That happened on r21897-d40f59825a - when I enabled WLAN I started seeing Banana PI dropping from network completly. After investigation I noticed that it seems to crash in kernel:
[ 603.909990] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000008
[ 603.918768] Mem abort info:
[ 603.921556] ESR = 0x0000000096000005
[ 603.925289] EC = 0x25: DABT (current EL), IL = 32 bits
[ 603.930587] SET = 0, FnV = 0
[ 603.933626] EA = 0, S1PTW = 0
[ 603.936752] FSC = 0x05: level 1 translation fault
[ 603.941614] Data abort info:
[ 603.944478] ISV = 0, ISS = 0x00000005
[ 603.948296] CM = 0, WnR = 0
[ 603.951251] user pgtable: 4k pages, 39-bit VAs, pgdp=0000000045e98000
[ 603.957671] [0000000000000008] pgd=0000000000000000, p4d=0000000000000000, pud=0000000000000000
[ 603.966354] Internal error: Oops: 96000005 [#1] SMP
[ 603.971214] Modules linked in: pppoe ppp_async nft_fib_inet nf_flow_table_ipv6 nf_flow_table_ipv4 nf_flow_table_inet pppox ppp_generic nft_reject_ipv6 nft_reject_ipv4 nft_reject_inet nft_reject nft_redir nft_qn
[ 604.040226] CPU: 3 PID: 1592 Comm: hostapd Not tainted 5.15.89 #0
[ 604.046299] Hardware name: Bananapi BPI-R3 (DT)
[ 604.050812] pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[ 604.057752] pc : sta_set_sinfo+0xa10/0xbb0 [mac80211]
[ 604.062822] lr : sta_set_sinfo+0x5b4/0xbb0 [mac80211]
[ 604.067871] sp : ffffffc00a1fb7a0
[ 604.071169] x29: ffffffc00a1fb7a0 x28: 0000000000000001 x27: ffffffc00a1fbdd0
[ 604.078284] x26: ffffff800007e880 x25: ffffff8005404900 x24: ffffff80054e8735
[ 604.085400] x23: 000000000009f15c x22: ffffff80057ccb00 x21: 0000058d1783bf82
[ 604.092517] x20: ffffff80054e8000 x19: ffffff8003da8900 x18: 0000000000000000
[ 604.099631] x17: 00000000000007c0 x16: ffffffc008ee6000 x15: 00000000000003e0
[ 604.106747] x14: ffffff80054e8df8 x13: ffffff80054e8df8 x12: 0000000000000000
[ 604.113863] x11: 0000000000000000 x10: ffffff80054e8e00 x9 : 0000000000000000
[ 604.120977] x8 : ffffff8003da8a00 x7 : 0000000000002010 x6 : ffffff8003b303a0
[ 604.128093] x5 : ffffff8003b30880 x4 : 0000000000000000 x3 : ffffff8003da8944
[ 604.135207] x2 : 0000000000000000 x1 : 0000000000000001 x0 : 0000000000000000
[ 604.142322] Call trace:
[ 604.144755] sta_set_sinfo+0xa10/0xbb0 [mac80211]
[ 604.149461] sta_set_sinfo+0xb0c/0xbb0 [mac80211]
[ 604.154163] sta_info_destroy_addr_bss+0x4c/0x70 [mac80211]
[ 604.159733] ieee80211_color_change_finish+0x1bf8/0x1e80 [mac80211]
[ 604.165994] cfg80211_check_station_change+0x1384/0x4720 [cfg80211]
[ 604.172254] genl_family_rcv_msg_doit+0xb4/0x110
[ 604.176857] genl_rcv_msg+0xd0/0x1c0
[ 604.180416] netlink_rcv_skb+0x58/0x120
[ 604.184235] genl_rcv+0x34/0x50
[ 604.187361] netlink_unicast+0x1f0/0x2ec
[ 604.191270] netlink_sendmsg+0x19c/0x3d0
[ 604.195178] ____sys_sendmsg+0x21c/0x260
[ 604.199089] ___sys_sendmsg+0x80/0xf0
[ 604.202735] __sys_sendmsg+0x44/0xa0
[ 604.206295] __arm64_sys_sendmsg+0x20/0x30
[ 604.210374] invoke_syscall.constprop.0+0x4c/0xe0
[ 604.215061] do_el0_svc+0x40/0xd0
[ 604.218359] el0_svc+0x14/0x50
[ 604.221401] el0t_64_sync_handler+0xe0/0x110
[ 604.225655] el0t_64_sync+0x158/0x15c
[ 604.229305] Code: d3441c42 12000c00 8b020cc2 f9409c42 (f9400446)
[ 604.235378] ---[ end trace 460a361aac9e5e4a ]---
spi-nand: spi_nand spi_nand@1: Winbond SPI NAND was found.
spi-nand: spi_nand spi_nand@1: 128 MiB, block size: 128 KiB, page size: 2048, OOB size: 64
jedec_spi_nor spi_nor@0: unrecognized JEDEC id bytes: 00, ef, aa
After that router rebooted into NAND despite boot config being eMMC and subsequent reboots went to NAND. Is it a known problem? How to WAR / where to report it.
I tried to disable WLAN roaming and update to newest snapshot (r21950-90dbdb4941) so I’ll see how it will go.