd_data: bus is down. we have nothing to do.
[46374.417212] ieee80211 phy0: brcmf_set_mpc: fail to set mpc
[46374.417217] ieee80211 phy0: brcmf_fil_cmd_data: bus is down. we have nothing to do.
[46374.417221] ieee80211 phy0: brcmf_fil_cmd_data: bus is down. we have nothing to do.
[46374.953043] ieee80211 phy0: brcmf_fil_cmd_data: bus is down. we have nothing to do.
[46374.953060] ieee80211 phy0: brcmf_cfg80211_get_tx_power: error (-5)
[46375.565681] brcmfmac: brcmf_sdiod_probe: Failed to set F1 blocksize
[46375.565717] brcmfmac: brcmf_sdio_bus_reset: Failed to probe after sdio device reset: ret -123
[46375.565991] mmc1: card 0001 removed
[46375.676733] mmc1: new high speed SDIO card at address 0001
[46375.677532] brcmfmac: F1 signature read @0x18000000=0x15264345
[46375.682522] brcmfmac: brcmf_fw_alloc_request: using brcm/brcmfmac43455-sdio for chip BCM4345/6
[46375.934768] brcmfmac: brcmf_fw_alloc_request: using brcm/brcmfmac43455-sdio for chip BCM4345/6
[46375.938885] brcmfmac: brcmf_c_preinit_dcmds: Firmware: BCM4345/6 wl0: Nov  1 2021 00:37:25 version 7.45.241 (1a2f2fa CY) FWID 01-703fd60
[46385.880223] brcmfmac: brcmf_cfg80211_set_power_mgmt: power save enabled
[46391.337783] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[47336.175710] TCP: request_sock_TCP: Possible SYN flooding on port 8080. Sending cookies.  Check SNMP counters.

Best regards, 
Tobias