4.14.123 RPI AX88179 Drive causes crash

Start with the reported 4.14.123 Raspberry Pi 2 environment and the ax88179_178a driver, then follow the NETDEV WATCHDOG timeout through net/sched/sch_generic.c. Reproduce the idle-interface failure and determine what prevents the transmit queue from completing; done means the adapter no longer crashes or times out under the described idle-use scenario.

I am using Openwrt and my device is RPI2
I used two AX88179s as LAN or WAN
But after a while, when a network card has no data transmission, it will crash.
The log is as follows
Normal use for a while:
[ 5208.757324] blest is not available
[ 5210.176208] blest is not available
[ 5213.882767] blest is not available
[ 5219.823918] blest is not available
[ 9157.107129] ------------[ cut here ]------------
[ 9157.113027] WARNING: CPU: 0 PID: 0 at net/sched/sch_generic.c:320 dev_watchdog+0x16c/0x268
[ 9157.123672] NETDEV WATCHDOG: eth1 (ax88179_178a): transmit queue 0 timed out
[ 9157.132056] Modules linked in: rtl8192cu rtl8192c_common rtl_usb rt2800usb rt2800lib qcserial option ipw brcmfmac usb_wwan usb_serial_simple ti_usb_3410_5052 sierra rtlwifi rtl8xxxu rt2x00usb rt2x00lib pppoe ppp_async pl2303 oti6858 nf_nat_pptp nf_conntrack_pptp mt7601u mos7720 mmc_spi mct_u232 mac80211 keyspan iptable_nat ipt_REJECT ipt_MASQUERADE garmin_gps ftdi_sio ebtable_nat ebtable_filter ebtable_broute cypress_m8 cp210x ch341 cfg80211 cdc_mbim belkin_sa bas_gigaset ark3116 xt_time xt_tcpudp xt_tcpmss xt_statistic xt_state xt_socket xt_recent xt_quota xt_pkttype xt_owner xt_ndpi xt_nat xt_multiport xt_mark xt_mac xt_limit xt_length xt_iface xt_hl xt_helper xt_hashlimit xt_ecn xt_dscp xt_conntrack xt_connmark xt_connlimit xt_connbytes xt_condition xt_comment xt_addrtype xt_TRACE xt_TPROXY xt_TCPMSS
[ 9157.217624] xt_REDIRECT xt_LOG xt_IPMARK xt_HL xt_FLOWOFFLOAD xt_DSCP xt_CT xt_CLASSIFY xt_ACCOUNT visor usbserial usbhid usb_gigaset ts_fsm ts_bm sr9700 sierra_net ser_gigaset rtl8150 rndis_host r8712u r8152 qmi_wwan pppox ppp_generic pegasus of_mmc_spi nf_socket_ipv6 nf_socket_ipv4 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_conntrack_ipv4 nf_nat_ipv4 nf_nat_h323 nf_nat_ftp nf_nat_amanda nf_log_ipv4 nf_flow_table_hw nf_flow_table nf_defrag_ipv4 nf_conntrack_tftp nf_conntrack_snmp nf_conntrack_sip nf_conntrack_rtcache nf_conntrack_proto_gre nf_conntrack_netlink nf_conntrack_irc nf_conntrack_h323 nf_conntrack_ftp nf_conntrack_broadcast ts_kmp nf_conntrack_amanda mcs7830 macvlan kaweth kalmia iptable_raw iptable_mangle
[ 9157.305959] iptable_filter ipt_ECN ipheth ip6table_raw ip_tables huawei_cdc_ncm hso hid_generic gigaset ezusb ethoc ebtables ebt_vlan ebt_stp ebt_redirect ebt_pkttype ebt_mark_m ebt_mark ebt_limit ebt_among ebt_802_3 dm9601 crc7 crc_itu_t crc_ccitt compat_xtables compat cdc_wdm cdc_subset cdc_ncm cdc_ether cdc_eem cdc_acm brcmutil ax88179_178a asix arptable_filter arpt_mangle arp_tables sch_cake sch_teql sch_sfq sch_red sch_prio sch_pie sch_multiq sch_mqprio sch_gred sch_fq sch_dsmark sch_codel em_text em_nbyte em_meta em_cmp cls_flower act_vlan act_simple act_police act_pedit act_ipt act_gact act_csum sch_tbf sch_ingress sch_htb sch_hfsc em_u32 cls_u32 cls_tcindex cls_route cls_matchall cls_fw cls_flow cls_basic act_skbedit act_mirred snd_bcm2835 hid evdev i2c_gpio i2c_algo_bit i2c_dev i2c_core
[ 9157.394882] spi_ks8995 xt_set ip_set_list_set ip_set_hash_netportnet ip_set_hash_netport ip_set_hash_netnet ip_set_hash_netiface ip_set_hash_net ip_set_hash_mac ip_set_hash_ipportnet ip_set_hash_ipportip ip_set_hash_ipport ip_set_hash_ipmark ip_set_hash_ip ip_set_bitmap_port ip_set_bitmap_ipmac ip_set_bitmap_ip ip_set nfnetlink ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6t_NPT ip6t_MASQUERADE nf_nat_masquerade_ipv6 nf_nat nf_conntrack nf_log_ipv6 nf_log_common ip6table_mangle ip6table_filter ip6_tables ip6t_REJECT x_tables nf_reject_ipv6 isdn_bsdcomp dss1_divert isdn slhc ifb dm9000 sit sctp libcrc32c tunnel4 ip_tunnel veth tun snd_rawmidi snd_seq_device snd_pcm_oss snd_pcm_dmaengine snd_pcm snd_timer snd_mixer_oss snd_hwdep snd_compress snd soundcore mISDN_dsp l1oip mISDN_core
[ 9157.483827] nls_utf8 sha256_generic seqiv jitterentropy_rng drbg md5 hmac ghash_generic gf128mul gcm ctr nls_iso8859_1 nls_cp437 xhci_plat_hcd xhci_hcd ehci_platform ehci_hcd gpio_button_hotplug ptp broadcom bcm_phy_lib pps_core
[ 9157.509826] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.14.123 #0
[ 9157.517784] Hardware name: BCM2835
[ 9157.523009] [<8010f78c>] (unwind_backtrace) from [<8010af58>] (show_stack+0x10/0x14)
[ 9157.534357] [<8010af58>] (show_stack) from [<805d21b0>] (dump_stack+0x98/0xb8)
[ 9157.543422] [<805d21b0>] (dump_stack) from [<80117fe8>] (__warn+0xe4/0x100)
[ 9157.552187] [<80117fe8>] (__warn) from [<8011803c>] (warn_slowpath_fmt+0x38/0x48)
[ 9157.563156] [<8011803c>] (warn_slowpath_fmt) from [<804dfdec>] (dev_watchdog+0x16c/0x268)
[ 9157.574830] [<804dfdec>] (dev_watchdog) from [<8016947c>] (call_timer_fn.constprop.6+0x28/0x94)
[ 9157.587029] [<8016947c>] (call_timer_fn.constprop.6) from [<801697c4>] (run_timer_softirq+0x1c0/0x44c)
[ 9157.599846] [<801697c4>] (run_timer_softirq) from [<80101570>] (__do_softirq+0xe0/0x240)
[ 9157.611422] [<80101570>] (__do_softirq) from [<8011d01c>] (irq_exit+0xd4/0x138)
[ 9157.620523] [<8011d01c>] (irq_exit) from [<80159080>] (__handle_domain_irq+0x9c/0xac)
[ 9157.631807] [<80159080>] (__handle_domain_irq) from [<8010bb0c>] (__irq_svc+0x6c/0x90)
[ 9157.643182] [<8010bb0c>] (__irq_svc) from [<801085d4>] (arch_cpu_idle+0x34/0x38)
[ 9157.654112] [<801085d4>] (arch_cpu_idle) from [<8014e0e4>] (do_idle+0xe0/0x1e0)
[ 9157.663238] [<8014e0e4>] (do_idle) from [<8014e440>] (cpu_startup_entry+0x18/0x1c)
[ 9157.674354] [<8014e440>] (cpu_startup_entry) from [<80800c20>] (start_kernel+0x358/0x364)
[ 9157.686206] ---[ end trace ac9d67b942685282 ]---