Wifi Driver

Model：Netgear R6220
Architektura：MediaTek MT7621 ver:1 eco:3
Wersja firmware：OpenWrt 21.02-SNAPSHOT r16329-b4c40a7efc

Mon Dec 6 15:57:00 2021 kern.warn kernel: [165089.576345] ------------[ cut here ]------------
Mon Dec 6 15:57:00 2021 kern.warn kernel: [165089.585846] WARNING: CPU: 0 PID: 1157 at /home/cezary/projekty/openwrt-21.02/openwrt/_common/build_dir/target-mipsel_24kc_musl/linux-ramips_mt7621/backports-5.10.68-1/net/mac80211/airtime.c:457 0x86157060 [mac80211@be866bb4+0x7f770]
Mon Dec 6 15:57:00 2021 kern.warn kernel: [165089.627143] 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
Mon Dec 6 15:57:00 2021 kern.warn kernel: [165089.627408] 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
Mon Dec 6 15:57:01 2021 kern.warn kernel: [165089.969126] CPU: 0 PID: 1157 Comm: mt76-tx phy1 Not tainted 5.4.154 #0
Mon Dec 6 15:57:01 2021 kern.warn kernel: [165089.982287] Stack : 00000000 80850000 00000000 8007e0d8 00000000 00000000 00000000 00000000
Mon Dec 6 15:57:01 2021 kern.warn kernel: [165089.999087] 00000000 00000000 00000000 00000000 00000000 00000001 8624dc30 583f1aaa
Mon Dec 6 15:57:01 2021 kern.warn kernel: [165090.015885] 8624dcc8 00000000 00000000 00000000 00000038 805ebea4 00000010 20646574
Mon Dec 6 15:57:01 2021 kern.warn kernel: [165090.032679] 00000000 00002015 00000000 6d203a6d 00000000 8624dc10 00000000 86157060
Mon Dec 6 15:57:01 2021 kern.warn kernel: [165090.049473] 00000009 00000014 00000004 00000002 00000010 8035cbf4 00000000 80820000
Mon Dec 6 15:57:01 2021 kern.warn kernel: [165090.066260] ...
Mon Dec 6 15:57:01 2021 kern.warn kernel: [165090.071283] Call Trace:
Mon Dec 6 15:57:01 2021 kern.warn kernel: [165090.071297] [<8007e0d8>] 0x8007e0d8
Mon Dec 6 15:57:01 2021 kern.warn kernel: [165090.083494] [<805ebea4>] 0x805ebea4
Mon Dec 6 15:57:01 2021 kern.warn kernel: [165090.090615] [<86157060>] 0x86157060 [mac80211@be866bb4+0x7f770]
Mon Dec 6 15:57:01 2021 kern.warn kernel: [165090.102564] [<8035cbf4>] 0x8035cbf4
Mon Dec 6 15:57:01 2021 kern.warn kernel: [165090.109714] [<8000b05c>] 0x8000b05c
Mon Dec 6 15:57:01 2021 kern.warn kernel: [165090.116814] [<8000b064>] 0x8000b064
Mon Dec 6 15:57:01 2021 kern.warn kernel: [165090.123911] [<805d17d8>] 0x805d17d8
Mon Dec 6 15:57:01 2021 kern.warn kernel: [165090.131014] [<8007ab80>] 0x8007ab80
Mon Dec 6 15:57:01 2021 kern.warn kernel: [165090.138121] [<8002c3d0>] 0x8002c3d0
Mon Dec 6 15:57:01 2021 kern.warn kernel: [165090.145247] [<86157060>] 0x86157060 [mac80211@be866bb4+0x7f770]
Mon Dec 6 15:57:01 2021 kern.warn kernel: [165090.157190] [<8002c478>] 0x8002c478
Mon Dec 6 15:57:01 2021 kern.warn kernel: [165090.164337] [<86157060>] 0x86157060 [mac80211@be866bb4+0x7f770]
Mon Dec 6 15:57:01 2021 kern.warn kernel: [165090.176288] [<861036f0>] 0x861036f0 [mac80211@be866bb4+0x7f770]
Mon Dec 6 15:57:01 2021 kern.warn kernel: [165090.188231] [<86157248>] 0x86157248 [mac80211@be866bb4+0x7f770]
Mon Dec 6 15:57:01 2021 kern.warn kernel: [165090.200220] [<86157328>] 0x86157328 [mac80211@be866bb4+0x7f770]
Mon Dec 6 15:57:01 2021 kern.warn kernel: [165090.212197] [<8041e98c>] 0x8041e98c
Mon Dec 6 15:57:01 2021 kern.warn kernel: [165090.219352] [<861a2a24>] 0x861a2a24 [mt76x02_lib@b899272b+0x9e00]
Mon Dec 6 15:57:01 2021 kern.warn kernel: [165090.231658] [<86050530>] 0x86050530 [mt76@d62f097c+0x9700]
Mon Dec 6 15:57:01 2021 kern.warn kernel: [165090.242824] [<86050530>] 0x86050530 [mt76@d62f097c+0x9700]
Mon Dec 6 15:57:01 2021 kern.warn kernel: [165090.253910] [<861a5004>] 0x861a5004 [mt76x02_lib@b899272b+0x9e00]
Mon Dec 6 15:57:01 2021 kern.warn kernel: [165090.266200] [<86050530>] 0x86050530 [mt76@d62f097c+0x9700]
Mon Dec 6 15:57:01 2021 kern.warn kernel: [165090.277296] [<860505d4>] 0x860505d4 [mt76@d62f097c+0x9700]
Mon Dec 6 15:57:01 2021 kern.warn kernel: [165090.288376] [<8004b6d4>] 0x8004b6d4
Mon Dec 6 15:57:01 2021 kern.warn kernel: [165090.295482] [<805ed83c>] 0x805ed83c
Mon Dec 6 15:57:01 2021 kern.warn kernel: [165090.302637] [<8004bbe4>] 0x8004bbe4
Mon Dec 6 15:57:01 2021 kern.warn kernel: [165090.309743] [<8004baa4>] 0x8004baa4
Mon Dec 6 15:57:01 2021 kern.warn kernel: [165090.316872] [<8004baa4>] 0x8004baa4
Mon Dec 6 15:57:01 2021 kern.warn kernel: [165090.324046] [<8004baa4>] 0x8004baa4
Mon Dec 6 15:57:01 2021 kern.warn kernel: [165090.331161] [<80006718>] 0x80006718
Mon Dec 6 15:57:01 2021 kern.warn kernel: [165090.338274]
Mon Dec 6 15:57:01 2021 kern.warn kernel: [165090.342159] ---[ end trace d028931e179ecc62 ]---

Start with the warning location at net/mac80211/airtime.c:457 and the kernel trace from the mt76-tx process. Review the listed mt76x02_lib, mt76x2_common, mt7603e, and mac80211 components, then reproduce the warning on the Netgear R6220 with the reported firmware and hardware. Done means identifying the cause of the warning and documenting or fixing it with a verified result.