kern.warn - OpenWrt 21.02-SNAPSHOT r16470

Tue Feb 1 19:02:25 2022 kern.warn kernel: [11134.332928] ------------[ cut here ]------------
Tue Feb 1 19:02:25 2022 kern.warn kernel: [11134.342200] WARNING: CPU: 1 PID: 1096 at target-mipsel_24kc_musl/linux-ramips_mt7621/mt76-2021-12-03-678071ef/mt7603/mac.c:208 0x860546a4 [mt7603e@8ad96439+0x96c0]
Tue Feb 1 19:02:25 2022 kern.warn kernel: [11134.371356] Modules linked in: ksmbd qcserial pppoe ppp_async option iptable_nat cdc_mbim xt_state xt_nat xt_conntrack xt_REDIRECT xt_MASQUERADE xt_FLOWOFFLOAD xt_CT wireguard usb_wwan sierra_net sierra rndis_host qmi_wwan pppox ppp_generic nf_nat_tftp nf_nat_snmp_basic nf_nat_sip nf_nat_pptp nf_nat_irc nf_nat_h323 nf_nat_amanda nf_nat nf_flow_table_hw nf_flow_table nf_conntrack_tftp nf_conntrack_snmp nf_conntrack_sip nf_conntrack_pptp nf_conntrack_netlink nf_conntrack_irc nf_conntrack_h323 nf_conntrack_broadcast nf_conntrack_amanda nf_conntrack mt76x2e mt76x2_common mt76x02_lib mt7603e mt76 mac80211 libchacha20poly1305 libblake2s ipt_REJECT huawei_cdc_ncm cfg80211 cdc_ncm cdc_ether xt_time xt_tcpudp xt_multiport xt_mark xt_mac xt_limit xt_comment xt_TCPMSS xt_LOG usbserial usbnet usblp ts_kmp ts_fsm ts_bm slhc poly1305_mips nf_reject_ipv4 nf_log_ipv4 nf_defrag_ipv6 nf_defrag_ipv4 libcurve25519_generic libcrc32c libblake2s_generic iptable_raw iptable_mangle iptable_filter ip_tables
Tue Feb 1 19:02:25 2022 kern.warn kernel: [11134.371637] crc_ccitt compat chacha_mips cdc_wdm cdc_acm asn1_decoder fuse ledtrig_usbport 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 nf_log_ipv6 nf_log_common ip6table_mangle ip6table_filter ip6_tables ip6t_REJECT x_tables nf_reject_ipv6 ip6_udp_tunnel udp_tunnel tun vfat fat nls_utf8 nls_iso8859_1 nls_cp437 sha512_generic sha256_generic libsha256 seqiv jitterentropy_rng drbg md5 md4 kpp hmac ghash_generic gf128mul gcm ecb des_generic libdes ctr cmac ccm arc4 uas usb_storage leds_gpio xhci_plat_hcd xhci_pci xhci_mtk xhci_hcd fsl_mph_dr_of ehci_platform ehci_fsl sd_mod scsi_mod ehci_hcd gpio_button_hotplug f2fs ext4 mbcache jbd2 usbcore nls_base usb_common mii crc32c_generic crc32_generic
Tue Feb 1 19:02:25 2022 kern.warn kernel: [11134.712619] CPU: 1 PID: 1096 Comm: napi/phy0-7 Not tainted 5.4.171 #0
Tue Feb 1 19:02:25 2022 kern.warn kernel: [11134.725424] Stack : 00000000 80850000 00021c08 8007e1c0 00000000 00000000 00000000 00000000
Tue Feb 1 19:02:25 2022 kern.warn kernel: [11134.742053] 00000000 00000000 00000000 00000000 00000000 00000001 86a13c00 ca8c99e8
Tue Feb 1 19:02:25 2022 kern.warn kernel: [11134.758680] 86a13c98 00000000 00000000 00000000 00000038 805ecf24 65746e69 2e352064
Tue Feb 1 19:02:25 2022 kern.warn kernel: [11134.775307] 00000000 00000229 00000000 000adfab 00000000 86a13be0 00000000 860546a4
Tue Feb 1 19:02:25 2022 kern.warn kernel: [11134.791935] 00000009 00003a98 80000000 00000001 00000000 8035d420 00000004 80820004
Tue Feb 1 19:02:25 2022 kern.warn kernel: [11134.808562] ...
Tue Feb 1 19:02:25 2022 kern.warn kernel: [11134.813418] Call Trace:
Tue Feb 1 19:02:25 2022 kern.warn kernel: [11134.813432] [<8007e1c0>] 0x8007e1c0
Tue Feb 1 19:02:25 2022 kern.warn kernel: [11134.825275] [<805ecf24>] 0x805ecf24
Tue Feb 1 19:02:25 2022 kern.warn kernel: [11134.832235] [<860546a4>] 0x860546a4 [mt7603e@8ad96439+0x96c0]
Tue Feb 1 19:02:25 2022 kern.warn kernel: [11134.843662] [<8035d420>] 0x8035d420
Tue Feb 1 19:02:25 2022 kern.warn kernel: [11134.850618] [<8000b05c>] 0x8000b05c
Tue Feb 1 19:02:25 2022 kern.warn kernel: [11134.857551] [<8000b064>] 0x8000b064
Tue Feb 1 19:02:25 2022 kern.warn kernel: [11134.864483] [<805d2864>] 0x805d2864
Tue Feb 1 19:02:25 2022 kern.warn kernel: [11134.871414] [<8007ac68>] 0x8007ac68
Tue Feb 1 19:02:25 2022 kern.warn kernel: [11134.878346] [<8002c410>] 0x8002c410
Tue Feb 1 19:02:25 2022 kern.warn kernel: [11134.885293] [<860546a4>] 0x860546a4 [mt7603e@8ad96439+0x96c0]
Tue Feb 1 19:02:25 2022 kern.warn kernel: [11134.896723] [<8002c4b8>] 0x8002c4b8
Tue Feb 1 19:02:25 2022 kern.warn kernel: [11134.903694] [<860546a4>] 0x860546a4 [mt7603e@8ad96439+0x96c0]
Tue Feb 1 19:02:25 2022 kern.warn kernel: [11134.915158] [<86107d5c>] 0x86107d5c [mac80211@a5bb298e+0x81d40]
Tue Feb 1 19:02:25 2022 kern.warn kernel: [11134.927000] [<86054840>] 0x86054840 [mt7603e@8ad96439+0x96c0]
Tue Feb 1 19:02:25 2022 kern.warn kernel: [11134.938449] [<86b961cc>] 0x86b961cc [mt76@16ef5283+0xac40]
Tue Feb 1 19:02:25 2022 kern.warn kernel: [11134.949382] [<86b93078>] 0x86b93078 [mt76@16ef5283+0xac40]
Tue Feb 1 19:02:25 2022 kern.warn kernel: [11134.960359] [<86051bc0>] 0x86051bc0 [mt7603e@8ad96439+0x96c0]
Tue Feb 1 19:02:25 2022 kern.warn kernel: [11134.971856] [<86b94f54>] 0x86b94f54 [mt76@16ef5283+0xac40]
Tue Feb 1 19:02:25 2022 kern.warn kernel: [11134.982890] [<86b916a8>] 0x86b916a8 [mt76@16ef5283+0xac40]
Tue Feb 1 19:02:25 2022 kern.warn kernel: [11134.993821] [<80069444>] 0x80069444
Tue Feb 1 19:02:25 2022 kern.warn kernel: [11135.000829] [<8043d61c>] 0x8043d61c
Tue Feb 1 19:02:25 2022 kern.warn kernel: [11135.007762] [<8043d504>] 0x8043d504
Tue Feb 1 19:02:25 2022 kern.warn kernel: [11135.014709] [<805ee4a8>] 0x805ee4a8
Tue Feb 1 19:02:25 2022 kern.warn kernel: [11135.021655] [<8043d6c0>] 0x8043d6c0
Tue Feb 1 19:02:25 2022 kern.warn kernel: [11135.028588] [<8043d6dc>] 0x8043d6dc
Tue Feb 1 19:02:25 2022 kern.warn kernel: [11135.035534] [<8004b724>] 0x8004b724
Tue Feb 1 19:02:25 2022 kern.warn kernel: [11135.042528] [<8004bc34>] 0x8004bc34
Tue Feb 1 19:02:25 2022 kern.warn kernel: [11135.049460] [<8004baf4>] 0x8004baf4
Tue Feb 1 19:02:25 2022 kern.warn kernel: [11135.056418] [<8004baf4>] 0x8004baf4
Tue Feb 1 19:02:25 2022 kern.warn kernel: [11135.063365] [<8004baf4>] 0x8004baf4
Tue Feb 1 19:02:25 2022 kern.warn kernel: [11135.070297] [<80006718>] 0x80006718
Tue Feb 1 19:02:25 2022 kern.warn kernel: [11135.077238]
Tue Feb 1 19:02:25 2022 kern.warn kernel: [11135.080765] ---[ end trace 262e0c61c61ce2e0 ]---

Start at target-mipsel_24kc_musl/linux-ramips_mt7621/mt76-2021-12-03-678071ef/mt7603/mac.c:208 and inspect the warning context for the mt7603e driver. Reproduce on OpenWrt 21.02-SNAPSHOT r16470 with kernel 5.4.171 and the reported hardware, then determine what triggers the warning. Done means the cause is identified and the warning no longer occurs under the reproducing conditions.