Hi all, I recently updated to kernel 5.10.3, which has the module for my WiFi card (QCA6390 - Hardware name: Dell Inc. XPS 15 9500/0XWT2F, BIOS 1.4.0 08/14/2020). The wireless card worked at the first boot, but then stopped working producing a stack trace in dmesg: [ 22.919738] WARNING: CPU: 5 PID: 531 at drivers/net/wireless/ath/ath11k/mac.c:5287 ath11k_mac_op_unassign_vif_chanctx+0x1d8/0x2e0 [ath11k] [ 22.919739] Modules linked in: michael_mic snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic snd_sof_pci snd_sof_intel_byt snd_sof_intel_ipc snd_sof_intel_hda_common snd_soc_hdac_hda snd_sof_xtensa_dsp snd_sof_intel_hda snd_sof hid_sensor_als hid_sensor_trigger industrialio_triggered_buffer kfifo_buf hid_sensor_iio_common joydev qrtr_mhi industrialio snd_soc_skl hid_sensor_hub snd_soc_sst_ipc cros_ec_ishtp snd_soc_sst_dsp cros_ec snd_hda_ext_core intel_ishtp_loader snd_soc_acpi_intel_match intel_ishtp_hid snd_soc_acpi snd_hda_intel snd_intel_dspcfg soundwire_intel soundwire_generic_allocation soundwire_cadence qrtr hid_multitouch mousedev 8250_dw snd_hda_codec ns ee1004 ath11k_pci mei_hdcp iTCO_wdt mhi intel_pmc_bxt snd_hda_core dell_laptop iTCO_vendor_support dell_wmi ledtrig_audio snd_hwdep intel_rapl_msr ath11k x86_pkg_temp_thermal dell_smbios intel_powerclamp qmi_helpers soundwire_bus coretemp dell_wmi_descriptor intel_wmi_thunderbolt wmi_bmof dcdbas kvm_intel i915 [ 22.919780] dell_smm_hwmon mac80211 snd_soc_core kvm snd_compress nvidia_drm(POE) i2c_algo_bit irqbypass crct10dif_pclmul ac97_bus nvidia_modeset(POE) crc32_pclmul snd_pcm_dmaengine cfg80211 ghash_clmulni_intel drm_kms_helper nls_iso8859_1 snd_pcm aesni_intel hci_uart crypto_simd snd_timer cryptd cec glue_helper btqca snd btrtl rapl intel_lpss_pci btbcm intel_gtt i2c_i801 mei_me intel_ish_ipc btintel processor_thermal_device vfat intel_cstate intel_lpss syscopyarea sysfillrect fat nvidia(POE) intel_uncore pcspkr soundcore i2c_smbus libarc4 thunderbolt ucsi_acpi mei bluetooth idma64 intel_ishtp intel_rapl_common sysimgblt typec_ucsi fb_sys_fops tpm_crb intel_soc_dts_iosf intel_pch_thermal typec tpm_tis tpm_tis_core tpm ecdh_generic rng_core rfkill int3403_thermal mac_hid ecc wmi i2c_hid int340x_thermal_zone video intel_hid int3400_thermal acpi_thermal_rel sparse_keymap acpi_tad acpi_pad drm sg fuse crypto_user agpgart bpf_preload ip_tables x_tables ext4 crc32c_generic crc16 mbcache jbd2 [ 22.919840] rtsx_pci_sdmmc mmc_core crc32c_intel serio_raw rtsx_pci xhci_pci xhci_pci_renesas [ 22.919847] CPU: 5 PID: 531 Comm: wpa_supplicant Tainted: P OE 5.10.3-arch1-1 #1 [ 22.919848] Hardware name: Dell Inc. XPS 15 9500/0XWT2F, BIOS 1.4.0 08/14/2020 [ 22.919855] RIP: 0010:ath11k_mac_op_unassign_vif_chanctx+0x1d8/0x2e0 [ath11k] [ 22.919857] Code: 8b 85 e0 02 00 00 4c 89 e9 be 10 00 00 00 4c 89 e7 48 c7 c2 c8 02 8a c2 e8 55 52 01 00 80 bd 98 03 00 00 00 0f 85 71 fe ff ff <0f> 0b e9 6a fe ff ff f0 80 a3 d8 16 00 00 fe f6 05 92 34 05 00 10 [ 22.919858] RSP: 0018:ffffa32400e47808 EFLAGS: 00010246 [ 22.919860] RAX: 0000000000000000 RBX: ffff974428ed9d40 RCX: 0000000000000000 [ 22.919861] RDX: ffff974417f50000 RSI: ffff974419a59548 RDI: ffff97441439b5f8 [ 22.919862] RBP: ffff974419a59548 R08: ffff974419a58940 R09: ffffa32400e47648 [ 22.919863] R10: ffffa32400e47640 R11: ffffffffb22cb1e8 R12: ffff974414740000 [ 22.919864] R13: ffff974428ed9d98 R14: ffff974414399ee0 R15: ffff97441439b5f8 [ 22.919865] FS: 00007ff192751cc0(0000) GS:ffff97535b740000(0000) knlGS:0000000000000000 [ 22.919866] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 22.919867] CR2: 000055c030d5a018 CR3: 000000010fcdc005 CR4: 00000000007706e0 [ 22.919868] PKRU: 55555554 [ 22.919869] Call Trace: [ 22.919900] ieee80211_assign_vif_chanctx+0x81/0x440 [mac80211] [ 22.919922] __ieee80211_vif_release_channel+0x4f/0x130 [mac80211] [ 22.919941] ieee80211_vif_release_channel+0x3a/0x50 [mac80211] [ 22.919964] ieee80211_mgd_auth.cold+0x10a/0x160 [mac80211] [ 22.919988] cfg80211_mlme_auth+0x127/0x240 [cfg80211] [ 22.920004] nl80211_authenticate+0x2ac/0x300 [cfg80211] [ 22.920010] genl_family_rcv_msg_doit+0xfd/0x160 [ 22.920013] genl_rcv_msg+0xef/0x1e0 [ 22.920015] ? netlink_sendmsg+0x33b/0x480 [ 22.920029] ? nl80211_parse_key+0x310/0x310 [cfg80211] [ 22.920031] ? genl_get_cmd+0xd0/0xd0 [ 22.920032] netlink_rcv_skb+0x5b/0x100 [ 22.920034] genl_rcv+0x24/0x40 [ 22.920036] netlink_unicast+0x242/0x340 [ 22.920038] netlink_sendmsg+0x243/0x480 [ 22.920040] sock_sendmsg+0x5e/0x60 [ 22.920042] ____sys_sendmsg+0x25a/0x2a0 [ 22.920044] ? copy_msghdr_from_user+0x6e/0xa0 [ 22.920046] ___sys_sendmsg+0x97/0xe0 [ 22.920050] __sys_sendmsg+0x81/0xd0 [ 22.920054] do_syscall_64+0x33/0x40 [ 22.920056] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 22.920058] RIP: 0033:0x7ff192ba07e7 [ 22.920061] Code: 0c 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10 [ 22.920062] RSP: 002b:00007ffdb25bb4a8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 22.920064] RAX: ffffffffffffffda RBX: 0000562ffc838780 RCX: 00007ff192ba07e7 [ 22.920065] RDX: 0000000000000000 RSI: 00007ffdb25bb4e0 RDI: 0000000000000006 [ 22.920066] RBP: 0000562ffc838690 R08: 0000000000000004 R09: 0000562ffc82e010 [ 22.920067] R10: 00007ffdb25bb5b4 R11: 0000000000000246 R12: 0000562ffc8774c0 [ 22.920067] R13: 00007ffdb25bb4e0 R14: 00007ffdb25bb5b4 R15: 0000562ffc869a90 A quick search on the mailing list pointed me to this thread - https://marc.info/?l=linux-wireless&m=160527461622577&w=2 - which might or might not be related. I'm attaching the full dmesg output, in case it's useful, and I'm available to test patches :) Luca
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