WARN_ON_ONCE(work > weight) in napi_poll()

[Andrey Ryabinin]

On 07/04/2017 04:49 PM, Kalle Valo wrote:
> Andrey Ryabinin <aryabinin at virtuozzo.com> writes:
> 
>> I occasionally hit WARN_ON_ONCE(work > weight); in napi_poll() on a
>> laptop with ath10k card.
>>
>>
>> [37207.593370] ------------[ cut here ]------------
>> [37207.593380] WARNING: CPU: 0 PID: 7 at ../net/core/dev.c:5274
>> net_rx_action+0x258/0x360
>> [37207.593381] Modules linked in: snd_hda_codec_realtek snd_soc_skl
>> snd_hda_codec_generic snd_soc_skl_ipc snd_soc_sst_ipc snd_soc_sst_dsp
>> snd_hda_ext_core snd_soc_sst_match snd_soc_core rtsx_pci_sdmmc
>> mmc_core snd_pcm_dmaengine x86_pkg_temp_thermal snd_hda_intel uvcvideo
>> kvm_intel videobuf2_vmalloc kvm snd_hda_codec snd_hwdep btusb
>> videobuf2_memops btintel snd_hda_core videobuf2_v4l2 bluetooth
>> irqbypass snd_pcm videobuf2_core crc32c_intel videodev mei_me mei
>> rtsx_pci intel_lpss_pci intel_lpss_acpi intel_vbtn intel_lpss mfd_core
>> tpm_tis intel_hid tpm_tis_core tpm efivarfs
>> [37207.593430] CPU: 0 PID: 7 Comm: ksoftirqd/0 Not tainted 4.11.7 #28
>> [37207.593432] Hardware name: Dell Inc. XPS 13 9360/0839Y6, BIOS 1.3.5 05/08/2017
> 
> What firmware and hardware versions exactly? The dmesg output when
> ath10k loads is preferred. As you are using XPS 13 I'm guessing it's one
> of QCA6174 family.
> 

Yes it's qca6174.

$ dmesg |grep ath10
[    0.624828] ath10k_pci 0000:3a:00.0: enabling device (0000 -> 0002)
[    0.626370] ath10k_pci 0000:3a:00.0: pci irq msi oper_irq_mode 2 irq_mode 0 reset_mode 0
[    0.837862] ath10k_pci 0000:3a:00.0: qca6174 hw3.2 target 0x05030000 chip_id 0x00340aff sub 1a56:1535
[    0.837863] ath10k_pci 0000:3a:00.0: kconfig debug 0 debugfs 1 tracing 0 dfs 0 testmode 0
[    0.838388] ath10k_pci 0000:3a:00.0: firmware ver WLAN.RM.2.0-00180-QCARMSWPZ-1 api 4 features wowlan,ignore-otp,no-4addr-pad crc32 75dee6c5
[    0.900606] ath10k_pci 0000:3a:00.0: board_file api 2 bmi_id N/A crc32 19644295
[    3.020681] ath10k_pci 0000:3a:00.0: htt-ver 3.26 wmi-op 4 htt-op 3 cal otp max-sta 32 raw 0 hwcrypto 1
[    9.574087] ath10k_pci 0000:3a:00.0 wlp58s0: renamed from wlan0