Created attachment 295649 [details] dmesg output Hi, thank you for adding support for the ath11k_pci driver support! I've a Dell XPS 13 9310 with a Killer Wi-Fi 6 AX500-DBS pci card running ArchLinux. Connecting to a 2.4 GHz WiFi works fine with the recent kernel version 5.11.2. However, if I try to connect to a 5 GHz-only network, the firmware crashes with the following error: firmware crashed: MHI_CB_SYS_ERROR Thanks, Sven
Some additional information: The bug occurs every time I try to connect to the 5 GHz WiFi but never on the 2.4 GHz WiFi (same WiFi access point). I've added the workaround for the memory under 32M limit to my Linux cmdline: memmap=12M$20M
Does the AP have 160 MHz channels enabled? There is a know crash with that, you could try reverting: 3579994476b6 wireless: fix wrong 160/80+80 MHz setting
Yes, my AP has 160 MHz channels enabled. It has no option to disable 160 MHz channels, so I've switched from 802.11n+ac+ax (Wi-Fi 6) mode to 802.11a+n (Wi-Fi 4) mode and the problem was gone. I've started recompiling the kernel without the commit 3579994476b6 and will try it tomorrow.
Thanks, let me know how the revert works. Changing the title to better reflect the bug.
The kernel build with the revert works fine. I've no problem connecting to the 802.11n+ac+ax 5 GHz access point anymore.
Is this problem expected to be present in kernel 5.13.5? See https://bugzilla.kernel.org/show_bug.cgi?id=213937 which might actually be a duplicate of this ticket here.
The last time I had this bug was on kernel version 5.13.4-arch2-1 (official Arch Linux kernel). I had this issue every time I connected to my 5 GHz-only network, too. With kernel 5.13.5-arch1-1 and kernel 5.13.6-arch1-1 it couldn't reproduce the bug, yet. However, I've encountered a CPU soft lockup with recent versions. This problem is mentioned in the bug report [1], too. So I will compile a vanilla/mainline kernel and if I can reproduce the problem with it. $ journalctl | grep ath11k_mac_op_unassign_vif_chanctx -A 10 [...] -- Jul 25 21:46:24 sven-xps kernel: WARNING: CPU: 2 PID: 800 at drivers/net/wireless/ath/ath11k/mac.c:5582 ath11k_mac_op_unassign_vif_chanctx+0x182/0x280 [ath11k] Jul 25 21:46:24 sven-xps kernel: Modules linked in: ccm michael_mic xt_conntrack nft_chain_nat xt_MASQUERADE nf_nat nf_conntrack_netlink nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nft_counter snd_seq_dummy snd_hrtimer snd_seq snd_seq_device xt_addrtype nft_compat nf_tables libcrc32c br_netfilter bridge stp llc overlay rfcomm cmac algif_hash algif_skcipher af_alg snd_ctl_led snd_soc_skl_hda_dsp snd_soc_hdac_hdmi snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic nfnetlink bnep hid_sensor_als hid_sensor_trigger industrialio_triggered_buffer kfifo_buf hid_sensor_iio_common industrialio snd_soc_dmic hid_sensor_hub cros_ec_ishtp joydev cros_ec intel_ishtp_loader mousedev qrtr_mhi intel_ishtp_hid snd_sof_pci_intel_tgl 8250_dw snd_sof_intel_hda_common iTCO_wdt soundwire_intel intel_pmc_bxt wacom hid_multitouch iTCO_vendor_support soundwire_generic_allocation intel_tcc_cooling usbhid soundwire_cadence x86_pkg_temp_thermal dell_laptop intel_powerclamp intel_pmt_telemetry coretemp mei_hdcp intel_pmt_class Jul 25 21:46:24 sven-xps kernel: intel_rapl_msr dell_smm_hwmon snd_sof_intel_hda kvm_intel snd_sof_pci snd_sof_xtensa_dsp kvm snd_sof snd_soc_hdac_hda snd_hda_ext_core irqbypass snd_soc_acpi_intel_match intel_cstate snd_soc_acpi intel_uncore soundwire_bus ledtrig_audio snd_soc_core qrtr ns snd_compress pcspkr psmouse ac97_bus ath11k_pci snd_pcm_dmaengine ath11k snd_hda_intel snd_intel_dspcfg dell_wmi snd_intel_sdw_acpi dell_smbios qmi_helpers dell_wmi_sysman snd_hda_codec dcdbas snd_hda_core mac80211 dell_wmi_descriptor wmi_bmof snd_hwdep snd_pcm intel_spi_pci snd_timer intel_spi i2c_i801 spi_nor snd mtd i2c_smbus soundcore cfg80211 uvcvideo mhi videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 libarc4 videobuf2_common videodev mei_me intel_lpss_pci vfat intel_lpss fat mei i915 mc idma64 intel_ish_ipc i2c_algo_bit tpm_crb intel_ishtp thunderbolt intel_pmt drm_kms_helper hci_uart cec processor_thermal_device ucsi_acpi processor_thermal_rfim intel_gtt typec_ucsi btqca processor_thermal_mbox syscopyarea btrtl Jul 25 21:46:24 sven-xps kernel: processor_thermal_rapl sysfillrect typec tpm_tis intel_rapl_common sysimgblt btbcm intel_soc_dts_iosf fb_sys_fops roles tpm_tis_core btintel bluetooth mac_hid ecdh_generic rfkill i2c_hid_acpi ecc i2c_hid int3403_thermal int340x_thermal_zone intel_hid sparse_keymap acpi_tad int3400_thermal acpi_thermal_rel acpi_pad drm sg crypto_user fuse agpgart bpf_preload ip_tables x_tables ext4 crc32c_generic crc16 mbcache jbd2 dm_crypt cbc encrypted_keys dm_mod trusted asn1_encoder tee tpm rng_core rtsx_pci_sdmmc mmc_core serio_raw atkbd libps2 crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel rtsx_pci xhci_pci xhci_pci_renesas wmi i8042 serio video aesni_intel crypto_simd cryptd Jul 25 21:46:24 sven-xps kernel: CPU: 2 PID: 800 Comm: wpa_supplicant Not tainted 5.13.4-arch2-1 #1 Jul 25 21:46:24 sven-xps kernel: Hardware name: Dell Inc. XPS 13 9310/0MRT12, BIOS 2.2.0 04/06/2021 Jul 25 21:46:24 sven-xps kernel: RIP: 0010:ath11k_mac_op_unassign_vif_chanctx+0x182/0x280 [ath11k] Jul 25 21:46:24 sven-xps kernel: Code: 8b 83 e0 02 00 00 4c 89 e1 be 10 00 00 00 4c 89 ef 48 c7 c2 30 61 2e c1 e8 2b 6c 01 00 80 bb 98 03 00 00 00 0f 85 c3 fe ff ff <0f> 0b e9 bc fe ff ff f0 80 a5 d8 16 00 00 fe f6 05 78 98 05 00 10 Jul 25 21:46:24 sven-xps kernel: RSP: 0018:ffffa55d80f777e0 EFLAGS: 00010246 Jul 25 21:46:24 sven-xps kernel: RAX: 0000000000000000 RBX: ffff98ecd944d570 RCX: 0000000000000000 Jul 25 21:46:24 sven-xps kernel: RDX: ffff98ecc6cd4b80 RSI: ffff98ecd944d570 RDI: ffff98ecde91b658 Jul 25 21:46:24 sven-xps kernel: RBP: ffff98ecd944c940 R08: ffff98ecd944c940 R09: ffffa55d80f77628 Jul 25 21:46:24 sven-xps kernel: R10: ffffa55d80f77620 R11: ffffffff896ccde8 R12: ffff98ee088dc598 Jul 25 21:46:24 sven-xps kernel: R13: ffff98ecd6520000 R14: ffff98ecde919f40 R15: ffff98ecde91b658 Jul 25 21:46:24 sven-xps kernel: FS: 00007f0d9218b7c0(0000) GS:ffff98f42f680000(0000) knlGS:0000000000000000 Jul 25 21:46:24 sven-xps kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Jul 25 21:46:24 sven-xps kernel: CR2: 00002b4081f66000 CR3: 000000011cc94003 CR4: 0000000000770ee0 [1] "watchdog: BUG: soft lockup - CPU#X stuck for", see comment #200069 from Bjørn Snoen (Monday, 24 May 2021, 21:20 GMT): https://bugs.archlinux.org/task/69223#comment200069
*** Bug 213937 has been marked as a duplicate of this bug. ***
I was told that this cfg80211 commit should fix this: https://git.kernel.org/linus/e6ed929b4140 It was introduced in v5.14-rc1, but I do not know if it was ported to older stable releases. Marking the bug fixed.