I noticed something weird in the log - warning about cpu and i was trying to copy a big file over wifi but it always failed.
564408.034951] ------------[ cut here ]------------
[564408.035021] WARNING: CPU: 0 PID: 0 at /home/beast/beast/workspace/omnia-stable/build_dir/target-arm_cortex-a9+vfpv3_musl-1.1.15_eabi/linux-mvebu/compat-wireless-2017-01-31/drivers/net/wireless/ath/ath10k/htt_rx.c:1006 ath10k_htt_t2h_msg_handler+0x14fc/0x17ac ath10k_core
[564408.035026] Modules linked in: qcserial option iptable_nat ath9k usb_wwan rndis_host qmi_wwan pppoe nf_nat_pptp nf_nat_ipv4 nf_nat_amanda nf_conntrack_pptp nf_conntrack_netlink nf_conntrack_ipv6 nf_conntrack_ipv4 nf_conntrack_amanda ipt_REJECT ipt_MASQUERADE ebtable_nat ebtable_filter ebtable_broute cdc_ether ath9k_common armada_thermal xt_time xt_tcpudp xt_tcpmss xt_statistic xt_state xt_recent xt_nat xt_multiport xt_mark xt_mac xt_limit xt_length xt_id xt_hl xt_helper xt_ecn xt_dscp xt_conntrack xt_connmark xt_connlimit xt_connbytes xt_comment xt_TCPMSS xt_REDIRECT xt_LOG xt_HL xt_DSCP xt_CT xt_CLASSIFY usbserial usbnet ums_usbat ums_sddr55 ums_sddr09 ums_karma ums_jumpshot ums_isd200 ums_freecom ums_datafab ums_cypress ums_alauda ts_kmp ts_fsm ts_bm thermal_sys pppox ppp_mppe ppp_async nfnetlink nf_reject_ipv4 nf_nat_tftp nf_nat_snmp_basic nf_nat_sip nf_nat_redirect nf_nat_proto_gre nf_nat_masquerade_ipv4 nf_nat_irc nf_nat_h323 nf_nat_ftp nf_nat nf_log_ipv4 nf_defrag_ipv6 nf_defrag_ipv4 nf_conntrack_tftp nf_conntrack_snmp nf_conntrack_sip nf_conntrack_rtcache nf_conntrack_proto_gre nf_conntrack_irc nf_conntrack_h323 nf_conntrack_ftp nf_conntrack_broadcast nf_conntrack mvsdio iptable_raw iptable_mangle iptable_filter ipt_ECN ip_tables hwmon ebtables ebt_vlan ebt_stp ebt_redirect ebt_pkttype ebt_mark_m ebt_mark ebt_limit ebt_among ebt_802_3 crc_ccitt cdc_wdm ath9k_hw fuse sch_teql sch_tbf sch_sfq sch_red sch_prio sch_pie sch_netem sch_htb sch_gred sch_fq sch_dsmark sch_codel em_text em_nbyte em_meta em_cmp cls_basic act_vlan act_police act_pedit act_nat act_ipt act_gact act_csum act_bpf act_skbedit act_mirred em_u32 cls_u32 cls_tcindex cls_flow cls_route cls_fw sch_hfsc sch_ingress ath10k_pci ath10k_core ath mac80211 cfg80211 compat ledtrig_usbdev ledtrig_oneshot xt_LED ledtrig_morse ledtrig_heartbeat ledtrig_gpio cryptodev ip6t_REJECT nf_reject_ipv6 nf_log_ipv6 nf_log_common ip6table_raw ip6table_mangle ip6table_filter ip6_tables x_tables pppoatm ppp_generic slhc nfsd nfsv3 msdos ip_gre gre ifb sit ip6_tunnel tunnel6 tunnel4 ip_tunnel tun snd_compress snd_pcm_oss snd_mixer_oss snd_pcm snd_timer snd_rawmidi snd_seq_device snd_hwdep snd input_core soundcore rxkad vfat fat udf crc_itu_t ntfs nfs_layout_nfsv41_files nfsv4 nfs auth_rpcgss oid_registry lockd sunrpc grace minix isofs hfsplus hfs cramfs configfs cifs autofs4 kafs af_rxrpc dns_resolver dm_crypt dm_mirror dm_region_hash dm_log dm_mod br2684 atm multipath fscache raid456 async_raid6_recov async_pq async_xor async_memcpy async_tx raid10 raid1 raid0 linear md_mod nls_utf8 nls_koi8_r nls_cp1255 nls_iso8859_6 nls_iso8859_2 nls_iso8859_15 nls_iso8859_13 nls_iso8859_1 nls_cp932 nls_cp866 nls_cp864 nls_cp862 nls_cp852 nls_cp850 nls_cp775 nls_cp437 nls_cp1251 nls_cp1250 xts algif_skcipher algif_hash af_alg sha512_generic sha256_generic sha1_generic seqiv jitterentropy_rng drbg pcbc md5 md4 marvell_cesa hmac gf128mul fcrypt ecb des_generic ctr cmac ccm cbc authenc xhci_plat_hcd xhci_pci xhci_hcd uhci_hcd ledtrig_transient ahci_platform uas xfs libcrc32c jfs f2fs exfat mii aead crypto_null
[564408.035377] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.4.178-7bc33afbb1b35f5830b2b1b42c9cd8a0-0 #1
[564408.035381] Hardware name: Marvell Armada 380/385 (Device Tree)
[564408.035384] Backtrace:
[564408.035395] [] (dump_backtrace) from [] (show_stack+0x18/0x1c)
[564408.035398] r6:00000000 r5:60000113 r4:c0770d28 r3:00000000
[564408.035412] [] (show_stack) from [] (dump_stack+0x98/0xac)
[564408.035420] [] (dump_stack) from [] (warn_slowpath_common+0x8c/0xbc)
[564408.035423] r6:000003ee r5:bf728e74 r4:00000000 r3:00000006
[564408.035433] [] (warn_slowpath_common) from [] (warn_slowpath_null+0x24/0x2c)
[564408.035436] r8:00000000 r7:c07662b8 r6:00000007 r5:ed1c95e0 r4:eb573000
[564408.035467] [] (warn_slowpath_null) from [] (ath10k_htt_t2h_msg_handler+0x14fc/0x17ac [ath10k_core])
[564408.035502] [] (ath10k_htt_t2h_msg_handler [ath10k_core]) from [] (ath10k_htt_txrx_compl_task+0xc7c/0x12a0 [ath10k_core])
[564408.035505] r10:ed1c95e0 r9:c075fd68 r8:00000000 r7:c07662b8 r6:00000007 r5:c07662b8
[564408.035514] r4:eb573840
[564408.035541] [] (ath10k_htt_txrx_compl_task [ath10k_core]) from [] (ath10k_pci_napi_poll+0x50/0x108 [ath10k_pci])
[564408.035545] r10:035cd1cb r9:00000000 r8:c075fe00 r7:00000040 r6:ed1c9820 r5:ed1c95e0
[564408.035553] r4:ed1cd220
[564408.035569] [] (ath10k_pci_napi_poll [ath10k_pci]) from [] (net_rx_action+0x13c/0x308)
[564408.035572] r9:c0760100 r8:c075fe00 r7:0000012c r6:00000040 r5:00000001 r4:ed1cd220
[564408.035586] [] (net_rx_action) from [] (__do_softirq+0x114/0x260)
[564408.035589] r10:00000000 r9:00000003 r8:00000100 r7:c075e000 r6:40000003 r5:c0760080
[564408.035597] r4:c076008c
[564408.035603] [] (__do_softirq) from [] (irq_exit+0x80/0xb8)
[564408.035606] r10:c075ff78 r9:f0803100 r8:ee808000 r7:00000001 r6:00000000 r5:00000000
[564408.035614] r4:c0758ff0
[564408.035623] [] (irq_exit) from [] (__handle_domain_irq+0x68/0xb8)
[564408.035625] r4:c0758ff0 r3:f0802100
[564408.035633] [] (__handle_domain_irq) from [] (gic_handle_irq+0x50/0x94)
[564408.035636] r8:c075ff08 r7:f080210c r6:c0761038 r5:c077117c r4:f0802100 r3:c075ff08
[564408.035647] [] (gic_handle_irq) from [] (__irq_svc+0x54/0x70)
[564408.035651] Exception stack(0xc075ff08 to 0xc075ff50)
[564408.035657] ff00: 00000001 00000000 c075ff68 c000b520 c075e000 c0760498
[564408.035662] ff20: c0760450 00000000 00000000 c075b118 c075ff78 c075ff64 c075ff68 c075ff58
[564408.035667] ff40: c00192f4 c00192f8 60000013 ffffffff
[564408.035669] r9:c075b118 r8:00000000 r7:c075ff3c r6:ffffffff r5:60000013 r4:c00192f8
[564408.035687] [] (arch_cpu_idle) from [] (default_idle_call+0x28/0x34)
[564408.035693] [] (default_idle_call) from [] (cpu_startup_entry+0x158/0x238)
[564408.035699] [] (cpu_startup_entry) from [] (rest_init+0x80/0x84)
[564408.035701] r7:c07603c0
[564408.035711] [] (rest_init) from [] (start_kernel+0x460/0x46c)
[564408.035717] [] (start_kernel) from [<0000807c>] (0x807c)
[564408.035721] —[ end trace 6f18c1b10956756f ]—